GE DS200PTCTG1A PTCT Input/Output Board: Features and Applications

April 02,2025

DS200PTCTG1A PTCT Input/Output Board Introduction

The GE DS200PTCTG1A is a voltage transformer (PT) and current transformer (CT) input/output board designed for use with GE's EX2000 excitation system. This specialized board plays a vital role in isolating, scaling, and conditioning voltage and current signals from PTs and CTs, ensuring accurate measurement and control in power generation and industrial applications. In addition, it supports low voltage (10V DC) and current signal inputs (4-20 mA), making it extremely versatile for a variety of monitoring and protection functions.

Key Features and Technical Specifications
The DS200PTCTG1A provides a wide range of reliable signal processing functions:
Voltage signal processing:
Six high-precision transformers with a secondary rating of 1.6 Vrms (primary rating of 120 Vrms).
Each primary connection has a dedicated terminal block.
Test points (TP1-TP12) for voltage signal measurement.
Current signal processing:
Three CTs with load resistors (R10-R12) for voltage measurement on the secondary side.
Test points (TP13-TP18) for monitoring current signals.
Low voltage and current inputs:
can be configured as 10V DC or 4-20 mA inputs via jumper settings (BJ nomenclature).
Current output:

transmits a 4-20 mA signal to the TCCB board via connector JKK.

Applications in power generation and industrial systems

The DS200PTCTG1A is widely used in:
Generator excitation control: Ensures accurate voltage and current feedback to the excitation system.
Protection relays: Provide isolated signals for overcurrent and overvoltage protection.
Power monitoring: facilitates accurate measurement of electrical parameters in substations.

Industrial Automation: Integrates with control systems for process monitoring and control.

Installation and Configuration
Wiring Terminals: Dedicated terminals for each PT and CT input ensure safe wiring.
Jumper Settings: Adjustable to 10V DC or 4-20 mA input mode.
Test points: for easy troubleshooting and signal verification.

Output to TCCB: 4-20 mA signals are passed through the JKK connector for further processing.

Advantages of using the DS200PTCTG1A
High accuracy: Ensures accurate signal scaling for reliable measurements.
Isolation protection: prevents noise interference and ground loops.
Flexible input options: Supports both voltage and current signals.

Easy maintenance: Test point and jumper configurations simplify diagnostics.

Conclusion

The GE DS200PTCTG1A PTCT I/O Board is a robust and precise solution for handling PT and CT signals in power generation and industrial applications. Its ability to isolate, scale, and condition electrical signals makes it indispensable for excitation systems, protective relaying, and power monitoring.

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