GE Fanuc IS200ESYSH1AAA Synchronizer Module (Mark VIe)

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Product Overview:
The GE Fanuc IS200ESYSH1AAA is a synchronizer (synchrocheck) module for the Mark VIe turbine control system. This module is used in generator breaker closing applications where the generator must be synchronized with the utility grid or another generator before the breaker is closed. It monitors the voltage magnitude, frequency, and phase angle difference between the generator and the grid, and only permits breaker closure when all parameters are within acceptable limits. This prevents damage to the generator and the grid caused by out-of-phase closing. The “AAA” suffix denotes the standard hardware revision.

Technical Specifications:
Series: GE Mark VIe Control System
Inputs: Generator Voltage (PT), Grid Voltage (PT), Generator Frequency, Grid Frequency, Breaker Status (Auxiliary Contact)
Outputs: Breaker Close Permit (Relay Output), Breaker Close Command (Relay Output), Synchrocheck Status (Digital Output)
Voltage Input Range: 0-120V AC (via PT) or 0-10V DC (scaled)
Frequency Range: 45 Hz to 65 Hz
Phase Angle Tolerance: ±10 Degrees (Configurable)
Voltage Tolerance: ±5% (Configurable)
Frequency Tolerance: ±0.1 Hz (Configurable)
Backplane Bus: GEnet (Mark VIe Backplane)
Operating Temperature: 0°C to +60°C
Power Consumption: < 3 Watts
MTBF: > 200,000 Hours

Functional Features:
Three-Parameter Synchrocheck: Simultaneously monitors voltage magnitude, frequency, and phase angle
Permissive Logic: Only issues a “Close Permit” signal when all three parameters are within limits AND the breaker is ready
Dead-Bus Detection: Detects loss of grid voltage and blocks breaker closure to prevent islanding
Slip Frequency Monitoring: Tracks the slip frequency (difference between generator and grid frequency) and calculates time-to-close
Break-Before-Make Logic: Ensures the old breaker is fully open before permitting the new breaker to close
Event Recording: Records all synchrocheck events (permit issued, permit denied, close executed) with millisecond time stamps

Performance Parameters:
Phase Angle Measurement Accuracy: ±0.5 Degrees
Frequency Measurement Accuracy: ±0.01 Hz
Voltage Measurement Accuracy: ±0.5%
Close Permit Response Time: < 20 ms (from conditions met to output active)
Isolation: Inputs to Outputs > 1500V DC

Material Composition:
PCB: 4-Layer FR-4
Voltage Sensing: Precision Potential Transformers (PTs) or Resistive Voltage Dividers
Isolation: Analog Devices AD202 Isolation Amplifiers
Relay Outputs: Omron G6K or Panasonic AQY Series Signal Relays (5A Contact Rating)
Connectors: Spring-Clamp Terminal Blocks for PT Inputs + DB9 for Digital I/O