GE IS200EACFG1A  Exciter AC Feedback Board  

Part IS200EACFG1A Exciter AC Feedback Board produced by GE. This model supports up to 480 Vrms inputs and supports a single three-phase input voltage and uses 50/60 Hz to operate properly. 

This model bridges current feedback and ac voltage together.

The Exciter AC Feedback Board under the part number IS200EACFG1A is part of the EX2100 Series manufactured by General Electric Company. 

This specific model is a G1 version of the IS200EACFG modules. 

Part No.: IS200EACFG1A
Manufacturer: General Electric
Product Type: Exciter AC Feedback Board
Series: EX2100

The G1 version of this module can support an individual three-phase input voltage and will have a nominal range of 480 VRMS with a positive twenty percent at fifty to sixty hertz. 

The IS200EACFG1A module is also labeled within the EX2100 Series as an input/output terminal board. 

The module also handles most of the bridge AC voltage and current feedback as it measures the exciter power potential transformer (PPT) AC voltage supply. 

There are three transformers contained within the board that will measure voltage for three phases. 

The IS200EACFG1A can connect to an EBKP backplane model. 

When connecting the IS200EACFG1A and EBKP backplane boards a cable no longer than ninety millimeters in length will connect the boards. 

The three screw connectors which are labeled TB1, TB2, and TB3, on the IS200EACFG1A model are strictly used for voltage inputs. 

On the IS200EACFG1A there are three 9-pin connectors which are J504, J509, and J514, the connectors are used for the cables which will connect the EBKP backplanes for the EMIO boards.

IS200EACFG1A is an Exciter AC Feedback Board for the EX2100 excitation system. 

In the EX2100 Excitation Control, the Exciter Ac Feedback board (EACF) measures the exciter PPT AC supply voltage and current.

The terminal board comprises three-phase voltage measuring transformers as well as terminals for two Flux/Air core coils. 

The voltage and current circuits' outputs are fanned out to three DB9 connections for cabling to M1, M2, and C controllers. 

The connection connecting EACF to the EBKP backplane board might be as long as 90 meters.

The exciter auxiliary cabinet houses the EACF board. The board is available in three versions: EACFG1 for 480 Vrms inputs, EACFG2 for 1000 Vrms inputs, 

and EACFG3 for 1300 Vrms inputs.

For the flux/air core input signals, high-frequency noise reduction is provided near the signal entrance point. 

Where applicable, cable shield terminal screws connected to the chassis ground are situated within three inches of the input screws.

Exciter Voltage Measurement 

The G1 model accepts a single three-phase input voltage in the nominal range of 480 Vrms + 20% at 50/60 Hz.

The G2 model accepts a single three-phase input voltage in the nominal range of 1000 Vrms + 20% at 50/60 Hz.

At 50/60 Hz, the G3 version allows a single three-phase input voltage in the nominal range up to 1300 Vrms + 20%. (1400 V for revision BAA and later).

The secondary outputs of the potential transformers on both boards provide a nominal 1.6 Vrms.

Inputs for Air Core CT/Flux Coil

At 50/60 Hz, the air core current transformers give a nominal secondary output voltage of 0 to 0.8 Vrms.

Application Data

The three-phase voltage transformers are T1 through T4. Individual screw connectors TB1, TB2, and TB3 are for the voltage inputs. 

Terminal block TB4 is for wiring from the two Flux/Air core coils. 

The three 9-pin sub-D connectors, J504, J509, and J514 are for cables to the EBKP backplane for the EMIO boards.

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