Installations

SPECIFICATION FOR ELECTRICAL INSTALLATIONS

0
rev.

02-02-2002 Approved Issue
date Description/issued for prepared client: ADWEA project: STANDARD SPECIFICATIONS FOR WATER WORKS title: SPECIFICATION FOR ELECTRICAL INSTALLATIONS authorised

tender:

project:

document: W-E-SS-013

rev: 0

sheet: 1

of: 50

Table of Contents 1. 2. 3.

page

SCOPE...................................................................................................3 GENERAL REQUIREMENTS ................................................................3 STANDARDS AND CODES ..................................................................3 3.1 Standards ....................................................................................3 3.2 Local Regulations ........................................................................4 SITE CONDITIONS................................................................................4 4.1 General........................................................................................4 ELECTRICAL SYSTEM.........................................................................4 DESIGN CONSIDERATIONS ................................................................5 GENERAL CONSTRUCTION REQUIREMENTS ..................................5 INSTALLATION SPECIFICATION ........................................................7 8.1 Scope ..........................................................................................7 8.2 Lighting and Small Power System Installation Works..................8 8.3 Transformers .............................................................................12 8.4 Battery and Charges..................................................................13 8.5 Cable Installation .......................................................................13 8.6 Electrical Variable Speed Drive System (EVSDS) Installation...17 8.7 Earthing System Installation Works ...........................................18 FIELD INSPECTION AND TESTING...................................................19 9.1 General......................................................................................20 9.2 Motor Tests ...............................................................................20 9.3 Grounding Resistance Tests .....................................................20 9.4 Transformer Tests .....................................................................20 9.5 11 kV and L.V. Switchgear Tests...............................................21 9.6 Electrical Variable Speed Drive System Tests (EVSDS) ...........21 9.7 DC Supply System and Uninterruptible Power Supply (UPS) Units ..........................................................................................21 9.8 Cable Installation Tests .............................................................22 9.9 Wiring Insulation Tests ..............................................................22 9.10 Lighting and Small Power Systems Tests .................................23 9.11 Functional Tests ........................................................................23 9.12 Measurement of Harmonic Levels .............................................23 ACCEPTANCE OF WORK ..................................................................23 INSPECTION FORMS .........................................................................24

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Client Project: Title:

ADWEA STANDARD SPECIFICATIONS FOR WATER WORKS SPECIFICATION FOR ELECTRICAL INSTALLATIONS

tender:

project:

document: W-E-SS-013

rev: 0

sheet: 2

of: 50

1.

SCOPE
This specifications covers the general scope of work for the electrical installations to be carried out for the project. The works shall cover the detail design, installation, connection, testing and commissioning of all electrical works related to the project including supply of all required installation materials such as frames, supports, fixings, trays, conduits, and all required accessories for installing the specified equipment's.

2.

GENERAL REQUIREMENTS
The specification details the broad guidelines for installations, testing and commissioning of electrical equipment. The work shall be carried out as per standard practices, vendors specific instruction and to the approval of ADWEA/Engineer. The installation of the electrical system, equipment and materials shall be carried out as laid down in this specification, supplemented by other documents and drawings included in tender. In case further drawings, calculations, documents, etc., are required for completing the work, these shall be provided by the CONTRACTOR and deemed to be included in the contract price. It shall be noted that, all tender drawings, details are indicative. It shall be the CONTRACTORs responsibility to evaluate the complete and detailed requirements of the installation for proper operation. The CONTRACTOR shall be responsible for providing all tools, instruments and equipment necessary for the installation, testing and commissioning and proper operation of entire electrical system.

3.

STANDARDS AND CODES
The electrical installation works shall be carried out in compliance with the requirements contained in the latest editions and supplements of the following Standards, Codes and regulations :-

3.1

Standards
Miniature fuses Low voltage fuses Cable trunking and ducting system for electrical installations Electrical Installations of buildings Specification for PVC insulated cables of rated voltages up to and including 450/750 V
Client Project: Title:

IEC 60127 IEC 60269 IEC 61084 IEC 60364

IEC 60227

ADWEA STANDARD SPECIFICATIONS FOR WATER WORKS SPECIFICATION FOR ELECTRICAL INSTALLATIONS

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project:

document: W-E-SS-013

rev: 0

sheet: 3

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Power cable with extruded insulation and their accessories for rated voltages from 1kV up to 30 kV Calculation of the continuous current rating of cables (100% load factor) Nominal cross-sectional areas and composition of conductors of insulated cables Rubber insulated flexible cables and cords with circular conductors and a rated voltage not exceeding 750V Standards colours for p.v.c. insulation for low frequency cables and wires General purpose and specification for luminaires emergency lighting Outside diameters of conduits for electrical installations and threads for conduits & fittings Specification for conduits for electrical installations Specification for conduit fittings for electrical installations

IEC 60502 IEC 60287

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IEC 60228

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IEC 60245

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IEC 60304

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IEC 60598

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IEC 60423

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IEC 60614

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IEC 61035

3.2

Local Regulations
Regulations for Electrical Installation Works by the Abu Dhabi Water and Electricity Authority (ADWEA).

4. 4.1

SITE CONDITIONS General
For general climatic conditions applicable to the project installations, refer to Specifications for General Technical Requirements.

5.

ELECTRICAL SYSTEM
The electrical distribution system at the above mentioned sites are as follows: Electrical supply Electrical distribution : : 3 Phase, 11kV AC, 50 Hz 3 Phase, neutral & earth 415/240V AC, 50 Hz

Client Project: Title:

ADWEA STANDARD SPECIFICATIONS FOR WATER WORKS SPECIFICATION FOR ELECTRICAL INSTALLATIONS

tender:

project:

document: W-E-SS-013

rev: 0

sheet: 4

of: 50

System variations

:

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voltage, plus or minus 10% frequency, plus or minus 5% combined absolute, voltage and frequency variations not more than 5%.

6.

DESIGN CONSIDERATIONS
Design considerations for all electrical equipment, materials and installation shall take into account the following:Above specified standards and site conditions Above specified electrical system and variation Voltage drop in cables shall not exceed the following, in percent of system nominal lineto neutral voltage: ...Motor feeders (starting) 15% ...Motors feeder (running) 5% The voltage drops at buses shall not exceed values which cause magnetically-held contactors supplied from the buses to chatter or drop out and shall not exceed values which prevent the contactors from remaining closed when carrying motor locked rotor current during re-acceleration.

7.

GENERAL CONSTRUCTION REQUIREMENTS
The electrical installation work shall comply with the latest applicable international or local standards. Nothing in this specification shall be construed to relieve the CONTRACTOR of this responsibility. The CONTRACTOR shall coordinate with ADWEA/ENGINEER for all matters relating to construction, operation, safety, etc. Use shall be made of exclusively new and modern materials, satisfactory for the intended purpose. All material to be used for construction shall be subject to prior approval of ADWEA/ENGINEER. Manufacturer's catalogues and/or samples shall be submitted for approval before purchase of the material. The CONTRACTOR shall furnish all tools, welding equipment, rigging materials, testing equipment, test connection kits etc. required for the complete installation, testing and commissioning of items included in the contract work.

Client Project: Title:

ADWEA STANDARD SPECIFICATIONS FOR WATER WORKS SPECIFICATION FOR ELECTRICAL INSTALLATIONS

tender:

project:

document: W-E-SS-013

rev: 0

sheet: 5

of: 50

All electrical equipment shall be delivered to job sites just prior to their installation to minimize the possibility of damage. No electrical equipment shall be left lying around on the construction site. Electrical equipment supplied as units for assembly at site shall be clearly marked to facilitate assembly. Materials and equipment not required for immediate installation shall be stored in a separate store protecting them from shock, weather, dust and damage from chemical or construction material. Upon receipt, each item shall be checked for complete compliance with purchase specifications, damage, shortage of components, repaired or replaced. All covers and plugs on equipment connections shall be left in place until the moment the connections are used. The work shall be carried out as per the manufacturer's instructions and approved drawings. In case of any doubt/misunderstanding as to the interpretations of the drawings or instructions, necessary clarifications shall be obtained and approved by ADWEA/ENGINEER. The CONTRACTOR shall be held responsible for any damage to any equipment and material. The CONTRACTOR shall engage where necessary specialist engineers from equipment manufacturer to supervise installation, testing and commissioning of specified equipment or materials, CONTRACTOR shall extend full co-operation to these specialist engineers and carry out the works to their instruction. The works may include rewiring/modifications as may be necessary during commissioning. The CONTRACTOR shall carry out touch-up painting to equipment soiled, marred or damaged during installation or handling. The paint shall be supplied by the CONTRACTOR. Care shall be exercised in handling equipment to avoid distortion to stationary structures, marring of finish, or damaging of delicate instruments or other electrical parts. In order to avoid hazard to personnel moving around an equipment such as switchgear etc. which is kept charged after installation such equipment shall be cordoned off for safety reasons. The CONTRACTOR shall ensure good quality workmanship and assign qualified supervisors/engineers and competent skilled labour, careful and experienced in their trades. The ADWEA/ENGINEER reserve the right to reject personnel they consider not competent or not suitable for the type of work. Equipment shall be installed in a neat workmanship like manner so that it is level, plumb, square and properly aligned and oriented. Tolerances shall be established in the manufacturer's drawings or stipulated by ADWEA/ENGINEER at site. No equipment shall be

Client Project: Title:

ADWEA STANDARD SPECIFICATIONS FOR WATER WORKS SPECIFICATION FOR ELECTRICAL INSTALLATIONS

tender:

project:

document: W-E-SS-013

rev: 0

sheet: 6

of: 50

permanently bolted down to foundations or structure until alignment has been checked and accepted by the ADWEA/ENGINEER. All new foundations required for installation of electrical equipment shall also be constructed by CONTRACTOR. Minor modifications to existing foundations, wherever found necessary for proper installations shall also be carried out by CONTRACTOR as and when required to suit the requirements of the work. Drawings showing details for various switchboards/MCC, transformers, motors etc. are for information only. These shall be modified/replaced by proper detailed drawings to suit the actual equipment requirements. CONTRACTOR shall provide required Vendor details/ drawings to the ADWEA/ENGINEER. CONTRACTOR shall be responsible to check/ confirm that Vendor information provided are sufficient to carry out the work. The ADWEA/ENGINEER reserve the right to direct the removal or replacement of any work which they consider, does not present an orderly or reasonably neat workmanlike appearance, provided that such work can be properly installed in an orderly way by usual methods. Such removal or replacement shall be done solely at the CONTRACTOR's expense. It is not permitted to leave rubbish and scrap material lying about the site. This shall be collected daily and removed from site by dedicated crew for cleaning. In case tidiness on site is not to ADWEA's satisfaction, ADWEA has the right to carry out cleaning operation themselves and all expenses incurred therein shall be to the CONTRACTOR's account. Upon completion of the work all tools equipment and instruments shall be promptly demobilized on site. Electrical installation work shall comply with the latest applicable IEC/BS/IEE Standards, Regulations and Safety Codes. Nothing in this specification shall be construed to relieve the CONTRACTOR of this responsibility. Installation work shall conform to the latest applicable Codes of Practice, Fire Insurance Regulations and Standards and local regulations (ADWEA, Civil Defence, etc.).

8. 8.1

INSTALLATION SPECIFICATION Scope
The CONTRACTOR shall be responsible in every respect for the complete detail design, supply and installation of all required equipment and material on site, testing and commissioning. The electrical scope of work for each site shall be as specified separately in the scope of electrical work section. The main installation work to be carried out are including but not limited to the following : Installation of main equipment i.e. 11kV, and 415V switch boards/MCC, transformers, frequency converters, UPS systems and DC supply system.
Client Project: Title:

ADWEA STANDARD SPECIFICATIONS FOR WATER WORKS SPECIFICATION FOR ELECTRICAL INSTALLATIONS

tender:

project:

document: W-E-SS-013

rev: 0

sheet: 7

of: 50

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Installation of indoor/outdoor lighting and small power equipment and associated distribution boards. Installation of electrical power and control cables. Earthing and lighting protection system for all equipment and installation. Electrical equipment for subsystem packages such as pumps hydraulic coupling auxiliaries, compressors, MOVs, etc.

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Installation of equipment includes supply of all installation materials, tools and accessories, test equipment and testing and commissioning of the equipment.

8.2
8.2.1

Lighting and Small Power System Installation Works
General
The CONTRACTOR shall design, supply, install, test and commission complete lighting system and power socket outlets for the new pump station. The CONTRACTOR shall carry out lighting calculation based on the final size of the rooms and the lighting fitting provided by him such that the lighting illumination level as specified in drawings are achieved for a maintenance factor of 0.8. The whole lighting system shall be designed to provide adequate visual performance and safety and shall be free from excessive glare, stroboscopic effects and flicker from lamps. The system shall include provision for ease of erection, maintenance, cleaning and lamp replacement. Light fittings shall be surface mounted or flush type based on the type of ceiling. All light fittings shall be of highest quality from reputed manufacturers and identical to existing installations and subject to ADWEA/ENGINEER approval. In determining the location and height of light fittings, consideration shall be given to the problem of lamp replacement. Lighting fixtures shall be distributed on the three phases as to ensure equal loading and be field mounted in such a manner as to obtain uniform illumination level if half of the fixtures of certain area where switched off. An emergency lighting system including EXIT lights shall be installed to provide necessary illumination in case of AC mains failure. Emergency lighting shall be switched on automatically on AC mains failure. For this project self contained maintained/non-maintained light fittings shall be used. Outdoor lighting fittings shall be provided on the outside of buildings. The installation work shall include fixing of all equipment associated with lighting system, routing and laying conduits, wiring, termination, testing, commissioning and all other work necessary for completing the job.
Client Project: Title:

ADWEA STANDARD SPECIFICATIONS FOR WATER WORKS SPECIFICATION FOR ELECTRICAL INSTALLATIONS

tender:

project:

document: W-E-SS-013

rev: 0

sheet: 8

of: 50

The supply of all mounting accessories, earthing wires and incidental hardware and consumables like fixing saddles, spacer plates, junction boxes and conduits required for fitting fixing/suspension supports, joint boxes and connectors, wire labels ferrules, fixing brackets, screws, studs, shall be deemed to be included as part of installation work. Mounting accessories like saddles, spacer plates, joint boxes, junction boxes and fixing hardware shall be of galvanized mild steel. The CONTRACTOR shall be responsible for replacement of parts of light fittings and power sockets and accessories that are lost or damaged and if fluorescent tubes/ incandescent lamps/mercury vapour lamps/enclosures of glass/plastic etc. are broken during installation. All damages shall be replaced or repaired to the satisfaction of ADWEA/ENGINEER. Power supply cables for outdoor lighting up to the main junction terminal box of the fitting concerned and the connections required from the main junction terminal box to the fitting shall be in the scope of this Contract. The required earth wire for outdoor lighting shall be laid in the same trench excavated for the lighting supply cable. The required conduits for lighting wiring shall be suitably and neatly routed at site by the CONTRACTOR taking into consideration ease in maintenance. Except as specifically approved by the ADWEA/ENGINEER, installation of exposed conduits, mounting of lighting fixtures etc. shall be taken up only after all other services such as piping, air ducting, cable tray/bus duct hangers, structural bracings etc. in a particular area have been installed. Lighting panels, light control switches and receptacles shall be installed at the same mounting heights from finished floor/ground levels as existing. However this requirement is superseded if the same is specifically shown in the project drawing or instructed otherwise at site by ADWEA/ENGINEER.

8.2.2

Lighting Panel/Distribution Board
Lighting panel/distribution board shall be protected by ELCB (for rating up to 100 Amps) and by ELR (for rating above 100 Amps) with 100 mA sensitivity. Lighting panel/Distribution Board shall be installed by the CONTRACTOR on walls/columns by fastening to suitably grouted studs of not less than 12mm dia. Any minor civil work such as chipping/concreting/embedding etc. required for installation work shall be carried out by the CONTRACTOR with supply of necessary materials.

8.2.3

Lighting Fixtures
Lighting fixtures of appropriate types as per CONTRACTOR's drawings approved by ADWEA/ENGINEER shall be installed by the CONTRACTOR. CONTRACTOR shall also take into consideration the manufacturer's recommended or specified installation requirements.
Client Project: Title:

ADWEA STANDARD SPECIFICATIONS FOR WATER WORKS SPECIFICATION FOR ELECTRICAL INSTALLATIONS

tender:

project:

document: W-E-SS-013

rev: 0

sheet: 9

of: 50

Suspensions in the form of conduits/chains/steel structural members clamps etc., for installation of fixtures, fixing brackets or similar items required for mounting of fixtures shall be supplied by the CONTRACTOR. Shades or reflectors of light points shall not be in contact with structural members, pipe work etc. Fixtures shall not be installed to any of supports provided for other services.

8.2.4

Switches and power sockets
Switches and power sockets shall be provided as indicated on drawings. The types and details shall be indicated in CONTRACTOR's drawings and approved by ADWEA/ENGINEER. Locations of switches/receptacles shown on the project drawings are for guidance only. Exact locations shall be finalized by the CONTRACTOR in consultation with ADWEA/ENGINEER. Switches/receptacles which are to be wired on the same phase and to be located close to each other shall be accommodated/housed in a common box. Switches/receptacles wires on different phases shall be separated as per ADWEA requirements. Distribution boards supplying power sockets shall be protected by ELCB (for rating up to 100 Amps) and by ELR (for rating above 100 Amps) with 30 mA sensitivity. Outdoor lighting switches and socket outlets shall be weatherproof IP 55

8.2.5

Conduits
CONTRACTOR shall be responsible for any installations requiring concealed conduiting on walls/ceiling from lighting panels to light fittings, power socket, inspection/junction boxes etc. Conduits for lighting and small power when embedded into concrete or buried into block works shall be of suitable rigid PVC pipe of 20mm dia. minimum size. Minimum size of rigid conduits used for wiring shall be of 20 mm dia. in case of exposed systems and 25 mm dia. in case of concealed/embedded systems. For rigid metallic conduit saddles shall be used as means of support. Spacing between saddles not to exceed 1m. In addition saddles shall be located on either end of couplers/bends or similar fittings/accessories. In such cases the saddles shall be located at a distance not exceeding 300 mm from the fitting/ accessories. Separate conduits shall be used for wiring lighting circuits of different lighting distribution systems such as normal, emergency etc. Also, wires for lighting & socket outlets will be run in separate conduits. Suitable pipe/conduit sleeves shall be used when wires are passed through walls/floors and these shall be sealed properly.

Client Project: Title:

ADWEA STANDARD SPECIFICATIONS FOR WATER WORKS SPECIFICATION FOR ELECTRICAL INSTALLATIONS

tender:

project:

document: W-E-SS-013

rev: 0

sheet: 10

of: 50

The internal area of conduit shall be 2.5 times the total area of cables to be pulled through it. A table is given below as a guideline. Max. No. of 450/750V Grade Single core PVC Insulated Flex, Wires 2.5 mm² 4 mm² 6 mm² 10 mm² 5 3 2 8 6 5 3 8 5 6

Nominal size 20 25 32 40

All necessary bends in the system including diversions shall be done by bending the conduits or by inserting suitable solid/inspection type bends/elbows etc. or by fixing cast iron inspection boxes.

8.2.6

Wiring/Cabling
Unless otherwise stated, the mode of wiring will be as follows: a) 450/750V PVC insulated flexible single core wires in rigid steel conduits for indoor lighting. Outdoor lighting cables shall be directly buried in ground at a minimum depth of 800 mm or routed in the available cable trenches. Cables crossing roads shall be laid in concrete encased PVC pipes.

b)

Where span of more than 1m occur between beams and supports, suitable size galvanized steel sections shall be provided by the CONTRACTOR for fixing conduits, cabling or fittings. Stranded conductors having a nominal cross sectional area exceeding 6 mm² shall be provided with soldered/crimped terminal lugs. When a stranded conductor having a nominal cross-sectional area less than 6 mm² is not provided with cable lugs, all strands at the exposed end of the cable shall be soldered together. Size of wire shall be chosen to limit voltage drop to within 2.5%. Minimum area of conductor shall be 2.5 sq.mm copper, unless otherwise specified, density not to exceed 2.5A/sq.mm. Generally not more than 8 to 10 points shall be wired in one circuit. For the purpose of calculating connected loads of various circuits a multiplying factor of 1.25 will be assumed to the rated lamp wattage for mercury vapour and fluorescent lamp fixtures to take into account losses in the control gear. A loading of 100 watts and 500 watts will be assumed for singlephase of 5 Amps and 15 Amps power sockets respectively. All types of wiring, concealed or unconcealed shall be capable of easy inspection. Unconcealed wiring when run along walls shall be as near as possible to ceiling. In all types of wiring, due consideration shall be given for neatness and good appearance.

Client Project: Title:

ADWEA STANDARD SPECIFICATIONS FOR WATER WORKS SPECIFICATION FOR ELECTRICAL INSTALLATIONS

tender:

project:

document: W-E-SS-013

rev: 0

sheet: 11

of: 50

Wiring shall be colour coded so as to enable easy identification of phase and neutral conductors. Each circuit live conductor shall be protected by circuit breaker in lighting panel/distribution board. The wiring throughout the installation shall be such that there is no break in neutral wire in the form of switch or fuse unit. Conductors not intended for connection to the same system and circuit or supply different phases from the same supply, shall be kept apart throughout their entire run. Wires belonging to different phases shall not be run in the same conduit. However, more than one circuit, consisting of phase and neutral wires, of the same phases can be run in the same conduit. For every phase wire a separate neutral wire shall be run. Receptacles and lighting fittings in general shall be fed from separate circuits. Each lighting circuit live conductor from a lighting panel/distribution board shall be controlled by a single-pole switch. For long conduit runs, inspection/pull boxes shall be provided at intervals not exceeding 10m. Such facilities shall also be provided at conduit bends.

8.3

Transformers
Inspection, storage, installation, testing and commissioning of transformers (including phase shift transformers) shall be in accordance with the specified code of practice and Manufacturer's instructions. The CONTRACTOR shall: (a) assemble the transformers with all the necessary fittings such as valves, pipings, boxes, marshalling boxes, etc.; (b) arrange for oil testing and filtration (if required) before energizing; (c) provide wedges/clamps to rigidly station all transformers on rails; (d) connect up the transformer's terminals; (e) lay and terminate cables/conduits and earthing connections between all the accessories mounted on the transformer tank and the transformer marshalling Kiosk. Care shall be taken during handling of insulating oil to prevent ingress of moisture or foreign matter. In testing, circulating, filtering or otherwise handling of oil, rubber hoses shall not be used. Circulation, filtering of oil, heating of oil by regulated short-circuit current during drying runs, sampling and testing of oil shall be in accordance with the Manufacturer's instructions and relevant Code of Practice. cable

Client Project: Title:

ADWEA STANDARD SPECIFICATIONS FOR WATER WORKS SPECIFICATION FOR ELECTRICAL INSTALLATIONS

tender:

project:

document: W-E-SS-013

rev: 0

sheet: 12

of: 50

8.4

Battery and Charges
Installation and testing of battery & charges shall be done in compliance with the manufacturer's instructions. Each cell shall be inspected for breakage and condition of cover seals as soon as it is received at site. Battery shall be set up on racks as soon as possible after receipt, utilising lifting devices supplied by Vendor and not by their terminals. Contact surfaces of battery terminals or interconnectors shall be cleaned, coated with protective grease and assembled. Each connection to be properly tightened. Battery shall be connected to rectifier and to be fully charged.

8.5
8.5.1

Cable Installation
General
The scope of work includes but not limited to : Detailed design including cable sizing, cable schedule preparation of cable routing, tray arrangement, road crossing detail drawing. Supply of all required cables and accessories. Installation of all electrical Power and Control Cables necessary for the satisfactory completion and proper and safe operation of the entire electrical system. The work includes storing, laying, fixing, jointing/termination, testing, commissioning and any other work necessary for completing the job. Supply and installation of required Cable Glands and Accessories, Cable Lugs, Jointing and Termination Kits, etc. Supply and installation of all required Cables Trays and Accessories, Conduits, Supports, Fixing Materials, etc. Any minor civil works such as openings on walls, beams and slabs and cutting or chipping of floors, etc. Excavation of cable trenches for burying electrical cables under sand, asphalted or tiled road crossing or paving and reinstating the same to the satisfaction of ADWEA/ENGINEER. Cable trenches shall be hand excavated. Providing all required cable protection tiles, warning tapes and route marker over buried cables.

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The CONTRACTOR shall furnish all supervision, labour, tools, welding equipment, craneage, shackles and testing equipment required for installation work. Cables and their accessories for termination and jointing shall be generally selected from standardized types and sizes.

Client Project: Title:

ADWEA STANDARD SPECIFICATIONS FOR WATER WORKS SPECIFICATION FOR ELECTRICAL INSTALLATIONS

tender:

project:

document: W-E-SS-013

rev: 0

sheet: 13

of: 50

The CONTRACTOR shall execute the installation work as per detailed documents / drawings prepared by CONTRACTOR and approved by ADWEA/ENGINEER. All electric power, control and auxiliary cables shall be numbered accordingly in a logical way for easy identification. Cable numbers shall be listed in the project's cable list, stating type, voltage grade and size of cable, route length, and destination "from/to" etc. The cable installation shall conform to good working practice of high quality and safety. Provisional or temporary cable work, required during erection of permanent installations, shall also comply with the basic rules for design and engineering. The cable system installation work shall comply with the latest IEC/BS applicable standards, regulations and safety codes. Nothing in this specification shall be construed to relieve the CONTRACTOR of this responsibility. Cable types and sizes shall be determined according to their required duties and loads, in particular, taking into account the following: Possibility of soil contamination and chemical attack. Voltage drop and short-circuit level. Heat dissipation aspects (ambient air temperature of 55 deg.C). Soil resistivity method of installation (air, burried underground, ducts etc) Depth of burial Grouping factor etc.

All cables laid by the CONTRACTOR shall be terminated at both ends to switchgear, panel equipment, local push button, instruments or junction/marshalling boxes terminals as the case may be. The scope of termination at each end shall include dressing and connection of all the cores of the cables after proper glanding of the cable on the switchboard, junction boxes, etc. In cases where the cable sizes selected are larger than the glands on terminal boxes or the terminals on the equipment, CONTRACTOR shall provide a suitable adaptor or connect to junction boxes adjacent to the equipment and from the junction box connect a cable of suitable size to the equipment. Spare cores of control cables shall be connected to spare terminal blocks where available, with appropriate ferrules. If there are no spare terminal blocks, the spare cores shall be bunched together and kept neatly inside the panel.

Client Project: Title:

ADWEA STANDARD SPECIFICATIONS FOR WATER WORKS SPECIFICATION FOR ELECTRICAL INSTALLATIONS

tender:

project:

document: W-E-SS-013

rev: 0

sheet: 14

of: 50

8.5.2

Above-ground Cabling
Cables in the electrical switchgear and control rooms shall mainly run in cable trays fixed in the covered concrete trenches in the floor. Where necessary cables shall be supported by sheet steel galvanized cable tray supports with removable top covers allowing adequate ventilation, or by covered GRP cable trays, as directed and approved by the ADWEA/ENGINEER. The scope of cable tray installation shall include the installation of all associated accessories like coupler plates, elbows, drop-outs, tees, bends as required. Cable or cable supports shall never be fixed directly or indirectly to equipment or piping, which may be subject to removal or replacement. Individual cables emerging from floors or soil shall be protected against mechanical damage by means of coated steel pipes or rigid PVC pipes to an adequate height above the ground. Control and power cables shall be run in separate trays with adequate spacing. All materials used shall be protected against corrosion. Metal parts of the cable racks and trays shall be connected to the common earthing grid. The CONTRACTOR shall carry out earthing of cable trays at distances not exceeding 10m length by means of cable of minimum size 25 mm².

8.5.3

Underground Cabling
Cables shall be buried directly in the ground at a depth of minimum 90 cm, in a bed of well compacted soft sand. A further layer of 10 cm of soft sand to be put above the cables, before putting the excavated backfill materials i.e. clean sand or soil. All underground cables shall be covered by concrete or PVC tiles, and further protected with an approved plastic warning tape, inscribed in English and Arabic. Where cable trenches cross roads, cables shall be protected by suitable uPVC ducts of not less than 100 mm dia. and encased in mass concrete. All underground cables shall be identified with their cable numbers all along their routes by means of non-corroding tags at every 25 meters. Surface marker posts shall be installed to mark the route of the cables. Where cables are to be buried in existing cable trenches, care should be taken not to damage the existing cables, cable tiles and route markers. After laying the new cables, all existing cable tiles and route markers shall be replaced in their proper positions and new plastic warning tape shall be installed along the route. Any broken tiles or route markers shall be replaced by CONTRACTOR.

Client Project: Title:

ADWEA STANDARD SPECIFICATIONS FOR WATER WORKS SPECIFICATION FOR ELECTRICAL INSTALLATIONS

tender:

project:

document: W-E-SS-013

rev: 0

sheet: 15

of: 50

The CONTRACTOR's scope of construction work for directly buried pipes/conduits shall be excavation and back filling as per varying depths/widths required in project drawings. Cable jointing wherever necessary and approved by ADWEA/ENGINEER shall be carried out by CONTRACTOR using required special tools, incidental accessories. These joints shall be then subjected to HV pressure testing. Cables shall be protected by insulating heat shrinking caps at all times from mechanical injury and from absorption of moisture at unprotected ends. Damaged cables shall be replaced at the CONTRACTOR's expense. Sharp bending and linking of cables is not allowed. The bending radii for the various types of cables shall not be less than those recommended by cable vendor. Where cables cross water/oil/gas/sewage pipes, they shall be run in uPVC/steel pipes and the depth of burial shall not be less than 600 mm unless specifically approved otherwise at site by ADWEA/ENGINEER. When power cables are laid in the proximity of communication cables the distance of separation shall not be less than 400 mm for single-core cables and 300 mm for multi core cables. Power and communication cables shall not cross at right angles to each other. All excavation shall be done by hand excavation. Cable trenches in open ground shall not be less than 1000 mm deep and width as specified in drawings so as to accommodate all cables. Materials/equipment required to safeguard the trench and adjoining structure, road construction and paving shall be supplied and positioned by CONTRACTOR. Where buried cables crosses roads they shall be installed in uPVC pipes with 150 mm diameter minimum. These pipes shall be embedded in concrete of 350 mm thickness. Where such pipes are installed, they shall be extended at least 1000 mm on each side of the marked crossing. The pipes shall be installed at a minimum depth of 850 mm below ground level. At road crossing the CONTRACTOR shall confirm that there are no obstructions buried under the road surface at the place intended for the road crossing. The CONTRACTOR shall excavate only half a road width and not more than one road at a time. Any timber/plates needed for bridging the cable trench will be supplied by the CONTRACTOR. Any excavation/obstruction that can constitute a hazard or danger to personnel or the public should be fenced off/covered over and warning boards positioned. At night warning lights should be placed around the excavation/obstruction. Excavated material which is surplus to the requirement for filling shall be disposed of in soil dumps or be removed form site as directed by ADWEA/Engineer.

Client Project: Title:

ADWEA STANDARD SPECIFICATIONS FOR WATER WORKS SPECIFICATION FOR ELECTRICAL INSTALLATIONS

tender:

project:

document: W-E-SS-013

rev: 0

sheet: 16

of: 50

8.5.4

Conduits and Pipes
The CONTRACTOR shall install all conduits/pipes required for the cable work as and where required.

Conduits/pipes shall be laid buried in ground, laid along the walls/structural members, along floors and ceilings as and where required. All conduits/pipes shall have their ends closed by caps until cables are pulled. On walls, beams, etc. water-proof sealing shall be applied to any conduit pipe penetration. Inserts by means of bell mouth termination pieces and bitumen based cold set water - proof compound may be used. Fire proof sealing shall be applied for pipe inserts in floor slabs. The scope of installation of conduits/pipes as indicated above includes supply and installation of all accessories like tees, elbows, pull-boxes, conduit end plugs, bell mouths, steelwire for cable pulling, saddles spacers etc.

8.6

Electrical Variable Speed Drive System (EVSDS) Installation
The storage and installation of the components of the EVSDS shall be in accordance with the relevant codes and the manufacturer's instructions. CONTRACTOR shall take proper care while handling and interconnecting the parts of each frequency converter panel. Also loose instruments shall be fixed and connected by the proper wires provided at the back of the panels. SWITCHGEAR/MCC UPS AND DC SUPPLY PANELS These panels shall be installed in accordance with specified Code of Practice and the VENDOR's instructions. These shall be installed on finished surfaces or concrete or steel sills. The CONTRACTOR shall be required to install and align any channel sills which form part of the foundations. In joining shipping sections of the switchgear/panels/control centres together, adjacent housing or panel section provided shall be bolted together after alignment has been completed. Power bus, enclosure, ground and control splices of conventional nature shall be cleaned and bolted together, be drawn up with torque wrench of proper size or by other approved means. Tape or compound shall be applied where called for by the VENDOR's drawings. Any additional I sections/channels required to install the base of the Switchgear shall be welded to the existing iron mongrels available in the floor opening for suitable installation of the Switchgear. Additional floor openings available shall be suitable checkered plated by MS plates at top and bottom. The entire bottom side of the floor opening shall be closed by MS/AL plate of 4 mm thick, suitably bolted to the floor channel to provide vermin protection to the switchboards.

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The CONTRACTOR shall take utmost care in handling instruments, relays and other delicate mechanisms. Wherever the instruments and relays are supplied separately, they shall be mounted only after the employed for the safe transit of the instruments.

8.7
8.7.1

Earthing System Installation Works
Scope
This specification details broad guidelines for installation and testing of the earthing system. The earthing installation works shall comply with the latest IEC/BS standards. Nothing in this specification shall be construed to relieve the CONTRACTOR of his responsibility to comply with the relevant standards and codes of practice.

8.7.2

Methodology for Installation
The enclosure of electrical switchgear distribution boards, transformers, frequency converters, motors, etc. shall be earthed through earth wire of proper size. The neutral of transformer shall be separately earthed through dedicated earth pits. All auxiliaries/loads fed from the switchgear, and distribution boards shall have an earth continuity wire. The size of the earth wire shall be as per IEE/BS regulations. Earth electrode shall be copper rods of 20 mm diameter. Necessary electrode length shall be driven so as to reach the water bed. The earthing resistance in any case shall be restricted to 1 ohm. Earth pit shall be of standard concrete enclosure with cover. Earth pit may be treated with bentonite if the soil resistivity's more than 20 ohm meter. All new installation in existing plants shall be seperately earthed and then connected to the existing plant earthing system.

8.7.3

Equipment & Structure Earthing
Earthing pads/terminals shall be provided by the CONTRACTOR to equipment at accessible positions. The connection between earthing pads/terminals and the earthing grid shall be made by short and direct earthing leads free from kinks and splices. Steel/RCC Columns, doors, and any other metallic structure shall be connected to the nearby earthing grid conductor by one earthing lead. Electrical conduits, pipes and cable tray sections shall be bonded to ensure electrical continuity and connected to earthing conductors at regular intervals. Apart from intermediate connections, end and beginning points shall also be connected to earthing system. Metallic conduits and pipes shall not be used as earth continuity conductor.

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A separate earthing wire shall be provided for earthing lighting fixtures, receptacles, switches, junction boxes, lighting conduits, poles, etc. This earth wire in turn will be connected to the main earth bus in the lighting panel/distribution board. Miscellaneous items such as junction boxes, switches, cable, boxes/glands, fittings and fixtures shall be earthed whether specifically shown or not. Flexible earthing connectors shall be provided where flexible conduits are connected to rigid conduits to ensure continuity.

8.7.4

Jointing
Earthing connections to equipment earthing pads/terminals shall be bolted type with GI bolts and nuts. Contact surfaces shall be free from scale, paint, enamel, grease, rust or dirt. Two bolts shall be provided for making each connection. Equipment bolted connections after being checked and tested, shall be painted with anti-corrosive paint/compound. Connection between equipment earthing lead and main earthing conductors and between main earthing conductors shall be bolted/thermowelded/brazed type. For rust protection, the welds should be treated with red lead primer and thickly over-coated with bitumen compound to prevent corrosion. Resistance of the joint shall not be more than the resistance of the equivalent length of the conductor. Welding/brazing surfaces shall be cleaned and made free of all oxide films, grease, oil or resin material. However, the jointing surfaces should not be made too smooth/highly polished to prevent the jointing metal from flowing away. The items to be welded/brazed shall not be clamped/tied tightly (at the same time clearance should not be excessive), to allow the flux/alloy to run freely through the joint and alloy itself with the surfaces to be joined together. All brazing shall be done by oxy-acetylene torch flame. All welded connections shall be made by electric arc welding. All welded joints shall be allowed to cool down gradually to atmospheric temperature before putting any load on it. Artificial cooling shall not be allowed. Bending of large diameter rod/thick conductors shall be done by gas heating. All arc welding with large dia. conductors shall be done with low hydrogen content electrodes.

8.7.5

Cable Earthing
Metallic sheaths and armour of all multicore cables shall be earthed at both equipment and switchgear end.

9.

FIELD INSPECTION AND TESTING
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9.1

General
Before the electrical facilities are put in operation, the CONTRACTOR shall make suitable tests to establish that all equipment, devices, and wiring have been correctly installed in satisfactory working condition and will operate as intended. At least two (2) months before field testing begins, the CONTRACTOR shall submit for review by ADWEA/ENGINEER a list of minimum acceptable test values and procedures, to be followed. Values shall conform to those specified in international standards (IEC/BS) or manufacturer's instructions approved by ADWEA/ENGINEER. Inspection test forms for testing of various types of equipment are included under Annexure 1. These forms are typical examples. CONTRACTOR shall submit to ADWEA/ENGINEER his test forms incorporating all required tests inclusive of the manufacturer recommended checks/test or any other tests as per standard practice. Some of the standard test requirements are also listed below.

9.2
9.2.1

Motor Tests
Insulation resistance and run-in
Insulation resistance of all motor windings shall be measured before connecting power cables to motors. Measurements shall be repeated after power cable terminations are completed. All main motors shall run uncoupled for a minimum period of 4 hours before driven equipment is placed in regular service. The 4 hour period may be interrupted but shall include a minimum continuous run of 2 hours. The insulation resistance of the motor winding shall be measured taking readings at the end of 30 seconds and again at the end of 60 seconds after the 4 hour period motor run.

9.3

Grounding Resistance Tests
The resistance to earth shall be measured and shall not exceed the valves as per the following: The resistance to earth of an earthing system or earth mat shall be test with the external cabling disconnected. The resistance of each separate system shall be lower than : 1.0 ohm for electrical system and equipment earthing 4.0 ohm for non-electrical equipment earthing.

Inspection of earthing is included in Form 2 of Annexure 1.

9.4

Transformer Tests
Transformers shall be checked for but not limited to the following: Visual inspection

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-

Nameplate data including rated primary and secondary voltage, current, frequency, kVA rating, vector group, enclosure protection, mass of oil etc. Insulation resistance checks Continuity checks Earthing checks Protection relays and instruments for breathing type, oil and silica gel tests etc.

-

9.5

11 kV and L.V. Switchgear Tests
11 kV and L.V. switchgear boards shall be subjected to the following inspection /checks: Visual inspection/checks Mechanical checks CT ratio and polarity tests Relay checks/testing as per vendor data and required settings Functional check for interlocks

9.6

Electrical Variable Speed Drive System Tests (EVSDS)
The EVSDS system shall be tested in accordance with the relevant codes and manufacturer's recommendations: The tests/checks shall include but not limited to the following: visual inspection name plate data caliberation/adjustments check for proper speed up during start and slow down when stopped. linearity input signal (4-20 mA) and motor rpm. no pulsating torques at low speed. measurement on the input/output of converter and at the motor side viz. current, voltage, power, frequency etc.

-

9.7

DC Supply System and Uninterruptible Power Supply (UPS) Units
Installation and testing of DC supply system and UPS units shall be done in strict compliance with the VENDOR's instructions and all requirements as per Inspection Forms attached.

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9.8

Cable Installation Tests
During installation of cables the cable runs will be inspected by ADWEA/ENGINEER. Backfilling of cable trenches is only allowed after inspection of ADWEA/ENGINEER. Final inspection of the installed cabling system and testing shall be carried out with the presence of ADWEA/ENGINEER. The required tests and checks shall include: Visual Inspection Insulation Resistance Check by 1000V Megger. HV pressure tests for 11kV cables.

The procedure and test equipment to be used shall be proposed by CONTRACTOR and approved by ADWEA/ENGINEER prior to commencement of testing. Insulation resistance test of each cable length, sizes and type shall be recorded for ADWEA/ENGINEER's approval. If any length of cable is found to have unsatisfactory results after inspection and testing, it will be rejected. Type, size and quantity of cable glands shall be inspected and recorded. It is the CONTRACTOR's responsibility to ensure that the installation work comply to the latest applicable codes of practices and Fire Insurance Regulations and Standards.

9.9

Wiring Insulation Tests
Insulation resistance of each circuit shall be measured before energizing (with neutral ground disconnected) as follows: Line(s) to neutral Line(s) to ground Neutral to ground Test scheduling shall minimize disconnection and

Circuit testing shall be as follows. reconnection. -

Motor feeders are tested with motors disconnected and controller open. Motor control circuits are tested with control stations and overcurrent devices connected, from phase to ground only. Lighting feeders are tested with breaker open and lighting panel/distribution board connected. Lighting branch circuits shall be tested with switch closed but all lamps or bulbs of light fittings removed.
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For circuits fed with auto-transformer type ballasts, the only reading possible will be from line or neutral to ground. If fixture with power factor correcting capacitors connected, line-to-line are involved, it may be necessary to disconnect them to avoid capacitor overvoltage.

9.10

Lighting and Small Power Systems Tests
Before start-up the CONTRACTOR shall measure the illumination levels in the various areas to check if they meet the levels required in this specification. The required illumination level shall be based on CIE Publication 'Guide on Area Lighting'. The CONTRACTOR shall prepare a test report about the inservice and initial illumination levels. All power sockets shall be tested for polarity phase sequence and loop impedance.

9.11

Functional Tests
After testing of individual equipment/materials, functional test shall also be carried out to confirm: proper sequence of operation interlocks and alarms any other specified requirements

9.12

Measurement of Harmonic Levels
CONTRACTOR/Vendor shall carry out measurement of harmonic levels to confirm and prove to ADWEA/ENGINEER that when all the pumps and other equipments for the project are fully loaded, the total harmonic levels are not exceeding the specified levels. In case the values are unacceptable to ADWEA/ENGINEER, additional approved equipment/devices shall be installed by the CONTRACTOR/Vendor without any additional costs to the ADWEA.

10.

ACCEPTANCE OF WORK
Electrical work shall only be accepted after the complete newly installed electrical system is in proper operation and all electrical equipment are working satisfactorily to the satisfactions of ADWEA/ENGINEER. The normal acceptance procedure shall include handing over of all records made in the construction period such as test results, instruction manuals, "as-built" drawings etc.

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ANNEXURE 1
11. INSPECTION FORMS
The following inspection forms are included as typical examples. CONTRACTOR shall incorporate these requirements as well any other specific requirements in suitable test forms and submit for prior ADWEA/ENGINEER's approval before the commencement of the testing and commissioning works. CONTRACTOR shall also submit additionally test forms for special equipments (e.g. Frequency Converters) based on manufacturer's recommendation for ADWEA /Engineer approval: Form No. Basic inspection - electrical equipment Inspection switch houses Inspection of bus-bar assembly - HV switchgear Inspection switching units - HV switchgear Voltage transformer (and UV relay) test Current transformer (and ammeter) test Overcurrent/earth-fault protection relay (induction type) test Overcurrent/earth-fault protection relay (thermal type) test Differential protection relay test Inspection of bus-bar assembly - LV switchgear Inspection of outgoing unit - LV switchgear LV overcurrent/earth-fault protection relay test Inspection of power transformer Inspection of electric motor - Cage-induction type Inspection of static supply unit Inspection of lighting installation Inspection list lighting fittings/receptacles Inspection of distribution feeder cable 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

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Form No. 1 BASIC INSPECTION - ELECTRICAL EQUIPMENT
Type of equipment: ……………………………………………… Location : …………………………………………...

System voltage : ………………………………………………… Size/rating : ……………………………………………….……… 1. Compare nameplate information with equipment record. Note any deviations under remarks.

Unit No. : ………………….....….…………………. Registration No. : …………..………………………

2. Establish and record the following: 1. Equipment/circuit identification 2. Area classification 3. Type of Ex-protection/gas group/temperature class 4. Type of enclosure protection 5. Electrical protection setting/rating 6. Actual maximum load /ammeter reading …………………… …………………… …………………… …………………… …………………… ……………………

3. Check the following items and report any deviations/defects under remarks: 1. Labelling correct 2. No unauthorised modifications 3. Enclosures and glasses satisfactory 4. Seals and gaskets satisfactory 5. Bolts and glands complete and tight 6. No undue accumulation of dust and dirt 7. No leakage of oil/compound 8. No damage to aboveground part of connected cables 9. Adequate protection of equipment and cables against corrosion, the weather, vibration and other adverse factors 10. Motor fans and couplings not rubbing on cowls/guards 11. Earthing in good condition 12. Oil levels in sight glasses correct 13. Padlock facilities correct 14. Silica gel in breathers satisfactory …………………… …………………… …………………… …………………… …………………… …………………… …………………… …………………… …………………… …………………… …………………… …………………… …………………… ……………………

4. Remarks

Inspector : ……………………………… Date : ……………………………………

Remedial action completed:

Supervisor : ……………………....……. Date : ……..…………………….……….

Approval : CONSULTANT : ..………………..………… ADWEA : …….……………………….

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Form No. 2
Page 1

INSPECTION OF SWITCH HOUSES (including transformer yards)
Location : ……………………………………………….………… Station No. : ………………………………………..

NOTES : - Tests marked (C) and (M) are required for pre-commissioning and maintenance inspections only. - Report deviations/defects/missing items under remarks.

1. Record on tidiness and general condition of station and yard :………………………………………………...……………. ………………………………………………………………………………………………………………………………………...

2. Check the following items : Station exterior : 1. Has the station been numbered and fire-fighting instructions and danger signs been provided Is the station equipment complete with: 2. First aid/electrical shock treatment directions 3. Any instructions required by local authority 4. Key diagram of main power system 5. Single line diagrams of switchboards 6. Schematic/wiring diagrams of switchboards 7. lackboard and or log book 8. Sufficient caution and danger notices and spare fuses 9. If a telephone is provided: appropriate telephone list 10. Fire extinguisher……………………State type:CO2/ BCF 11. Special operating tools/ earthing equipment Proper operation of : 12. Doors, door-locks and panic bars (if fitted) 13. Lighting, socket outlets, emergency lighting …………………… …………………… ………………….. …………………… …………………… …………………… …………………… …………………… …………………… …………………… ………………… ………………… …………. ………

3. Tripping rectifiers/batteries Check for: level of electrolyte Corrosion on cells

No. 1 …………… ……………

No.2 ………… …………

Measure battery voltage: on trickle charge on quick charge Under load …………… …………… …………… ………… ………… …………

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Form No. 2
Page 2

4. Earthing electrodes : Check earthing pit for : Corrosion Tight connections ………… ………… ………… ………… ………… ………… ………… …………

Measure earthing resistance ( C) (M) ………… ………… ………… ………… ohm

5. Remarks

Inspector : ……………………………… Date : ……………………………………

Remedial action completed:

Supervisor : ……………………....……. Date : ……..…………………….……….

Approval : CONSULTANT : ..………………………. ADWEA : …….………………………..…

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Form No. 3
Page 1 INSPECTION OF BUS – BAR ASSEMBLY - HV SWITCHGEAR

Location:………………………………………………………………………………………………………………………………… Switchboard No.:…………………………………………………… Manufacturer:………………………………………………………. System voltage:……………………………………………………. Section:……………………………………………... Purchase No.:……………………………………… Rating:……………………………………………….

NOTE: Tests marked (C) are required for pre-commissioning inspection only.

1. HV pressure test – bus-bar system (C) Test voltage DC 75% : ……………………kV 100% : ..…………………kV Leakage R………… R………… cuuent S………… S………… mA Tester used :

T………… T………… ………………

2. Insulation resistance test – bus-bar system Test voltage level …………….V DC Phase R ………………… S ………………… T ……………………Mohm Tester used : ….……………

3. Conductivity test – bus-bar system (C) Spout to spout Unit No. R S T 1-2 ………… ………… ………… 3-4 ………… ………… ………… 5-6 ………… ………… ………… 7-8 ………… ………… ………… 1-8 ………… ………… ………… …………….. Ducter meter used

4. Earthing system : Check the condition of earthing bar and connections Measure the continuity of earthing bar to main earth …………………… ……………………

5. Voltage transformer test (including UV- relay and voltmeter) *Sheet No. …….………………………

* NOTE:

Form Nos. 1 and 5 will be used to carry out these tests but the forms may be given sheet numbers when they make up a set of inspection documents for a particular item of equipment. e.g. Inspection of bus-bar assembly – HV switchgear Requires: Form 3 – becomes sheet 1 Form 5 – becomes sheet 2 Form 1 – becomes sheet 3

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Form No. 3
Page 2

6. Basic inspection completed * Sheet No.

……………………………… ………………………………

7. Remarks

Inspector : ……………………………… Date : ……………………………………

Remedial action completed:

Supervisor : ……………………....……. Date : ……..…………………….……….

* See Note on Form No. 3-page 1

Approval : CONSULTANT : ..……………………………. ADWEA : …….……………………

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Form No. 4
Page 1

INSPECTION SWITCHING UNITS – HV SWITCHGEAR

Location :……………………………………………………………………………………..……..…………………………………………….. Switchboard No. : …………………………………………… Panel No. : …………………………………………………… Switching device : Type ……………………………………. Manufacturer : ……..……………………………………….. Function : ….………………………………………………… Rating : …………………………………………………………

1. Record the reading of the operations counter

………………………………………………………………………………...

2. Check the following items and report any deviations/defects under remarks: 1. Circuit labelling correct 2. Operation of safety shutters 3. Padlocking facilities 4. Interlocking facilities, mechanical/electrical 5. Mechanical position indicators, indicating lights 6. Insulating bushings and barriers 7. Cable box and terminations 8. Alignment of main and auxiliary contacts 9. Mechanical closing and tripping 10. Electrical closing, local / remote 11. Electrical tripping, local / remote 12. Alarm indications, local / remote 13. Anti-condensation heater test insulation resistance at 500 V …………………… …………………… …………………… …………………… …………………… …………………… …………………… …………………… …………………… …………………… …………………… …………………… ……………………

14. Secondary and auxiliary wiring test insulation resistance at 500 V ……………………

3. Earthing : Check the condition of earthing bar and connections …………………………………………………………………………… Test the earthing bar continuity ……………………………….…………………………………………………………….mohm

4. Record fuse type / rating………………………………………………………………………..

5. HV pressure test – circuit breaker (for pre-commissioning inspection only) Test voltage DC 75% : ……………………kV 100% : ..…………………kV Leakage R………… R………… cuuent S………… S………… mA Tester used :

T………… T………… ……………………

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Form No. 4

Page 2

6. Insulation resistance – Circuit breaker : Test voltage level …………….V DC Phase R ………………… S ……………… T ……………………Mohm Tester used : ………….……………

7. Conductivity test – Circuit breaker : Phase R ………………… Phase S ………………… Phase T …………………

Ducter used ……………………

8. For oil circuit breakers : Check the oil condition, oil test result For vacuum circuit breakers/ contactors : Check on loss of vacuum by high- voltage test across open contacts (refer to manufacturer's instruction) test voltage ……………………………………Kv Leakage current ……………………………… mA ………………………………………………………..

9. Current transformer test completed

……………………………………………………….. Sheet No. …………………………………………..

Protection relay test completed

……………………………………………………….. Sheet No. …………………………………………..

10. Remarks

Inspector : ……………………………… Date : ……………………………………

Remedial action completed:

Supervisor : ……………………....……. Date : ……..…………………….……….

Approval : CONSULTANT : ..……………………………. ADWEA : ……………...……………

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Form No. 5
Page 1

VOLTAGE TRANSFORMER ( and UV relay ) TEST

Location:………………………………………………………………………………………..………………………………………………….. Switchboard No.:………………………………………………… Voltage transformer: Type:………………………………………….. Ratio:………………………………………….. Section/panel No.:…………………………………………….. Function:……………………………………………………….. Serial No.:……………….……… Vector group:…………………… Class:……………………………………. VA rating:…………………………………

NOTE: Tests marked (C) are required for pre-commissioning inspection only.

1. Record the fuse rating

……………………………………………………………..A

2. Check the following items - note deviations/defects under remarks : mechanical damage – alignment of contacts tight connections – star- point earthing locking arrangement – core marking for oil-immersed transformers – oil test result …………………… …………………… …………………… ……………………

3. Insulation resistance tests : secondary wiring : at 500- V DC : secondary winding: ( primary winding earthed) at 500-V DC: Phase to phase R-S………… Phase to earth R-S………………… Phase to phase Phase to earth S-T………………… S-E………………… Phase to phase T-R……………Mohm Phase to earth T-E..…….……Mohm ……………………….Mohm

primary winding: ( secondary winding earthed) up to 4.6 kV: at 2500 V – above 4.6 kV: at 5000-V DC Phase to phase R-S……………… Phase to earth R-S………………… S-T…………… S-E……………… T-……….……Mohm T-E.……..……Mohm

Temperature : …………………...…..°C

4. Test VT polarity by battery flick test (C) R…………………… S……………………… T……………………

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Form No. 5
Page 2

5. After energising : measure the VT secondary voltage Phase to phase R-S………………… Phase to earth R-S………………… S-T………………… S-E………………… T-R…………… V T-E..…….……. V

check phase rotation ……………………………. (C) voltmeter reading : sec. voltage ……..…………………………… V Meter reading ………………………………… kV

6. Under voltage relay : Manufacturer ……………………………………….. Drop – off Type ………………………………………………. Pick – up

Setting range

……………… V

……………… V

Selected setting

……………… V

……………… V

Measured value

……………… V

……………… V

Remarks

Inspector : ……………………………… Date : ……………………………………

Remedial action completed:

Supervisor : ……………………....……. Date : ……..…………………….……….

Approval : CONSULTANT : ..……………………………. ADWEA : ……………….……………

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Form No. 6
CURRENT TRANSFORMER ( and ammeter ) TEST Location : ……………………………………………………………………………………..………………………………………... Switchboard No. : ………………………………………………… Current transformer : Serial Nos. : ……………………………………………………… Type : bar/wound Panel No. : …………………………….…………… Function:……………………………………………. Class : ………………………………..…………….. Ratio:……………… VA rating:………..

NOTE: Tests marked (C) are required for pre-commissioning inspection only.

1. Check the following items : mechanical damage – tight connections star point connection and earth link …………………… ……………………

2. Insulation resistance test : Secondary winding at 500 V : Phase to earth R-E ……………… S-E ……………… T-E ……………… mohm

3. Resistance test secondary circuit (C) (including transformer winding) : R………………… S………………… T………………… mohm

4. Test CT polarity by battery flick test (C) R………………… S………………… T………………… mohm

5. Ratio test ( C ) (to be combined with relay testing, if required) Phase Primary current Secondary current Ammeter readi.. R ……………… ……………… ……………… S …………………. …………………. T ………………….. A ………………….. A

………………….. …………………… A

Remarks

Inspector : ……………………………… Date : ……………………………………

Approval : CONSULTANT : ..……………………………. ADWEA : …….……………………..

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Form No. 7
OVERCURRENT / EARTH-FAULT PROTECTION RELAY( including type ) TEST

Location : ………………………………………………………………………………………..……………………………………... Switchboard No. : ……………………………………………….…… Relay: Overcurrent inverse time. Manufacturer : ..………………. Type:…………….……… Current setting range : …………………………………………..…. Time setting range : ……………………………………………….. CT ratio : ………………………………… Selected setting : ….…………………………… A Selected setting : ….…………………………… % Panel No . :………………………………………….

Test setting Current A Time %

Injection current Primary x In A Secondary A

Trip time Seconds Curve
2

Remarks Phase…………………

Actual

) Measure and insert Minimum relay

Secondary Injection S S S S 100 100 100 100
1

)……….

NA NA NA NA

…………… …………… …………… ……………

NA ………… ………… …………

NA ………… ………… …………

operating current at ) NOTE: The trip time curve will be supplied by the manufacturer
2

1

1.3x 2x 4x

Primary Injection S S S S 1.3x 2x ………… ………… …………… …………… …………... …………... …………... …………... For pre-commissioning Inspection only.

Check correct reset action Check correct trip action Check correct flag operation

…………………………………………………………………………………………… …………………………………………………………………………………………… ……………………………………………………………………………………………

NOTE: S = preferably at selected setting

NA= not applicable

Values to be filled in for each over current and earth-fault element

Relay setting after test : Instantaneous element Current setting Time setting Adhesive label provided ………………………………….. A ………………………………….. A ………………………………….. % …………………………………..

Remarks

Inspector : ……………………………… Date : ……………………………………

Approval : CONSULTANT : ..……………………………. ADWEA : …….………………………

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Form No. 8
OVERCURRENT / EARTH-FAULT PROTECTION RELAY (thermal type) TEST

Location : ………………………………………………………………………………………..……………………………………... Switchboard No. : …………………………………………………… Relay: Motor protection relay Manufacturer : P & B Tripping setting range: 80 – 150% Tap settings: 80-90-100% Motor FLC : ………………………………………………………. A Secondary injection test Nominal injection current Is = tap setting x rated current = …………………………………………….A Type : ………………… Panel No. : …………………………………………. Relay Rated current: : ..………………………………. A Selected setting : .……………………..……..…% Selected setting : .……………………..……..…% CT ratio: ………………………………………… A

Injection current x Is 4x 2x 4x A …………… …………… ……………

Operating temperature Cold Warm Warm

Trip time Curve * …………… …………… …………… actual …………… …………… ……………

All three phases connected in series.

Load to trip setting 105%.

1x

……………

Warm

Running load indication ……………………………………………….. %

Instantaneous elements: Short circuit/earth fault Fuse rating ……………………………………. Setting …………….…………………. X In = ………………..………….. A

Measure pick - up current Primary injection test ( for pre-commissioning inspection only )

…….……………………..……………….. A

Injection current = 100 % FLC = ……………………….…. A Running load indication = …………………………...%

Relay setting after the test : Tap setting …………………..% Load to trip …………………..% Inst. Setting ……………...……..x In …………………………………. Adhesive label Provided

* NOTE: Trip time curve will be supplied by the manufacturer

Remarks

Inspector : ……………………………… Date : ……………………………………

Approval : CONSULTANT : ..……………………………. ADWEA : …….………………………

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Form No. 9
DIFFERENTIAL PROTECTION RELAY TEST

Location : …………………………………………………………………………………..………………………………………….. Switchboard No. : ……………………………………………………. Relay : CT ratio: side 1…………………….……………... Manufacturer: ……………………… Type: ………………… CT ratio: side 2…….…………….……………….. Selected setting:….………………………………. Selected setting:….………………………………. Panel No. ……………………………………...….

Current setting range: ……………………………………………… Time settings range: ………………………………………………..

Recommended for: Pre-commissioning tests Maintenance tests On-stream tests 1. secondary current tests : sensitivity test : at max. setting at min. setting at selected setting - stability test : at 100% nom. Current at 500% nom. Setting 2. primary current tests : sensitivity test (supply from test set) at selected setting - stability test (supply from test set) at actual load or 100% nominal current for generators

C M O

…………….. …………….. ……………..

………….. ………….. …….……..

NA NA …………….

……………. …………….

NA NA

NA NA

……………..

NA

NA

……………..

…………….

NA

Check correct reset action Check correct trip action Check correct flag operatin

……….…… ……………. …….………

……………. …………….. ……………..

……..……. …………… …………..

Relay setting after test: Current setting Time setting Adhesive label provided Remarks …..………………….… A ………………………… ………………………… Inspector : ……………………………… Date : ……………………………………

Approval : CONSULTANT : ..……………………………. ADWEA : …….……………………..

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Form No. 10
Page 1

INSPECTION OF BUS-BAR ASSEMBLY – LV SWITCHGEAR (including incoming and sectionalizer units)

Location : …………………………………………………………………………………………………………….…………………………… Switchboard No. : ……………………………………… Manufacturer: ………………………………………….. …………………………………………………. System voltage: ……………………………………….. Rating: ……………………………………………………….... Section: …………………………………………….………….. Purchase No.:

NOTE: Tests marked (C) are required for pre-commissioning inspection only.

1. Insulation resistance test – bus-bar system at 500-V DC Phase R……………… Phase S……………… Phase T…………… Mohm

Tester used ..………………….

2. Conductivity test – bus-bar system (C) Spout to spout Ducter Used: Unit No. R S T Incomer 1 ………… ………… ………… 2-3 ………… ………… ………… 4-5 ………… ………… ………… 6-7 ………… ………… ………… Incomer 7 …………… …………… …………… …………………… mohm

3. Earthing system : Check the condition of earthing bar and connections Measure the continuity of switchboard to main earth …………………………………….mohm …………………………………….mohm

4. Current transformer test (including ammeter) Completed – Form No. 6 5. Basic inspection completed – Form No. 1 Sheet No. …….………………………… Sheet No ………………………………..

6. After energizing Check voltmeter reading : Check phase rotation ( C ) : Remarks …………………………….. ……………………………….. Inspector : ……………………………… Date : ……………………………………

Approval : CONSULTANT : ..……………………………. ADWEA : …….……………………

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Form No. 11
INSPECTION OF OUTGOING UNIT – LV SWITCHGEAR

Location : ………………………………………………………………………………………..………………………………………………... Switchboard No. : …………………………………………… Panel No. : …………………………………………………… Switching device: Type……………………………………… Manufacturer :………………………………………………... Function : ……………………………………………………… Rating : ……………………………………………………….

NOTE: Tests marked (C) are required for pre-commissioning inspection only. 1. Check the following items and note any deviations/defects under remarks : Circuit labelling Mechanical damage Door interlock Mechanical position indication Electrical closing, local / remote Electrical tripping, local / remote Alarm indication, local / remote Anti-condensation heater test insulation resistance heater at 500 V . …………………… …………………… …………………… …………………… …………………… …………………… …………………… …………………… ..…………………… Mohm …………………… ...…………………… Mohm

Wiring connections and marking test insulation resistance wiring at 500 V

2. Earthing : Check the condition of earthing bar and connections test the earthing bar continuity 3. Insulation resistance test – Switching devices ( C ) at 500 V Phase R……………………………. S……………………….………… T…………………… mohm Sheet No. : ……………… …………………… mohm

4. Protection relay test ( C ) ( Form No. 12)

5. Check and record the fuse : Class ……………………….. Remarks Rating ……………………. Condition ………………… Inspector : ……………………………… Date : ……………………………………

Remedial action completed:

Supervisor : ……………………....……. Date : ……..…………………….……….

Approval : CONSULTANT : ..……………………………. ADWEA : …….…………………….

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Form No. 12
LV OVERCURRENT AND EARTH-FAULT PROTECTION RELAY TEST

Location : ………………………………………………………………………………………..…………………………………….. Switchboard No. : ………………………………………………… Relay: Motor protection relay Manufacturer : …………………….. ..………..…………………… A Trip setting range : ………………………………………………..A Primary injection test At selected trip setting …………………..……………………….A Motor FLC : …………………….………………. A Type :……………………… Contactor rating : Panel No. : ………………………………………..

All three phases connected in series

Test current in % setting Current, A Relay condition Relay time , seconds Curve time, seconds ( supplied by manufacturer ) Earth – fault relay

300 …………….. Cold ……………... ……………

300 ………………… Warm ……………….. ………………..

120 ……………… warm ……………… ……………..

105 …………………. warm No trip after ………… min.

Setting …………………………………..A Measured pick – up current ………………………………A

Relay setting after test: Thermal relay Earth – fault relay Setting sealed …..………………… .. A ………………………… A …………………………

Remarks

Inspector : ……………………………… Date : ……………………………………

Approval : CONSULTANT : ..……………………………. ADWEA : …….……………….…

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Form No. 13
Page 1 INSPECTION OF POWER TRASFORMER

Location : ………………………………………………………………………………………..………….……………………………………. Transformer No. : …………………………………………… Enclosure : ………………………..………………………….. Rating : ……………………………………………….…. KVA Vector group : ………………………………………………... 1. Inspection of the switchgear transformer feeder unit Completed : …………………………………………………… Protection relay setting…………………………………….. 2. Insulation resistance tests : Cable Incl./excl. HV winding to earth LV winding to earth HV winding to LV winding 3. Continuity test - tap changer : after moving tap changer, Switch set at tap. No. ………………………………………………………………………… Continuity test – HV winding : R-S ……………..… 4. Earthing : Check the condition – neutral earthing Measure : - neutral earthing continuity - equipment earthing continuity 5. For breather type transformers : Check the position of the conservator valve Check the silica gel condition / colour Result of the oil test main tank conservator - test gas/ oil relay ( buchholz) alarm trip - Check thermometer ……………………………. reset max. indicator ………………… ………………… ………………… ………………… ………………… ………………… ………………………………………………… ………………………………………………… mohm ………………………………………………… mohm S-T ……………..… R-T ……………..… mohm ………………. ………………. ………………. Test Voltage ………………. ………………. ………………. ………………. ………………. ………………. Mohm Meter Used ………………. ………………. ………………. Sheet No. : ……………………………………….. Manufacturer : …………………………………….. Serial No. : ………………………………..……… Voltage: ………..……………./………………… V Current : …………..…………/…………..…….. A

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Form No. 13
Page 2

6. Check single core cable bonding (for pre - commissioning inspection only) 7. Inspection of the electrical system of cooling fans/ pumps: ………………………………………………………………… ………………………………………………………………..

8. Basic inspection completed

Sheet No.: …………………………………………

Remarks

Inspector : ……………………………… Date : ……………………………………

Remedial action completed:

Supervisor : ……………………....……. Date : ……..…………………….……….

Approval : CONSULTANT : ..……………………………. ADWEA : …….……………………

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Form No. 14
Page 1 INSPECTION OF ELECTRIC MOTOR – CASE-INDUCTION TYPE (including control unit)

Location : ………………………………………………………………………………………..………….…………………………………….. Transformer No. : ..…………………………………………… Manufacturer : ………………………..……………….……… System voltage: ……………………………………….……. V Driven equipment : ……………………………… Serial No. : ………………………………………. Rating: ……………………….……………… kW

NOTE: Tests marked (A) may be waived for motors below 30 kW rating. Tests marked (A) may be waived for motors below 100 kW rating driving centrifugal pumps.

1. Motor record sheet – Equivalent Record Cord completed. See DEP 70.10.01.10-Gen. ( for precommissioning inspection only) ………………………………………………………………………………………………….

2. Inspection of the switchgear motor supply unit completed : Sheet No.: ………………………………………… 3. Insulation resistance tests : before connecting cable : insulation resistance of cable ( phase to earth + phase) R-E …………………… S-E …………………… T-E …………………… Mohm Test voltage ………………………..……….V DC

insulation resistance of motor ( phase to earth ) after 1 min. ………………………………………. Mohm after 10 min. ………………..………………….. Mohm (A) Polarizing index. ………………………………… Mohm (A)

After connecting cable : check cable connection ………………….…………………………….………………………… insulation resistance motor + cable (phases to earth) …………………………………….. Mohm

4. Earthing: Check the condition of earthing connection at : Motor …………………………………………………… Control unit…………………………………………

5. Special items : check anti – condensation heater ……………………………………………………… test insulation resistance of heater at 500 V ………………………………………. Mohm test insulation resistance of temperature detector at 500 V …………………….. Mohm inspect electrical system aux. Motors …………………………………………………

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Form No. 14
Page 2

6. Basic inspection completed 7. Test / record the following items in uncoupled condition: record rotation from NDE: CW / CCW

Sheet No.: …………………………………………

measure vibration – refer sheet No. …………………………..……..…….. Max. reading …………………………..…… DE/NDE ( A)

(A)

-

record : starting time ( if over 1 sec. ) starting current no load current bearing temperature: bearing temperature (A) (B over 30 min.) : ………………………….…… sec. (A) ………………………….…… A ………………………………. A (A) (B)

Time

Min. °C °C °C

0

30

60

90

120

150

180

210

Temp. DE Temp. NDE Ambient temp.

……… ……… ………

……… ………... ………...

……… ………... ………...

………... ………... ………...

……… ……… ………...

……… ……… ………

………... ………... ………...

……… ……… ………

8. Record in coupled condition: starting time (if over 1 sec.) …………………………………………………sec. (A) Inspector : ……………………………… Date : ……………………………………

9. Remarks

Remedial action completed:

Supervisor : ……………………....……. Date : ……..…………………….……….

Approval : CONSULTANT : ..……………………………. ADWEA : …….………………………

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Form No. 15
Page 1 INSPECTION OF STATIC SYPPLY UNIT

Location : ………………………………………………………………………………………..…………………………………….. Unit No. : ………………………………………………….…….. Rectifier / inverter : ………………………..……………….…… Battery type : ……………………………………….……………. Manufacturer : …………………………………….. Serial No. : ……………………………………….. No. cells/ volts : ……………….…………………..

NOTE: Tests marked (C) and ( M) are required for pre-commissioning and maintenance inspection only. 1. AC /DC distribution board. Check: good condition – no mechanical damage Correct labelling – correct earthing Test: insulation resistance ( not for on- stream inspection) at 500-V DC Bar 1 – bar 2 ………………… Mohm Bar 1 - earth Bar 2 - earth ………………………………….. Mohm ………………………………….. Mohm ………………….. …………………..

Test earth- fault indication and detection …………………………… Record: fuse size……………………………………………………….. 2. Rectifier / Inverter Check the following items Correct earthing and cable connections Operating temperature in cabinet – no hot spots No accumulation of dust (heat sinks) No abnormal noise No leaking electrolytic capacitors (all parallel capacitors same temperature) Correct operation of : Forced cooling fan (if fitted) Interlock system Indicating lights, relays and remote alarms Change-over time ( inverter) Check / adjust if required: Inverter output voltage / frequency Rectifier charging rate …………………… …………………… …………………… …………………… …………………… …………………… …………………… …………………… …………………… …………………… …………………… Actual load……………………………

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Form No. 15

Page 2

3. Batteries Check that all connections are tight and anti-corrosive coating (Vaseline) is provided Check the liquid level of each cell Check the cells for leakage Test the insulation resistance to earth for lead acid batteries: test and record the specific gravity of the electrolyte in each cell for alkaline batteries: test the open voltage of each cell with digital voltmeter …………………… …………………… …………………… …………………… …………………… ……………………

Discharge test (C) (M) Discharge: Start ………………………………... h Finish ………………………………. h Total …………………………………h Capacity: …………………………….Ah Discharge current ………………….A

Time Terminal voltage Discharge, A Room temp., ° C Specific gravity / mV per cell:

Cell No. 1 2 3 4 5 6 7

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Form No. 15
Page 3

4. Basic inspection completed

Sheet No.: ……………………………………………………

5. Remarks

Inspector : ……………………………… Date : ……………………………………

Remedial action completed:

Supervisor : ……………………....……. Date : ……..…………………….……….

Approval : CONSULTANT : ..…………………………… ADWEA : …….………………………

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Form No. 16

INSPECTION OF LIGHTING INATALLATION (including distribution board)

Location: ………………………………………………………………………………………..………….………………………….. Lighting board No.: ……………………………………….…… System voltage: ………………………..……………….……… Manufacturer : …………………………………….. Purchase No.: ……………………………………..

NOTE: Tests marked (C) and /or (M) are required for pre-commissioning and /or maintenance inspections only. 1. Lighting distribution board. Establish and record the following:

1. area classification 2. type of Ex-protection 3. type of enclosure protection 4. circuit fuse size Test the insulation resistance at 500 V ( C) ( M) R-S……………………Mohm S-T……………………Mohm R-T……………………Mohm R-N………………………Mohm S-N………………………Mohm T-N………………………Mohm

R-E……………………Mohm S-E……………………Mohm T-E……………………Mohm

-

Check the following items and note any deviations / defects under remarks : 1. Correct labelling 2. Good general condition – no mechanical damage 3. No unauthorised modification of dust and dirt 4. No undue accumulation of dust and dirt 5. Adequate protection of board and cables against corrosion – the weather,vibration. etc. 6. Correct wiring – earthing in good condition 7. Correct operation earth leakage protection …..………………. …………………… …………………… …………………… …………………… …………………… ……………………

2. Lighting fittings and receptacles. Inspection list l lighting fittings and receptacles Form No. 17 - completed Sheet No. …………………………….. 3. Remarks: Inspector:……………………………….. Date:……………………………………..

Remedial action completed:

Supervisor:……………………………… Date:……………………………………..

Approval : CONSULTANT : …………………. ADWEA : ………………….

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Form No. 17
INSPECTION LIST LIGHTING FITTINGS/ RECEPTICLES

1 2 3 4 5 6 7 8 9 10 11 12 13

Circuit No. Insulation resistance to earth , Mohm (C)(M) Number of fittings/recepacles Make/type of fittings/recepticles Type of Ex-protection – ExType of enclosure – IPCircuit makins on fitting No unauthorisd modifications Enclosure and glasses satisfactory Seal and gaskets complete No undue accomulation of dust/dirt No damage to cables Adequate protection of fittings and cables against corrosion, vibration, weather, etc.

1

2

3

4

5

6

14 15

Test earth continuity to plant earth ( C) ( M) Remarks

NOTE: Tests marked ( C) and/ (M) are required for pre-commissioning and/or maintenance Inspection only.

Inspection: ……………..

Date: ………………...

Remedial action completed:

Supervisor: …………….. Date: …………………

Approval :

CONSULTANT : ………………….

ADWEA : ………………….

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Form No. 18
INSPECTION OF DISTRIBUTION FEEDER CABLE

Location: ………………………………………………………………………………………..………….………………………….. Cable No.: ……………………………………….………………… Cores : ………………………..…… Size : ………………….mm2 System voltage: ………………………………….. Cables rated voltage : ..…………………………..

NOTE: Tests marked (C) are required for pre-commissioning inspections only. 1. Establish and record : ( C) the lenght of cable ………………………………………………………………………………... 2. HV pressure test (C) ( 3 min. on 100% test voltage)

Test voltage % 40 60 80 100 kV …………….. …………….. …………….. ……………..

leakage R …………….. …………….. …………….. ……………..

Current S ……………. ……………. ……………. …………….

mA T …………… …………… …………… …………… Tested used : …………...

3. Insulation resistance test Phase R…………………Mohm S…………………Mohm T…………………Mohm ` Tested used :

…………………....

4. Remarks:

Inspector:……………………………….. Date:……………………………………..

Approval : CONSULTANT : …………………. ADWEA : ………………….

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