GT Trips List (Generic)

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Content

SIZE

B

DWG. NO.

401B3661
REV

SH.

1

REV.

REVISIONS DESCRIPTION DATE

IssuedBy

REVISE ON VISIO ONLY VISIO DRAWING : 401B3661SH1

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REV STATUS OF SHEETS

BOM ISSUED
UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES TOLERANCES ON 2 PL DECIMALS ± 3 PL DECIMALS ± ANGLES ± FRACTIONS ±

SIGNATURES
DRAWN RAGHU GUDA. CHECKED DURGA NALLAMOTTU ENGRG DURGA NALLAMOTTU ISSUED KERRIE LOKENBERG

DATE
08-11-12 08-11-12 08-11-12 08-11-12

g

GENERAL ELECTRIC COMPANY

GE Energy Products 9FA – TRIP LIST

C

COPYRIGHT 2008

GENERAL ELECTRIC COMPANY

THIRD ANGLE PROJECTION

PROPRIETARY INFORMATION-THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF GENERAL ELECTRIC COMPANY AND MAY NOT BE USED OR DISCLOSED TO OTHERS, EXCEPT WITH THE WRITTEN PERMISSION OF GENERAL ELECTRIC COMPANY.
0

APPLIED PRACTICES
SIM TO:

FIRST MADE FOR: -------SIZE CAGE CODE DWG NO

0476 401B3661
0
SHEET

B
SCALE

1 of 13

DT-1N

SIZE

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DWG. NO.

401B3661

SH.

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-

PROTECTIVE FUNCTION TURBINE TRIPs VIBRATION

SIGNAL NAME

TYPE

DESIGN JUSTIFICATION

DETECTION METHOD

LOGIC DESCRIPTION

ACTION SETPOINT (Nominal Setpoints)

GT Vibration Sensor Fault

L39VT

PROTECTIVE STATUS 2

Initiate a trip to avoid machine damage

39V1A,1B,2A,2B,4A,4B & 5A.

Trip when any detector measures vibration above trip level AND other detector in that pair is disabled or measures above alarm level for LK39TTD

See Control Spec: Trip Level LK39VTx = 1.0 inch/sec Alarm Level LK39VAx = 0.5 inch/sec LK39TTD= 0.5 sec

GT EXHAUST TEMPERATURE AND PRESSURE Trip when 96EP-1 pressure transmitter exceeds limit AND at 63ET-1,63ET-2 least one of the two 96EP-1 exhaust pressure trip switches 63ET-1 or 63ET-2 is picked up. Trip when exhaust temperature exceeds Exhaust Temperature TTKOT1 limit or when it TC's exceeds exhaust temp TT-XD-1 through 31 reference by TTKOT2 deg F. See Control Spec and Device Summary: 63ET-1:INCREASING: 24.0+-0.5 INH2O 63ET-2:INCREASING: 24.0+-0.5 INH2O KAFPEPHH=24 INH2O See Control Spec: TTKOT1 = 1240F TTKOT2 = 40F

Exhaust Duct Pressure High Trip

L63ETH

PROTECTIVE STATUS

Possible damage to exhaust system due to high pressure

Exhaust Overtemperature Trip

L86TXT

PROTECTIVE STATUS

Overtemperature of hot gas path components

Exhaust Overtemperature Trip

L86TXT

POST IGNITION TRIP

Overtemperature of hot gas path components

Exhaust Temperature TC's TT-XD-1 through 31

Trips when exhaust temperature exceeds TTKOT1,6,5 (TTRXB+TTKOT2)

See Control Spec: Over.temp trip isothermal settingTTKOT1 = 1240F Over.temp trip incremental setting.TTKOT2 = 40F diff Low range exhaust temp limit TTKOT5= 1215 F High range ex

Exhaust Thermocouples Open Trip

L86TFB

PROTECTIVE STATUS

Potential loss of temperature control and protection

Exhaust Temperature TC's TT-XD-1 through 31

Trip when exhaust temperature signal drops below TTKXM4 deg F while in operation.
SIZE CAGE CODE

See Control Spec: TTKXM4 = 250F Failed TC alarm constant
DWG NO

g

GENERAL ELECTRIC COMPANY
08-11-12 08-11-12

B
401B3661
SCALE CONT ON SHEET

0476
DISTR TO

DRAWN ISSUED

2 of 13

SIZE

B

DWG. NO.

401B3661

SH.

3

REV.

-

PROTECTIVE FUNCTION Compressor Discharge Pressure Low EXHAUST FRAME AND #2 BEARING High Load Tunnel Temperature Trip LUBE OIL AND HYDRAULIC OIL PROTECTION LOW LUBE OIL PRESSURE TRIP

SIGNAL NAME

TYPE

DESIGN JUSTIFICATION Potential loss of temperature control and protection

DETECTION METHOD

LOGIC DESCRIPTION Trip when compressor discharge pressure drops below CAKCPD psig when Gen breaker is closed.

ACTION SETPOINT (Nominal Setpoints) See Control Spec: CAKCPD = 35 psig

L3TFLT

PROTECTIVE STATUS

96CD-1, 1B, 1C

L30LTT

PROTECTIVE STATUS

Protect vibration monitor components

TT-IB-1,TT-IB-2,TT-IB3

Trip when Load Tunnel Inner Barrel Temp exceeds LTKTRIP deg F.

See Control Spec: LTKTRIP=500.0 degF

L63QTX

PROTECTIVE STATUS

Loss of bearing lubrication

96QT-1, 2, 3

2oo3 sensors reading low lube oil header pressure

15 psig QHTPK = customer specified DECREASING: 20.0+-2.0 PSIG OR 1.4061+-0.1406 KG/Cm2G (INCREASING: 22.0+-2.0 PSIG OR 1.5468+-0.1406 KG/Cm2G) NORM=(1) NO-CEC;

Trip Oil Pressure Low

L63HGL

PROTECTIVE STATUS

Loss of trip oil pressure to maintain stop/control valve position

63HG-1,2,3

2oo3 sensors reading low trip oil header pressure

COMBUSTION MONITOR AND GT FLAME DETECTION Trip occur (1) Spread See Control Spec: #1 > Allowable spread K30SPT= 2sec Allowable Spread limit Exhaust Temperature or (TTXSPL) = Calculated TC's Spread #1 (varies between TTKSPL7 TT-XD-1 through 31 >TTXSPL_Z1 and TTKSPL6 (30-125 AND Spread#2 is 0.8 degF) Compressor times greater rhan Steady state allowable Discharge TC's allowable spread when spread = function CT-DA-1, 2, 3 2nd and 3rd coldest (exhaust temperature, TC's are adjacent after compressor discharge K30SPT seconds temperature)

High Exhaust Temp Spread Trip

L30SPT

PROTECTIVE STATUS

Possible partial combustor flameout

g

SIZE

CAGE CODE

DWG NO

GENERAL ELECTRIC COMPANY
08-11-12 08-11-12

B
401B3661
SCALE SHEET

0476
DISTR TO

DRAWN ISSUED

3 of 13

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DWG. NO.

401B3661

SH.

4

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PROTECTIVE FUNCTION Loss of Flame Trip STARTING MEANS

SIGNAL NAME L28FDT

TYPE PROTECTIVE STATUS

DESIGN JUSTIFICATION Unburned fuel in hot gas path

DETECTION METHOD 28FD-1, 2, 3, 4

LOGIC DESCRIPTION Trip when two of the four combustor flame detectors indicate loss of flame. Trip when 1) Turbine Speed falls below highest attained speed by more than the allowable limit (LK60BOG1) for LK60BOG2 seconds, OR (2) Static starter fails to start after getting start up permissiv e After run and Torque command is giv en to startic

ACTION SETPOINT (Nominal Se tpoints) See Control Spec

Starting Dev ice Trip

L3SMT

PROTECTIVE STATUS

Starter Dev ice Troubles

TNH, 52CR-1

See Control Spec: LK60BOG1 = 5 % LK60BOG2 = 1 sec LK14SSBOG = 1 % LK60SSBOGTRIP = 45 sec, KSS_CON_FAIL = 10 sec K60SSBOGTRIP=45 SECONDS

GT COMPRESSOR PROTECTION Trip when difference between IGV position feedback (CSGV) and IGV refrence angle (CSRGV) is greater than LK86GVT1 DGA for more than LK86GVT2 sec below L14HS (95% speed), or when IGV position feedback (CSGV) is less than LK4IGVTX DGA abov L14HS e (95% sp Trip when any bleed v alv is not full open e after a time delay of K20CBY sec while the gen circuit breaker is open or the turbine drops below L14HS (94% speed) Trip when compressor pressure ratio, offset by CPKERRO, exceeds the compressor operating limit line by CPKERRMX for CPKERRTD sec.
SIZE CAGE CODE

IGV CONTROL TROUBLE TRIP

L4IGVT

PROTECTIVE STATUS

Impending loss compressor operating margin

96TV-1, -2 90TV-1

See Control Spec: LK86GVT1 = 7.5 DGA LK86GVT2 = 5 sec LK4IGVTX = 38 DGA

Compressor bleed v alv position fault e

L86CBT

PROTECTIVE STATUS

Impending loss compressor operating margin

33CB-1, 2, 3, 4

See Control Spec: K20CBY = 11 sec

Compressor Operating Limit Protection Trip

LCPRERR

PROTECTIVE STATUS

Compressor operation exceeds design limits

96CD-1, 1B, 1C

See Control Spec: CPKERRTD=3 sec CPKERRMX = -0.45 CPKERRO = 0.25

g

DWG NO

GENERAL ELECTRIC COMPANY
08-11-12 08-11-12

B
401B3661
SCALE SHEET

0476
DISTR TO

DRAWN ISSUED

4 of 13

SIZE

B

DWG. NO.

401B3661

SH.

5

REV.

-

PROTECTIVE FUNCTION FUEL CONTROL Gas Aux Stop Position Fault PreIgnition Trip

SIGNAL NAME

TYPE

DESIGN JUSTIFICATION

DETECTION METHOD

LOGIC DESCRIPTION Trip if the aux stop valve is commanded open and does not open or open fully before flame is detected. Trip when SRV position feedback, fsgr, exceeds startup fuel stroke reference high setpoint, LK60FSGH, and the warmup is not complete and also leak test master should be enabled. If you are on Liquid fuel and if flow divider speed FQL1 is higher than constant LK60FFLH FOR K2SFTL time In liquid fuel , turbine trip is intiated whenever fuel flow is high after completion of warmup,accelerating stage and no liquid fuel recirculation Trips when the firing timer, K2F, expires and when flame is not detected from 2 of 4 flame detectors after giving startcommand K6TT2 times and on total gas.

ACTION SETPOINT (Nominal Setpoints)

L4VS4_PI

PRE IGNITION

Prevent failed start caused by loss of gas flow

33VS4-1, 2

NA

Startup Fuel Flow High

L2SFT

PROTECTIVE STATUS TRIP 2

Prevent excessive fuel caused by valve control failure at ignition

Gas: 96SR-1,2 Liquid: 77FD-1,2,3

See Control Spec: LK60FSGH = 20%,LK60FFLH=14%

Failure to Ignite on Gas

L94FIG L4FIGFLT

PRE IGNITION TRIP L4PRET

Prevent excessive fuel caused by ignition failure

28FD-1, 2, 3, 4

See Control Spec: K2F = 30 sec K6TT2= times

Successive Failure to Ignite on Gas

L86FIGFLT

PRE IGNITION

Prevent excessive fuel caused by ignition failure

28FD-1, 2, 3, 4

Successive Failures to K62TT2 = 2 unsuccessfull light off on gas fuel. start attempts
SIZE CAGE CODE DWG NO

g

GENERAL ELECTRIC COMPANY
08-11-12 08-11-12

B
401B3661
SCALE SHEET

0476
DISTR TO

DRAWN ISSUED

5 of 13

SIZE

B

DWG. NO.

401B3661

SH.

6

REV.

-

PROTECTIVE FUNCTION

SIGNAL NAME

TYPE

DESIGN JUSTIFICATION

DETECTION METHOD

LOGIC DESCRIPTION Trip when a gas speed ratio valve fault occurs: the error between position command and psoition feedback exceeds K3GRVTX %. Trips (1) When GCV feedback is less than K3GCVFB after time delay of K3GFTD (2) When GCV is failed to open in comparison (greater)with LK3GCVxO when valve is not enabled after time delay of K3GVFTD (3) or if the servo current is lesser than K3GCVSC after time delay of K3GVFTD Trip when difference between GCV position and reference is greater than LK3GCVx for for 10 seconds. Trip when P2 pressure exceeds KFPG2IH for K86FPG2IH seconds before firing permissive is reached. Trip when P2 Pressure exceeds FPG2WUH (post ignition high pressure trip set point) for K86FPG2HT seconds between firing permissive and warmup complete.
SIZE CAGE CODE

ACTION SETPOINT (Nominal Setpoints)

Gas Speed/Ratio Valve Error

L3GRVT

PROTECTIVE STATUS

Inability to control fuel

96SR-1, 2

See Control Spec: K3GRVTX = 5%

Gas Control Valve Servos Check

L3ACS

PRE IGNITION TRIP L4PRET

Inability to control fuel

96GC-x, 77FD

See Control Spec: LK3GCVxFB = -5% LK3GCVxO = 5% LK3GCVxSC = 37.5% K3GVFTD=3 sec (where x = GCV number: 1, 2, 3, Q)

Gas Control Valve Not Following Reference Trip

L86GCVxT

PROTECTIVE STATUS TRIP 3

Inability to control fuel

96GC-n

TO See Control Spec: k836gv = % LK3GCV = 10 sec

Gas Fuel Intervalve P2 Pressure High Before Ignition

L86FPG2IH

PRE IGNITION TRIP L4PRET

Potential high temperature ignition.

96FG-2A, 2B, 2C

See Control Spec: KFPG2IH = 6 psig K86FPG2IH = 5 sec

Gas Fuel Intervalve P2 Pressure High During Ignition and Warm Up

L86FPG2H T

PROTECTIVE STATUS TRIP 2

Potentially High Temperature Ignition

96FG-1, 2A, 2B

See Control Spec: K86FPG2HT = 5 sec

g

DWG NO

GENERAL ELECTRIC COMPANY
08-11-12 08-11-12

B
401B3661
SCALE SHEET

0476
DISTR TO

DRAWN ISSUED

6 of 13

SIZE

B

DWG. NO.

401B3661

SH.

7

REV.

-

PROTECTIVE FUNCTION

SIGNAL NAME

TYPE

DESIGN JUSTIFICATION

DETECTION METHOD

LOGIC DESCRIPTION Trip when P2 pressure falls below FPG2WUL (post ignition P2 low pressure trip setpoint) for K86FPG2LT seconds between firing permissive and warmup completeon fuel gas operation Trip when the leakage across the SRV is excessive and the P2 cavity pressure rises above K86GLTA psig in K86GLT1 seconds, or if the P2 pressure drops below K86GLTB psig in K86GLT3 sec during a bottle test both during startup and shutdown. Trip when any of the following conditions match: (1) when Aux gas purge trip OR (2) When Pilot premix mode or premix mode and K20PG3ONY sec. to G3 purge command off and purge G3 command close category 4 fault OR (3) Purge G1 Command Close Category Fault and TD G1 Purge command off in Prmix mode (4) TD G2 purge cmd off and purge command category fault
SIZE CAGE CODE

ACTION SETPOINT (Nominal Setpoints)

Gas Fuel Intervalve P2 Pressure Low PROTECTIVE L86FPG2LT During Ignition and STATUS TRIP 2 Warm Up

Potentially High Temperature Ignition

96FG-2A, 2B, 2C

See Control Spec: K86FPG2LT = 15 sec

Excessive P2 Cavity Leak

L94GLTSU L94GLTSD

PRE IGNITION

Prevent excessive fuel during ignition causing fuel to ignite

96FG-2A, 2B, 2C

See Control Spec: K86GLTA = 100 psig K86GLT1 = 30 sec K86GLTB = 150 psig K86GLT3 = 30 sec

Gas Purge for DLN 2+

L4GPFT

TRIP

Non Functioning Gas Fuel Purge System

33PG-xx,63PGxx,20PG-x

K20PG3ONY = 8 Sec.

g

DWG NO

GENERAL ELECTRIC COMPANY
08-11-12 08-11-12

B
401B3661
SCALE SHEET

0476
DISTR TO

DRAWN ISSUED

7 of 13

SIZE

B

DWG. NO.

401B3661

SH.

8

REV.

-

PROTECTIVE FUNCTION

SIGNAL NAME

TYPE

DESIGN JUSTIFICATION

DETECTION METHOD

LOGIC DESCRIPTION Trip when either of following condition match (1) Purge G3 command open no faults and K20PG30NZ1 sec. TD G3 Purge commandm On Flame not Detected Minimum speed signal come (2)Purge G2 command open no faults and K20PG20NZ1 sec. TD G2 Purge commandm On Flame not Detected Minimum speed signal come (3) Purge G1 command open no faults and K20PG10NZ1 sec. TD G1 Purge commandm On Flame not Detected Minimum speed signal come

ACTION SETPOINT (Nominal Setpoints)

Gas Purge Fault Preignition

L4GPF_PI

PRE IGNITION TRIP

Non Functioning Gas Fuel Purge System

33PG-xx,63PGxx,20PG-x

K20PG30NZ1 = 50 sec.K20PG20NZ1 = 50 sec.K20PG10NZ1 = 50 sec.

SPEED PROTECTION Turbine Primary Electrical Overspeed Trip L12H PROTECTIVE STATUS Overstress of rotating components 77NH-1, 2, 3 Trip when median selected speed is above Primary OS trip level
SIZE CAGE CODE

See Control Spec: TNKHOSTrip Level = 110%
DWG NO

g

GENERAL ELECTRIC COMPANY
08-11-12 08-11-12

B
401B3661
SCALE SHEET

0476
DISTR TO

DRAWN ISSUED

8 of 13

SIZE

B

DWG. NO.

401B3661

SH.

9

REV.

-

PROTECTIVE FUNCTION Turbine Emergency Electrical Overspeed Trip

SIGNAL NAME L12H_P

TYPE PROTECTIVE STATUS

DESIGN JUSTIFICATION Overstress of rotating components

DETECTION METHOD 77HT-1, 2, 3

LOGIC DESCRIPTION

ACTION SETPOINT (Nominal Setpoints)

Loss of Primary Control Speed L12HF Signal Loss of Emergency Control Speed L12H_FLT Signal

PROTECTIVE Loss of speed control and STATUS TRIP 3 Primary OS protection PROTECTIVE Loss of speed control and STATUS TRIP 2 Emergency OS protection

77NH-1, 2, 3

77HT-1, 2, 3

Speed Signal Deviation Fault

L12HFD_C L12HFD_P

PROTECTIVE STATUS

Potential loss of speed control and protection

77NH-1, 2, 3 77HT-1, 2, 3

Loss of Emergency L12H_ACC Speed Signals TURBINE CONTROL PANEL Control System Fault Trip L3SFLT

PROTECTIVE STATUS

Potential loss of overspeed protection

77HT-1, 2, 3

Trip when median See Control Spec: selected speed is Emergency Trip Level = above Emergency OS 110% trip level Trip when primary See Control Spec: speed signal is low Speed signal < 5% while in operation Trip when emergency See Control Spec and speed signal is low GEH 6421 Chapter 7: while in operation Speed signal < 2.16RPM Trip when difference between Emergency See Control Spec: speed signal and Trip Level = 5% of rated Primary speed signal is speed greater than the trip level. Trip when 2oo3 Emergency speed NA signals indicate sudden deceleration.

PROTECTIVE STATUS TRIP

Controller Fault <P> Core Trip

Loss of TMR Voting Various

Protective Module L5CMPST_ <P> Trip TRP

Trip when 2 of 3 controllers are not voting. Trip when 2 of 3 <P:> controllers are Trip
SIZE CAGE CODE DWG NO

NA NA
0476
DISTR TO

g

GENERAL ELECTRIC COMPANY
08-11-12 08-11-12

B
401B3661
SCALE SHEET

DRAWN ISSUED

9 of 13

SIZE

B

DWG. NO.

401B3661

SH.

10

REV.

-

PROTECTIVE FUNCTION CUSTOMER Customer Trip

SIGNAL NAME

TYPE

DESIGN JUSTIFICATION

DETECTION METHOD

LOGIC DESCRIPTION

ACTION SETPOINT (Nominal Setpoints) Trip when Customer Trip hardwired digital input drops out. NA

L4CT

PROTECTIVE STATUS PROTECTIVE STATUS

Customer Crosstrip

Customer Crosstrip Contact inputs from Customer and Local Panel

Contact inputs from Customer controller Trip when Remote or Local E-Stop pushbutton is depressed.

Emergency Pushbutton Trip STEP TO MIN LOAD

L5E, R5E

Emergency Trip

Compressor Bleed L83CB_L_S Valves TEP

PROTECTIVE STATUS

Initiate a Step to Spinning Reserve to avoid machine damage

33CB-1, 2, 3, 4

2oo3 Compressor Bleed Valve Open Limit Switches indicate open when commanded closed AND IGVs have 2oo3 open limit switches op ened past the for each of 4 Bleed Valves minimum operating positionL33CSGV_CB. IGV is opened during operation

STEP TO FSNL Remote Breaker Open Detect L83RBO PROTECTIVE STATUS Initiate a Step to Full Speed No Load to avoid machine damage due to overspeed Initiate a Step to Full Speed No Load to avoid machine damage due to overspeed TNH, TNHA 77NH Overspeed and Acceleration Detected Load Rejection due to Generator Breaker opening
SIZE CAGE CODE DWG NO

101.5 % speed, 3 %/sec acceleration

External52G Trip

L52GX

PROTECTIVE STATUS

52GX

NA

g

GENERAL ELECTRIC COMPANY
08-11-12 08-11-12

B
401B3661
SCALE SHEET

0476
DISTR TO

DRAWN ISSUED

10 of 13

SIZE

B

DWG. NO.

401B3661

SH.

11

REV.

-

PROTECTIVE FUNCTION DCS Breaker Open Command

SIGNAL NAME lca4_fsnl

TYPE PROTECTIVE STATUS

DESIGN JUSTIFICATION STEP TO FSNL

DETECTION METHOD HRSG temperatures

LOGIC DESCRIPTION Load Rejection due to DCS detecting highhigh HRSG temperatures Open Breaker when Maximum of dwatt1 and dwatt2 is less then LK32DWRP When DWATT is lesser than DWTLLIM and Gen Watt transducer is sensing fault after time delay of V32DWTDC Gen Bkr opens on reverse power Open Breaker when operator Issue Manual breaker open Trips before ignition if DC emergencey lube oil pump is determined to be in under voltage condition Trips before ignition if DC emergencey seal oil pump is determined to be in under voltage condition Trip Signal is generated by logic L45LEL_PRET. This protection generates TRIP command in either og the following operating condition (1) If Turbine compartment Haz Gas Level Hi (2) If Gas Compt Has gas Level Hi (3) If Turbine compt Local Haz Gas Level Hi (4) If either of this Haz Gas monotor Rack #1, Rack # 2, Rack#3 (5) If Haz Gas syatem analog signal trbl
SIZE CAGE CODE

ACTION SETPOINT (Nominal Se tpoints) Customer

Reverse Power Detected

L32DW

STEP TO FSNL

Open Breaker to Avoid Generator Motoring

Maximum of MW sensors

Generator Power < LK32DWRP (-4.8MW)

Manual Breaker open Emegency Lube Oil Pump Undervoltage Relay SEAL OIL Emegency Seal Oil Pump Undervoltage Relay

L52GT_TRI P

STEP TO FSNL

Operator initiated manual breaker trip

Operator Action

Operator Initiated

L27QEL

PRE IGNITION TRIP L4PRET

Loss of Bearing Lubrication

27QE-1

NA

L27ESL

PRE IGNITION TRIP L4PRET

Loss of Seal Lubrication

27ES-1

NA

Haz gas Level High High start inhibit

l45LEL_PR ET

PROTECTIVE STATUS

To prevent dangerous atm

45HA,HT,HG

NA

g

DWG NO

GENERAL ELECTRIC COMPANY
08-11-12 08-11-12

B
401B3661
SCALE SHEET

0476
DISTR TO

DRAWN ISSUED

11 of 13

SIZE

B

DWG. NO.

401B3661

SH.

12

REV.

-

PROTECTIVE FUNCTION Fire ignition trip

SIGNAL NAME L45FTX

TYPE PROTECTIVE STATUS TRIP 1

DESIGN JUSTIFICATION Emergency due to fire

DETECTION METHOD 94F1-B

LOGIC DESCRIPTION Trip signal generates If either fire found in Turbine/Acc compt or other any of 4 zones Gen trip lock out [l86g1a],Breaker failure lock out [l86bft], Gen& GSU Transformer lock out trip[l86v] ,GSU Transformer lock out trip [l86t] Unit trip Via 86G1B[l86g_1b], Trip command will triggered if Emergency push button pressed Turbine trips after time delay of BY K4BTFLT When low ventillation pressure still both oh of the ventillation fans running Trips when level gets high when compared with predetermined level Trips when level gets high when compared with predetermined level

ACTION SET POINT (Nomina l Set points)

Generator protective trip

L86GT

PROTECTIVE STATUS TRIP 1

To avoid generator damage

Electrical inputs L86 signals

Emergecny stop

L5ESTOP1 _FBZ

PROTECTIVE STATUS TRIP 1

To trip the machine giving manual command

[5E-1/PB] [R5E/PB]

Turbine compartment loss of ventillation trip

L4BTFLT

PROTECTIVE STATUS TRIP 2

Over heating of turbine compartment

63AT-1.2.3,4

See control specification K4BTFLT = 60sEC

Scrubber dp/Level very high trip

L4PSTX 4_A

PROTECTIVE STATUS TRIP 4

To prevent uncleaned/moistured fuel entering into the machine To prevent uncleaned/moistured fuel entering into the machine

71GS-1 ,2A,2B

Coalescing filter level high trip

L4PSTX 4_B

PROTECTIVE STATUS TRIP 4

71GCF1A,1B,2A,2B,3A,3B

Load compartment loss of ventillation trip

L63AG_TR P

PROTECTIVE STATUS TRIP 4

Prevent overheating in Load gear compartment

63AG-1,2

Trip signal will generate 1)If load compt vent pressure comes low sensed by both Control spec Pressure pr.switches after a switch setting time delay of 30 sec GEAR/LOAD COMPT AIR K63AG_TRP2 still two PRESSURE SWITCH fans are running DECREASING: 0.4 2)Load compt vent fan INH2O OR 10.1600 control signal is mmH2O enabled , still pressure NORM=NO-CEC; from sensed by 63AG 1,2 is GR1072 low after time delay of 7 min K63AG_TRP2 trip signal will be generated
SIZE CAGE CODE DWG NO

g

GENERAL ELECTRIC COMPANY
08-11-12 08-11-12

B
401B3661
SCALE SHEET

0476
DISTR TO

DRAWN ISSUED

12 of 13

SIZE

B

DWG. NO.

401B3661

SH.

13

REV.

-

PROTECTIVE FUNCTION

SIGNAL NAME

TYPE

DESIGN JUSTIFICATION

DETECTION METHOD

LOGIC DESCRIPTION Trips when (1)IF After the firing timer delay of L2F ,no flame is detected in total liquid fuel mode (2) Any protective trip command triggers when Startup firing fuel command is enabled or under operation (3) If total mass flow of liquid fule is gr Trips When fuel feedback exceeds limit while L20FLXX _X timer is denergized ,when there is no recirculation and total liquid fuel

ACTION SET POINT (Nominal Set points)

Failure to Ignite on Oil

L94FIL

Pre Ignition trip L4PRET

Prevent excessive fuel caused by ignition failure

28FD-1, 2, 3, 4, 77FD 77NH,77HT

L2F = 30 Seconds K3RSLF1=120Sec

Fail to tranfer to initiate liquid fuel

L3FFL_FLT

Pre Ignition trip L4PRET

Unable to tranfeer to liquid fuel

77FD

K33FFL_FLT=15 Sec

g

SIZE

CAGE CODE

DWG NO

GENERAL ELECTRIC COMPANY
08-11-12 08-11-12

B
401B3661
SCALE SHEET

0476
DISTR TO

DRAWN ISSUED

13 of 13

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