General Electric IS200TGENH1A Mark VI Speedtronic Termination Board

Description

The IS200TGENH1A is a terminal board generator monitor designed by General Electric as part of the Mark VI Speedtronic turbine control system series. This termination board functions as the primary interface that collaborates with a core VGEN processor board to track three-phase generator voltages, bus voltages, and generator currents. Through these monitored signal sets, the processing architecture computes overall three-phase power, current frequencies, and the net system power factor. The IS200TGENH1A features an integrated hardware arrangement comprising magnetically isolated current transformer (CT) inputs alongside potential transformer (PT) inputs, enabling full data collection across simplex and triple modular redundant (TMR) control layouts. To support diverse auxiliary control tasks, the device includes four adjustable analog inputs, a collection of local protective metal oxide varistors (MOVs), and discrete relays positioned centrally on the board surface. The entire printed circuit assembly is layered with a thin conformal coating to secure long-term component health when implemented within heavy utility power plants or steam turbine applications.

Features

• Communicates directly with VGEN processors to compute three-phase power variables, frequency tracking, and power factors
• Formulated under a normal hardware assembly standard matching Mark VI system group one allocations
• Outfitted with a thin, complete layer of conformal PCB protective coating over the board footprint
• Features one long black terminal block alongside three smaller black terminal blocks for secure field connection loops
• Integrates four large, square black relays containing specialized yellow centers directly in the middle of the PCB layout
• Protects analog paths with an integrated array of at least six circular red metal oxide varistors (MOVs)
• Hosts three single-phase magnetically isolated current transformer (CT) inputs accepting high continuous ranges
• Employs non-pluggable CT termination block points using captive lugs to maintain safety against open-circuit accidents
• Includes three round white wire inductors covered with fabric, lined up vertically on the lower section
• Features onboard diagnostic limits with automated open-wire detection paths and monitored relay coil currents
• Equipped with three edge connector ports designated as JT1, JS1, and JR1, each hosting an independent electronic read-only ID chip

Applications

• Large steam turbine generator monitoring and power factor calculation
• Three-phase potential transformer and current transformer telemetry interfacing
• Simplex or triple modular redundant (TMR) turbine control panel integrations
• High-reliability analog transducer signal distribution

Technical Specifications

Connections/Interfaces

Installation Guidelines

• Input Configuration: Configure the J1A through J4A jumpers to specify whether the analog input channels 1 through 4 should receive current inputs or voltage inputs.
• Return Path Configuration: Use jumpers J1B through J4B to define whether the return path of the corresponding analog channel is tied to common ground or left open based on your grounding scheme.
• Current Transformer Wiring: Connect your CT sensor lines exclusively to the special terminal blocks TB2, TB3, and TB4, tightening the captive lugs securely around wires up to #10 AWG to eliminate any risk of open-circuit damage.
• Redundant Interconnection: In simplex systems, connect a single interface cable from the board to the VGEN processor. For triple modular redundant (TMR) system layouts, run three distinct wires from connectors JR1, JS1, and JT1 to three separate VGEN processor boards.