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Glossary of Gas Terms

   
 

Typical Schematic Piping Diagrams

Typical Schematic Piping Diagrams

CODE          Description
AA              Atomizing Air
CA              Control Air
CD               Control Devices - Turbine
CSA            Cooling & Sealing Air
CW              Cooling Water
FF                Liquid Fuel Forwarding
FP                Fire Protection
FSU             Fuel Selection Unit
GEN             Generator Devices
GF               Fuel Gas
HGD            Hazardous Gas Detection
HS               Hydraulic Supply
HV               Heating & Ventilating
HYD             Hydrogen Service
IE                 Inlet & Exhaust
IGV              Inlet Guide Vanes Modulated
IGV              Inlet Guide Vanes Two Position
LF                Liquid Fuel
LO               Lube Oil
SI                 Steam Injection, Low Nox – SH1
SI                 Stm Injection, Augmentation - SH2
SM               Starting Means
TCW            Turbine & Compressor Wash
TO              Trip Oil
WFU           Water Forwarding
WIS             Water Injection System
WWU          Water Wash

GE MkIV turbine controls
Modules:
<CLIM1> : Communication Line Isolation Module DS3820LIM
<OPM>    : Operator Interface Module DS3820PIMA
<RTD>     :Resistance Temperature Detector Input Module  DS3820RTDA
<SYNCH>: Synchronizer Isolation Module  DS3820MSA
<TSIM1>  : Time Synchronization Isolation Module  DS3820DIMC

Cards:
HAFA       :Auxiliary Function
HAIC        :Analog Input
HCMA/C  :Dual Communication
HCMB      :Universal Communication Processor
HCVA      :Digital to Analog Output
HIOD        :Digital Input / Output
HMHA      :Master Highway Controller (HLNE)
HMPJ        :Microprocessor
HMPK       :Microprocessor  (See HMPJ)
HFIB         :Operator Panel Interface
HPRA/B    :Pulse Rate Input
HRDB       :Relay Driver
HSAA       :Servo Amplifier
HSCG        :High Level Isolation
HUMA/B  :Universal Memory
HVDB       :Video Driver
HXPD       : CPU Expander
NAIA        :Multiplexed Current-Loop Input
NTCF        :Thermocouple Input
NVCA/B/D:Vibration and Pressure Amplifier
SIXJ          :Power Supply Select Board
SIXK         :Relay Module Sense
SIXL         :Relay Module Extender
SIXM        :Interface Board
<AC1>   : AC to DC Source
<AC2>   : AC to DC Source
<ACS>   : AC Source Selector
<C>                         : Common Processor
<CD>      : Digital I/O
<CPF>    : Control Power Filter Module
<D>        : Redundant Common Processor
<DD>      : Digital Input
<PD>      : Power Distribution
<P>                         : Protective
<PLU>    : Power Load Unbalance
<QD1>   : Digital I/O
<QD2>   : Digital I/O
<R>        : Controler / Processor
<S>        : Controler / Processor
<T>        : Controler / Processor
SDCC     : CPU
SLCC     : LAN daughter board for voter link
TCEB     : Common circuits for the EOS
TCPA     : <PLU> I/O
TCPD     : Power distribution
TCPS     : DC input Power Supply with Signal Conditioning
TCQA    : <RST> analog I/O
TCQB    : <RST> Extended Analog I/O #1
TCQC    : <RST> Overflow
TCQE    : <RST> LM6000 Analog I/O
TCRA    : Relay
TCTG      : GT TMR and Simplex trip
TCGS      : ST TMR and Simplex trip
TCTL       : ST TMR large stream - reheat trip
CTBA     : <C> Core Servo Amplifier
DTBA     : Digital contact ins #1
DTBB     : Digital contact ins #2
DTBC     : Relay / solenoid outs #1
DTBD     : Relay / solenoid outs #1
PTBA     : <P> Core
QTBA     : <RST> Core
TBCA     : <C> analog signals
TBCB      : <C> analog signals
TBPA     : <PLU> low-level signals
TBQA     : <C> or <RST> TC signals
TBQB     : <RST> analog signals
TBQC     : <RST> analog signals
TBQD     : <RST> extended analog signals
TBQE     : <RST> LM6000 analog signals
TBQF     : <RST> extended analog signals (Large Steam)
<B>                         : Term used to collectively describe <C> and <D> processors
<Q>                        : Term used to collectively describe <R>, <S> and <T> processors
<H>                        : Historian
<G>                        : Gateway – PC based interface for Ethernet connection
<I>                          : Doss based operator Interface
<HMI>   : Window NT based operator interface
<X>                         : <P> processor – Protective hardware
<Y>                         : <P> processor – Protective hardware
<Z>                         : <P> processor – Protective hardware
<P>                         : Term used to collectively describe <X>, <Y> and <Z> hardware
<PLU>    : Term used to collectively describe <U>, <V> and <W> hardware
DCCA     :CPU or control processor board contains the 80186 microprocessor which is the heart of the system. The CPU board also contains the 80196 microprocessor used for communication, 32010 math co-processor used for auto sync functions, EEPROM and dual ported RAM. The DCCA board has a green LED that indicates the status of the microprocessor. There is a small pushbutton switch mounted on the    board for re-booting the processor after down loading new software into the EEPROM.
LCCB      :This is the LAN (Local Area Network) daughter board for the voter link. The LCCB board mounts on the DCCA CPU board and contains the 80196 communication microprocessor, a key pad and display. The key pad and display are used for system diagnostics.
TCCA     :<C> analog I/O board. The operator interface or <I> processor is connected to this board through its coax cable. The TCCA board has one 80196 communications microprocessor.
TCCB      :This is the extended analog I/O board #1 for the <C> processor.
TCDA     :Digital I/O board. The TCDA board contains one 80196 communications microprocessor and the optical isolation for the contact inputs coming in from the field.
TCEA      :EOS board The TCEA board is responsible for processing the over speed and flame detection trip signals. The TCEA board also contains one 80196 communication microprocessor. There are a series of berg jumpers that program the board to the location in the <P> core where it resides. If you move the board within the core, you must move the berg jumpers. There is an LED on the board that when lit indicates the 80196 is functional.
TCEB      :Contains the common circuits for the EOS board.
TCPD     :Power distribution board. This board contains fuses, LEDs and power distribution connectors and cables that distribute the 125 vdc to all the cores. Each fuse has an indicating green LED that when lit indicates the fuse is good. There are additionally several red LEDs on the board that when lit indicate the fuse is bad.
TCPS      :DC input power supply board with signal conditioning.
TCQA     :<RST> Analog I/O board. This board processes the analog input and output signals. The TCQA board contains one 80196 communication microprocessor.
TCQB     :<RST> extended analog I/O board #1. This is used in conjunction with the TCQA board.
TCQC     :<RST> overflow board that is used in conjunction with the TCQA and TCQB boards.
TCRA     :Relay board. The TCRA board contains 30 plug-in relays. Each relay has a contact rating of 0.5 amps.
TCTG, L, S            (G) Gas turbine trip board.  (L) and (S) are steam turbine trip boards.

Terminal Board Mnemonics

CTBA     :Termination for <C> core. The termination signals are as follows:

Ma. Input and Ma. Output

Communication link for IONET

Communication link to <I> processor (ARCNET)

  Mounted on the TBQA board is a 9-pin RS232 connector for TIMN (Terminal Interface Monitor New) diagnostics

DTBA     :Termination for digital contact inputs #1 - #46. It is recommended to bring field contacts back in pairs to the correct input terminals. There are series of berg jumpers on the DTBA that, when removed, will isolate sections of contact inputs to ease in troubleshooting ground faults. The input voltage range is 24vdc to 125vdc. When using 24vdc inputs an external power supply must be used. To do this, remove the power connector from the <PD> and connect 24vdc to it.
DTBB     :Termination for digital contact inputs #47 - #96. It is recommended to bring field contacts back in pairs to the correct input terminals. There are series of berg jumpers on the DTBB that, when removed, will isolate sections of contact inputs to ease in troubleshooting ground faults. The input voltage range is 24vdc to 125vdc. When using 24vdc inputs an external power supply must be used. To do this, remove the power connector from the <PDM> and connect 24vdc to it.
DTBC     :Termination for relay and solenoid outputs. The relays outputs are divided as follows: Relay output #1 - #15 are either dry contact or 125vdc for solenoids (berg jumper selected), #16 and #17 are fused for solenoids such as 20CB or 20FD, #18 has a current limiting resistor for 20CF, and #19 - #30 are dry contact.
DTBD     :Termination for relay and solenoid outputs. The relays outputs are divided as follows: Relay outputs #30 - #46 are either dry contact or 125vdc for solenoids (berg jumper selected), #47 and #48 are AC contacts for ignition transformer power, #49 - #60 are dry contact.

PTBA     :Termination board for <P> core. The termination signals are as follows:
1.  Overspeed magnetic pickups
2.  Flame detectors
*************CAUTION****************
UV FLAME DETECTOR TUBE POLARITY MUST BE OBSERVED.
3.  Bus volts
4.  Generator volts and current
5.  Synchronizing
6.  Protective inputs
7.  Alarm horn enable and disable berg jumper location
QTBA     :Termination board for <RST> core. The termination signals are as follows:
1.  HP and LP magnetic pickups for speed
2.  Flow divider magnetic pickups
3. Water injection flow meters
4.  Servo valve outputs. The first 4 outputs are for the liquid fuel system, gas fuel system and nozzle control.
5.  LVDT excitation

*************CAUTION****************
DO NOT SHORT THESE OUTPUTS TO GROUND
6.  MW transducer
7.  Mounted on the TBQA board is a 9-pin RS232 connector for TIMN diagnostics.
TBCA    :Termination for <C> analog signals. The TCBA has 30 inputs for 3-wire RTDs
TBCB      :Termination for <C> analog signals. There are 22 inputs for milliamp transducers and 14 inputs for 3-wire RTDs
TBQA     :Termination for <C> or <RST> thermocouple signals. The TBQA has 42 inputs for thermocouple terminations and cold junction compensation. 
TBQB     :Termination for <RST> analog signals. The termination signals are as follows:
1.  Diesel speed
2.  Compressor discharge transmitters (CPD)
3.  Fuel pressure transmitters (P2)
4.  Vibration transducer (seismic)
TBQC     :Termination for <RST> analog signals. The termination signals are as follows:
1.  Milliamp signals
2.  LVDT input signals
3.  Current outputs
TBQD     :Termination for <RST> extended analog signals. The termination signals are as follows:
1.  Proximitors
2.  LVDT input signals
3.  Current outputs                                        

 

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