GE IS200TGENH1A
Product Name: Generator Monitor (TGEN) Terminal Board
Overview: The IS200TGENH1A is a terminal board developed by GE under the Mark VI series. It communicates with the VGEN processor to monitor the three-phase voltage and currents of the generator, as well as to calculate the three-phase power and power factor. It collaborates with the VGEN processor and supports simplex and TMR applications.
Detailed content
Technical Specifications:
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Manufacturer: General Electric
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Series: GE Mark VI
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Function: Terminal Board Generator Monitor
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Generator and Bus Voltages: 115 V RMS nominal
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Nominal Frequency: 50/60 Hz
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Input Loading: Less than 3 VA per circuit
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Magnetic Isolation: Up to 1,500 V RMS
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Generator Current Inputs: Normal range 0 to 5 A, over-range up to 10 A
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Frequency Range of Interest: 45 to 66 Hz
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CT Inputs: Three single-phase CT inputs, magnetically isolated
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CT Terminations: Non-pluggable terminal blocks with captive lugs accepting wires up to #10 AWG
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Analog Inputs: Four inputs, configurable for 4-20 mA or 5, 10, 20 V DC via jumpers
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Physical Dimensions: 15.00 × 9.00 × 3.00 inches
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Weight: 4.00 lbs
Functional Features:
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Monitors two 3-phase generator and bus PTs, three 1-phase generator CTs, and four analog inputs
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VGEN converts signals and calculates power, power factor, and frequency
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Test points provided for all PT and CT inputs to verify phase in the field
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A +24 V DC source is available for all four analog input circuits, each with its own current limit
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Diagnostics check input signals for high/low hardware limits and high/low system software limits
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Voltage inputs have open wire detection; relay drivers and coil currents are monitored
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ID devices on connectors JR1, JS1, and JT1 contain serial number, board type, revision number, and plug location
Configuration: Jumpers J1A–J4A select either current or voltage input on analog inputs 1–4.
Working Principle: TGEN’s PT and CT inputs are monitored by VGEN, which converts signals and calculates power, power factor, and frequency. In simplex systems a single cable links one TGEN to VGEN; in TMR systems, TGEN connects to three VGEN boards through three distinct wires.
Application Scenarios: Gas turbine Speedtronic control systems; generator monitoring and control in power generation facilities.
Installation Requirements:
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Terminal block 1 is wired with analog current and PT inputs
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CT is connected to special non-removable terminal blocks TB2, TB3, and TB4 (this safeguards against an open CT circuit)
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Jumpers J1A and J1B set the desired input current or voltage on analog inputs 1–4
Usage Notes:
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The software limit check can be changed in the field
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Observe proper wiring to avoid open CT circuits — use only the dedicated non-pluggable terminal blocks for CT connections












