Download GT Trips List (Generic) PDF

TitleGT Trips List (Generic)
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Page 1

SIZE

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CAGE CODE DWG NO

SIGNATURES DATE

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ISSUED

UNLESS OTHERWISE SPECIFIED

DIMENSIONS ARE IN INCHES

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GENERAL ELECTRIC COMPANY

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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.

C

APPLIED

PRACTICES

REVISE ON VISIO ONLY

401B3661 1 -

1 of 13

401B3661

--------FIRST MADE FOR:

SIM TO:

0476
9FA – TRIP LIST

08-11-12

08-11-12

08-11-12

COPYRIGHT 2008 GENERAL ELECTRIC COMPANY

DT-1N

REVISIONS

REV DESCRIPTION DATE IssuedBy

RAGHU GUDA.

DURGA NALLAMOTTU

DURGA NALLAMOTTU

08-11-12KERRIE LOKENBERG

BOM ISSUED

REV STATUS

OF SHEETS

REV

SH1

-

2

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VISIO DRAWING : 401B3661SH1

12

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401B3661

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401B3661 2 -

CONT ON

PROTECTIVE

FUNCTION

SIGNAL

NAME
TYPE

DESIGN

JUSTIFICATION

DETECTION

METHOD
LOGIC DESCRIPTION

ACTION SETPOINT

(Nominal Setpoints)

TURBINE TRIPs

VIBRATION

GT Vibration Sensor

Fault
L39VT

PROTECTIVE

STATUS 2

Initiate a trip to avoid

machine damage

39V-

1A,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

Exhaust Duct

Pressure High Trip
L63ETH

PROTECTIVE

STATUS

Possible damage to

exhaust system due to

high pressure

63ET-1,63ET-2

96EP-1

Trip when 96EP-1

pressure transmitter

exceeds limit AND at

least one of the two

exhaust pressure trip

switches 63ET-1 or

63ET-2 is picked up.

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

Exhaust

Overtemperature

Trip

L86TXT
PROTECTIVE

STATUS

Overtemperature of hot

gas path components

Exhaust Temperature

TC's

TT-XD-1 through 31

Trip when exhaust

temperature exceeds

TTKOT1 limit or when it

exceeds exhaust temp

reference by TTKOT2

deg F.

See Control Spec:

TTKOT1 = 1240F

TTKOT2 = 40F

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.

See Control Spec:

TTKXM4 = 250F Failed TC

alarm constant

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401B3661

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401B3661 6 -

PROTECTIVE

FUNCTION

SIGNAL

NAME
TYPE

DESIGN

JUSTIFICATION

DETECTION

METHOD
LOGIC DESCRIPTION

ACTION SETPOINT

(Nominal Setpoints)

Gas Speed/Ratio

Valve Error
L3GRVT

PROTECTIVE

STATUS
Inability to control fuel 96SR-1, 2

Trip when a gas speed

ratio valve fault occurs:

the error between

position command and

psoition feedback

exceeds K3GRVTX %.

See Control Spec:

K3GRVTX = 5%

Gas Control Valve

Servos Check
L3ACS

PRE IGNITION

TRIP L4PRET
Inability to control fuel 96GC-x, 77FD

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

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

Trip when difference

between GCV position

and reference is greater

than LK3GCVx for for

10 seconds.

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

Trip when P2 pressure

exceeds KFPG2IH for

K86FPG2IH seconds

before firing permissive

is reached.

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

Trip when P2 Pressure

exceeds FPG2WUH

(post ignition high

pressure trip set point)

for K86FPG2HT

seconds between firing

permissive and warmup

complete.

See Control Spec:

K86FPG2HT = 5 sec

Page 7

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401B3661 7 -

PROTECTIVE

FUNCTION

SIGNAL

NAME
TYPE

DESIGN

JUSTIFICATION

DETECTION

METHOD
LOGIC DESCRIPTION

ACTION SETPOINT

(Nominal Setpoints)

Gas Fuel Intervalve

P2 Pressure Low

During Ignition and

Warm Up

L86FPG2LT
PROTECTIVE

STATUS TRIP 2

Potentially High

Temperature Ignition
96FG-2A, 2B, 2C

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

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

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.

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,63PG-

xx,20PG-x

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

K20PG3ONY = 8 Sec.

Page 12

g GENERAL ELECTRIC COMPANY
SIZE

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CAGE CODE DWG NO

SHEET

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DRAWN

ISSUED

SIZE DWG. NO. SH. REV.
B

D
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401B3661

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401B3661 12 -

PROTECTIVE

FUNCTION

SIGNAL

NAME
TYPE

DESIGN

JUSTIFICATION

DETECTION

METHOD
LOGIC DESCRIPTION

ACTION SET POINT

(Nominal Set points)

Fire ignition trip L45FTX
PROTECTIVE

STATUS TRIP 1
Emergency due to fire 94F1-B

Trip signal generates

If either fire found in

Turbine/Acc compt or

other any of 4 zones

Generator protective

trip
L86GT

PROTECTIVE

STATUS TRIP 1

To avoid generator

damage

Electrical inputs L86

signals

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],

Emergecny stop
L5ESTOP1

_FBZ

PROTECTIVE

STATUS TRIP 1

To trip the machine giving

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

Trip command will

triggered if Emergency

push button pressed

Turbine

compartment loss

of ventillation trip

L4BTFLT
PROTECTIVE

STATUS TRIP 2

Over heating of turbine

compartment
63AT-1.2.3,4

Turbine trips after time

delay of BY K4BTFLT

When low ventillation

pressure still both oh of

the ventillation fans

running

See control specification

K4BTFLT = 60sEC

Scrubber dp/Level

very high trip
L4PSTX4_A

PROTECTIVE

STATUS TRIP 4

To prevent

uncleaned/moistured fuel

entering into the machine

71GS-1 ,2A,2B

Trips when level gets

high when compared

with predetermined

level

Coalescing filter

level high trip
L4PSTX4_B

PROTECTIVE

STATUS TRIP 4

To prevent

uncleaned/moistured fuel

entering into the machine
71GCF-

1A,1B,2A,2B,3A,3B

Trips when level gets

high when compared

with predetermined

level

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

pr.switches after a

time delay of 30 sec

K63AG_TRP2 still two

fans are running

2)Load compt vent fan

control signal is

enabled , still pressure

sensed by 63AG 1,2 is

low after time delay of

7 min K63AG_TRP2

trip signal will be

generated

Control spec Pressure

switch setting

GEAR/LOAD COMPT AIR

PRESSURE SWITCH

DECREASING: 0.4

INH2O OR 10.1600

mmH2O

NORM=NO-CEC; from

GR1072

Page 13

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SIZE

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CAGE CODE DWG NO

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B

DRAWN

ISSUED

SIZE DWG. NO. SH. REV.
B

D
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0476

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401B3661

13 of 13

401B3661 13 -

PROTECTIVE

FUNCTION

SIGNAL

NAME
TYPE

DESIGN

JUSTIFICATION

DETECTION

METHOD
LOGIC DESCRIPTION

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

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

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

Trips When fuel

feedback exceeds

limit while L20FLXX _X

timer is denergized

,when there is no

recirculation and total

liquid fuel

K33FFL_FLT=15 Sec

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