Description
Product Overview
IS200EXAMG1BCB is the Exciter Attenuation Module (EXAM) designed for GE Vernova Speedtronic Mark VIe EX2100e generator excitation system. The suffix BCB stands for a specific hardware revision variant. The board collects high-voltage field signals from the excitation rectifier bridge, attenuates and scales high-amplitude field voltage and field current down to safe low-level analog signals that the Mark VIe control board can process. It works together with IS200EGDM exciter ground detector module to implement excitation winding ground fault detection for the generator excitation loop.
Technical Specifications
| Item | Parameter |
|---|---|
| Manufacturer | GE / GE Vernova |
| Part Number | IS200EXAMG1BCB |
| Product Type | Exciter Attenuation Module (EXAM) |
| Compatible Platform | Speedtronic Mark VIe, EX2100e Static Excitation System |
| Power Supply | Rack backplane powered, +5VDC, ±15VDC |
| Signal Function | High voltage field signal attenuation, scaling and isolation |
| Partner Module | IS200EGDM Exciter Ground Detector Module |
| Mounting | Installed inside excitation high-voltage interface cabinet rack |
| Operating Temperature | -30 °C ~ +70 °C |
| Humidity | 5%–95% RH, non-condensing |
| Weight | Approx. 1.6 kg |
| Revision Note | BCB hardware variant, pin compatible with IS200EXAMG1B base series |
Key Features
- High Voltage Signal Attenuation: Reduces high field voltage/current signals from the thyristor rectifier bridge to low-voltage analog measurements for the Mark VIe controller, protecting low voltage control circuits.
- Excitation Ground Fault Detection: Cooperates with EGDM module to monitor generator field winding insulation and detect field earth faults.
- Galvanic Signal Isolation: Provides electrical isolation between high-power excitation circuits and low-voltage control logic to suppress EMI and prevent high voltage surge damage to core control hardware.
- Onboard Diagnostics: Continuously monitors signal integrity, circuit health and reports faults to Mark VIe via ToolboxST, with status indicators for maintenance inspection.
- TMR Excitation Rack Compatibility: Suitable for triple modular redundant EX2100e excitation control architecture for power plant generator protection.
- Revision Interchangeability: IS200EXAMG1BCB can replace other IS200EXAMG1B revisions, but firmware and configuration validation is mandatory before commissioning.
Applications
- Combined-cycle power plant EX2100e static excitation cabinets
- Steam / gas turbine generator excitation monitoring and field ground fault protection
- Hydroelectric generator Mark VIe excitation control systems
- Captive industrial power station generator voltage regulation systems
- Power plant generator rectifier bridge high-side signal measurement
Installation & Maintenance Notes
- ESD anti-static protection must be used during removal, transport and installation of the PCB.
- Fully de-energize and implement lockout/tagout procedures for the excitation cabinet before module replacement; high dangerous voltage exists on related field wiring.
- Verify all high voltage signal wiring and terminal tightness after installation.
- After power restoration, use ToolboxST to check board diagnostics, field measurement values and ground fault detection function.
- During scheduled overhaul, inspect resistors, capacitors and connectors for thermal aging and corrosion.
- Confirm firmware version and excitation logic settings when swapping between different EXAM hardware revisions.
FAQ
Q: What is the difference between IS200EXAMG1BCB and IS200EXAMG1B? A: IS200EXAMG1B is the base part series; BCB is one of its hardware revisions. Mechanically and functionally interchangeable for most EX2100e installations, but site configuration review and function test are required before direct replacement.
Q: Can this EXAM board be used on legacy Mark VI (non-VIe) EX2100 system? A: No. IS200EXAMG1BCB is designed exclusively for Mark VIe / EX2100e excitation platform and is not compatible with older Mark VI hardware.
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