IS230TGNAH1A - Turbine-Generator Terminal Board

SPECIFICATIONS:

Part Number: IS230TGNAH1A
Manufacturer: General Electric
Series: Mark VIe
Inputs to TGNA: 3
Product Type: Turbine-Generator Terminal Board
Generator current inputs: 0 to 5 A
Analog inputs Current inputs: 4-20 mA
Analog output current: 0-20 mA
Size: 15.9 cm high x 17.8 cm wide
Frequency: 50 or 60 Hz
Repair: 3-7 days
Availability: In Stock
Weight: 2 lbs
Country of Origin: United States
Manual: GEH-6721G

FUNCTIONAL DESCRIPTION:

IS230TGNAH1A is a Turbine-Generator Terminal Board manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Turbine Control Systems. The Turbine-Generator terminal board (TGNA) acts as a signal interface board for the Mark VIe I/O pack PGEN. In the Mark VI system, the VGEN board works with TGEN. The TGNA provides a direct interface to three analog inputs for sensing turbine steam pressure and three current transformer (CT) feedbacks for sensing generator current. The three analog inputs are configurable to be 4-20 mA, +/- 5 V, or +/-10 V inputs. There are two jumpers for each analog input. One jumper is used to select either current (4-20 mA) or voltage feedback. The other jumper can optionally ground the return path for the inputs. The three CT inputs can be fed from 1 A or 5 A-rated CT outputs. A separate terminal board point is provided for the two different amp-rated inputs. Configuration parameter CT_Secondary designates which terminal board points are used. The signals are passed on to the Mark VIe I/O packs through a 37-pin connector. The TGNA can be used for either simplex or TMR applications. TMR applications fan the signal to three I/O packs.

INSTALLATION:

Voltage-output sensors should use VDCx and Retx as signal connection points. Jumper JP1(3,5) should be in the voltage I/P position. JP2(4,6) should be in the differential input position for differential feedback and the Return to the GND position for sensors supplied with the 24 V output. The configuration parameter InputUse for the analog inputs should be set according to the type of sensor being used, +/-10 V, +/-5 V, or 4-20 mA. Current-based sensors should use IDCx and Retx as signal connection points. Jumper JP1(3,5) should be in the 4-20 mA I/P position. JP2(4,6) should be in differential input position.

OPERATION:

PGEN monitors the generator's 3-phase current and turbine mechanical power to provide the PLU over-speed control for large steam turbines. Three single-phase CT inputs are provided with a normal current range of 0 to 5 A continuous or 0 to 1 A continuous. The CTs are magnetically isolated on TGNA. CTs connect to non-pluggable terminal blocks with captive lugs accepting up to #10 AWG wires. The total generator current is calculated from these inputs. The three analog inputs accept a 4-20 mA input source is available for all three circuits with individual current limits for each circuit. The 4-20 mA transducers can use the +24 V dc source from the turbine control or a self-powered source. A jumper on TGNA selects between current and voltage inputs for each circuit. In a TMR system, analog inputs fan out to the three I/O packs (PGEN). The 24 V DC power to the transducers comes from all three PGEN packs and is diode-shared on the TGNA.

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FREQUENTLY ASKED QUESTIONS:

What are the primary electrical standards for turbine-generator terminal boards?

Turbine-generator terminal boards are typically designed to comply with international electrical standards such as IEC 60947-1 (for low-voltage switchgear), IEC 60034 (for rotating electrical machines), and ANSI C37 (for electrical components and systems).

What is the typical current rating of a turbine-generator terminal board?

The current rating of a turbine-generator terminal board can vary widely depending on the power output of the generator and the application. Typically, these terminal boards are rated for current flows ranging from 100 A to 5000 A or more, depending on the capacity of the turbine and generator.

What types of connectors are used in turbine-generator terminal boards?

Turbine-generator terminal boards use screw-type connectors, spring-loaded connectors, or bolt-on connectors, depending on the application. These connectors are designed for easy maintenance and provide a secure and reliable electrical connection.