IS200EPCTG1AAA GE Exciter Board Mark VI EX2100

IS200EPCTG1AAA GE Exciter PT/CT Board – Mark VI & EX2100 Product Introduction

Technical Specifications

• Brand: General Electric (GE)
• Model: IS200EPCTG1AAA
• Category: Exciter PT/CT (EPCT) Terminal Board
• Series: Mark VI Speedtronic / EX2100 excitation system
• Functional Acronym: EPCT
• Revision Total: 3 revisions
• Backwards Compatibility: First two revisions
• Assembly Type: Normal Assembly
• Number of Channels: 6
• Temperature Range: -30 to 65 °C
• Size: 8.6 cm wide × 16.2 cm high
• Country of Manufacture: United States of America
• Front Edge Terminal Strips: One 24-position strip and two 4-position strips
• Rear Edge Connectors: Three vertical pin connectors labeled J315, J305, and J308
• Test Points: 12 test points plus 8 voltage test points (TP1–8) on the isolation transformer secondary side
• On-Board Hardware: One jumper switch, 2 toroidal transformers, 4 frame-mounted transformers, resistors, capacitors, and metal oxide varistors (MOVs)
• Availability: In stock

Functional Overview

• The board handles critical generator voltage and current measurements through isolation transformers.
• It integrates two 3-phase generator potential transformer (PT) voltage inputs.
• It also includes two generator current transformer (CT) inputs with 1 A or 5 A options.
• All isolation transformer output signals travel by cable to the EMIO board.
• The board accepts a single analog input for either voltage or current signals.
• A redundant system can include up to three EPCT boards for robustness.
• Components T1 through T6 denote the voltage and current isolation transformers.

Voltage and Current Measurement Details

• Generator voltages pass from potential transformers through switches to TB1.
• PT inputs run at a nominal 115 V rms with 50/60 Hz frequency.
• These PT inputs carry fuses for protection against electrical anomalies.
• Two isolation transformers perform a three-wire open delta voltage measurement.
• Each transformer converts a 115 V rms input to a 1.533 V rms output.
• Generator current inputs connect to fixed terminal blocks TB2 and TB3.
• Each current transformer offers a 0–1 A rms winding and a 0–5 A rms winding.
• Only one winding wires to the EPCT board at a time.
• Cable lengths from the transformer to the board can reach 1000 ft.
• TB1 stays removable, while TB2 and TB3 remain fixed to prevent CT open circuits.

Test Points and Connector Routing

• Four voltage test points (TP9–12) sit on the generator current isolation transformer secondary side.
• Never ground these test points through the measuring device.
• Eight voltage test points (TP1–8) support diagnostics on the isolation transformer secondary side.
• In a simplex setup, voltage signals travel via J305 to the EMIO board in the M1 controller.
• In redundant configurations, signals distribute to J305, J308, and J315.
• These routes transmit to the M1, M2, and C controllers respectively.
• Three 25-pin sub-D connectors link to the EBKP backplane for data transfer.

Installation Guide

• Review the manuals or data sheets supplied with your OEM purchase before handling.
• Treat the board as static-sensitive and use anti-static protection at all times.
• Confirm the cable length stays within the 1000 ft limit using 12 AWG wire.
• Use wire gauges up to #10 AWG for current transformer cable runs.
• Keep the measuring device isolated from the TP9–12 test points during checks.
• Verify J305, J308, and J315 seating against the EBKP backplane connectors.

Packing List

• One IS200EPCTG1AAA Exciter PT/CT terminal board
• Anti-static protective packaging material
• Original GE manual or data sheet reference where available
• Shipping through FedEx, UPS, or DHL

FAQ

• Q: What is the condition of this board?
  A: We supply brand new original units.
• Q: Do you have stock available?
  A: Yes, we hold this item in stock.
• Q: How fast do you ship?
  A: We dispatch within 5 days of your order.
• Q: Which logistics partners do you use?
  A: We ship through common carriers such as DHL, FedEx, and UPS.
• Q: Can I return the product?
  A: Yes, we support returns within 30 days.
• Q: How many revisions does the IS200EPCTG1AAA have?
  A: GE released three revisions, and the first two stay backwards-compatible.
• Q: What temperature range does the board support?
  A: It operates from -30 to 65 °C.
• Q: How many channels does the board provide?
  A: The board provides 6 channels.
• Q: What PT input voltage and frequency does it accept?
  A: The PT inputs accept a nominal 115 V rms at 50/60 Hz.
• Q: What CT current options does the board offer?
  A: Each current transformer offers 1 A or 5 A rms windings.
• Q: How long can the cables run?
  A: Cable lengths can reach 1000 ft using 12 AWG wire.
• Q: Can I ground the TP9–12 test points?
  A: No, never ground them through the measuring device.
• Q: How many EPCT boards can a redundant system use?
  A: A redundant system can include up to three EPCT boards.
• Q: Where does GE manufacture this board?
  A: GE manufactures this board in the United States of America.