Terms and Abbreviation for GE Gas Turbines

1

TERMS AND ABBREVIATION GT 5-8 Sr-# Abbreviation

Description

1-

DW

Generator load in MW

2-

SFL

Frequency - Hz

3-

TNH - PR

Rated speed - RPM

4-

TNH SET

Seed setpoint

5-

CTIM

Ambient temperature (Maximum)

6-

CTIF 1

Ambient temperature

7-

CTIF 2

Ambient temperature

8-

CTDA 1

Compressor discharge temperature

9-

CTDA 2

Compressor discharge temperature

10-

TT 1 B 1

Turbine inlet barrel (Bearing No-3 Casing temperature)

11-

CPD

Compressor discharge pressure

12-

L 4 TG

Turning gear position

13-

FSR

Fuel struck reference

14-

FQ PR

Flow divider speed

15-

FSL

Position fuel stop valve (in percentage %) For liquid fuel

16-

FQ

Fuel consumption per second (Kg/Sec Liquid fuel)

17-

CSRGV

Stop speed ratio valve (Fuel gas)

18-

CSGV

Gas control valve

2

CHANGING OF REALYS DURING START-UP SEQUENCE FOR SPEEDTRONIC MARK-4 CONTROL SYSTEM SR-# 1-

Relay-No i- 14 HT ii-14 HR

2-

14 HM

3-

14 HA

4-

14 HC

5-

14 HS

Description iTurning gear 8% of rated speed. iiWhen machine remain on turning gear for 48 hours. After auto start-up command From turning gear up to 50% of rated speed. Actions during change of this relay. (a) Auxiliary Hydraulic Pump. (b) Auxiliary Lube Oil Pump. (c) Automizing air Booster (On liquid fuel). (d) HSD Fuel OIL Pump Start-up. (e) Main Flame On. From 50% to 60% of Rated speed. There is no action during change of this relay. From 60% to 95% of rated speed. (a) Starting Motor Cut off. (b) Generator Cooling water supply on. From 95% to Rated speed - synchronic speed (3000 RPM). Action during change of this relay. (a) Field breaker close. (Excitation breaker on). (b) Auxiliary Hydraulic oil pump stop. (c) AC-Lube oil pump stop. (d) Automizing air booster stop (Because main automizing air booster come in action through accessory gear) (e) Full speed no load. (f) Synchronizing generator.

CHANGING OF REALYS DURING SHUTDOWN SEQUENCE GT 5-8 SR-# 1234-

Relay No 14 HS 14 HC 14 HA 14 HM

Description At stop impulse. After desynchrinizing. At 92% of rated speed. At 50% of rated speed. At 40% of rated speed.

3

5-

14 HT

At 8% of rated speed (Turning gear on)

HOURS OF OVERHAULING AND INSPECTION 1. Combuster inspection after

7500 Hours.

2. Hot gas path inspection

22500 Hours.

3. Major overhauling

45000 hours.