GE IS200TRPSH1A IS200TRPSH1ACC | Primary Trip Terminal

Core Function and System Role

The GE IS200TRPSH1A terminates primary trip signals for Mark VI protection systems. Specifically, this board interfaces overspeed and over-temperature sensors. Moreover, it provides isolation between field devices and logic circuits. The IS200TRPSH1ACC variant includes conformal coating for harsh industrial environments.

Technical Specifications Overview

This primary trip terminal board features sixteen digital input channels. Each input accepts 24 Vdc trip signals from protection relays. Furthermore, the board provides eight relay outputs for trip initiation.

Parameter	Specification
Part Number	IS200TRPSH1A / IS200TRPSH1ACC
Type	Primary Trip Terminal Board / Protection Interface
Trip Inputs	16 Channels, 24 Vdc
Input Isolation	2500 Vrms Optocouplers
Input Impedance	3.9 kΩ
Response Time	<2 ms
Trip Relay Outputs	8 Channels, Form C (SPDT)
Output Voltage	125 Vdc / 250 Vac Maximum
Output Current	2 A per Channel (Resistive)
Status Indicators	24 Green LEDs
Power Supply	24 Vdc ±15%
Connector Types	2 x 50-pin D-sub, 3 x Terminal Blocks
Dimensions (W x H x D)	210 x 125 x 30 mm
Weight	0.75 kg
Onboard Energy Storage	8 x 100 µF, 35V Capacitors

Connector Layout and Component Count

The board uses three terminal blocks for field wiring connections. For instance, block TB1 handles trip inputs 1 through 8. Meanwhile, block TB2 manages trip inputs 9 through 16. Block TB3 hosts the eight trip relay outputs. Two 50-pin D-sub connectors interface with the controller. The IS200TRPSH1ACC adds a thick conformal coating over all components.

Energy Storage and Signal Integrity

This primary trip board includes local capacitance for stable operation. Specifically, eight 100 µF capacitors filter the 24 Vdc supply. Therefore, the board maintains reliable trip detection during power fluctuations. Additionally, onboard LED indicators show each channel’s status. For example, a green LED illuminates when a trip input is active. Yellow LEDs indicate energized trip relay outputs.

Diagnostic Features and Fault Detection

The board continuously checks each input channel for stuck conditions. Consequently, it detects welded contacts or wiring faults. Moreover, the GE IS200TRPSH1A IS200TRPSH1ACC includes output readback for relay verification. This feature confirms that trip relays actually change state. An onboard status register reports all channel health to the main controller.

Maintenance and Hot Replacement

You can replace this primary trip board without powering down the turbine. Thus, mean time to repair remains under ten minutes. The board stores no configuration data locally. Therefore, you simply install the replacement and resume normal trip monitoring.

Industrial Applications

This primary trip terminal board works inside GE Mark VI protection panels. For reliable GE trip signal termination, the IS200TRPSH1A and IS200TRPSH1ACC deliver exceptional performance. They provide robust interfacing for steam and gas turbine overspeed and over-temperature protection circuits.