GE IS200EPCTG1AAA

The IS200EPCTG1AAA is the PT/CT front-end isolation acquisition board of the EX2100 excitation system, which collects the voltage and current of the generator, electrically isolates strong current, and provides measurement signals for AVR voltage regulation and generator protection. It is mostly used in GE Mark VI gas turbine/steam turbine generator sets. It is installed on the VME rack in the power plant excitation control cabinet and needs to be configured and calibrated in conjunction with ToolboxST. It is a very common board card in the spare parts of the power generation control system.

Hardware and basic parameters

1. Board card type: VME rack-mounted card, installed in Mark VI control cabinet

2. Input channel configuration:

1. 2 groups of three-phase PT voltage input
2. 2 groups of three-phase CT current input, CT can be selected in 1A/5A specifications
3. 1 independent analog input

3. Built-in components: Multiple sets of isolation transformers included voltage isolation, current isolation, and isolation between the secondary and control weak current of the transformer

4. Terminal interface: 3 sets of terminal blocks on the front; The back panel features three pin connectors J305/J308/J315, connecting the EMIO board of the rack.

5. Load: CT/PT input load < 1VA; Supports a maximum cable length of 305 meters, 12AWG shielded twisted-pair cable for PT, and 10AWG cable for CT.

6. Working environment: -30℃ to +65℃, installed in an indoor control cabinet, free from condensation and humidity

Product Advantages

1. High electrical isolation, strong anti-interference

Independent isolation transformer design, suppressing surges and common-mode interference in the strong electromagnetic environment of power plants, protecting expensive main control EMIO/CPU boards; CT open-circuit protection reduces the risk of high voltage in CT open-circuit.

2. Dual Redundant Measurement channels

Two independent acquisition channels of dual PT and dual CT, supporting redundant configuration; Multiple EPCT boards can be used in parallel to meet the requirements of the TMR three-redundant Mark VI unit, and the machine will not trip in case of single-point acquisition failure.

3. High precision and low load

The input load of CT/PT is less than 1VA, reducing the load on the on-site transformer, ensuring the accuracy of voltage and current measurement, and providing long-term stable guarantee for the AVR regulation accuracy.

4. Long-distance cable Compatibility

Supports transformer wiring up to 305 meters. It can be directly used in power stations where the generator is far from the control cabinet without the need for additional signal relays.

5. Mature and stable, with complete supporting facilities

Specifically designed for the native matching of the GE Mark VI+EX2100 excitation system and widely used in the existing units of power plants; It is used in conjunction with ToolboxST software for configuration, calibration and diagnosis.

6. Faults can be diagnosed and easy to maintain

The board card is equipped with fault status feedback. The alarm code can locate whether it is a PT disconnection, a CT fault or damage to the board card itself, which is convenient for maintenance and replacement.

Application scenarios

Only compatible with GE Mark VI + EX2100 excitation system, used for excitation control of synchronous generators

1. Gas turbine power plant: GE heavy-duty gas turbine combined cycle unit generator

2. Steam turbine generator set: Thermal power, self-owned power station steam turbine generator EX2100 excitation system

3. Industrial self-owned power plants: Chemical plants, steel mills, and large factories' self-owned synchronous generator sets

4. The small hydropower synchronous generator is equipped with the EX2100 excitation system as an option

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