GE IS200EXHSG3REC | EX2100 EXHS Exciter High‑Speed Relay Driver Board Mark VI Speedtronic

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GE IS200EXHSG3REC | EX2100 EXHS Exciter High‑Speed Relay Driver Board Mark VI Speedtronic

IS200EXHSG3REC is the EXHS (Exciter High‑Speed Relay Driver) printed‑circuit board manufactured by General Electric for GE Speedtronic Mark VI and EX2100 static excitation control systems. This heavy‑duty relay‑drive interface board receives low‑level logic commands from EX2100 main control boards, amplifies these signals to drive high‑speed protective relays and de‑excitation contactors within the generator field circuit. It also feeds back relay contact status back to the Mark VI controller for protection‑logic validation.

It handles critical time‑critical excitation protection actions including de‑excitation, field bypass and field‑breaker control. It is widely implemented in simplex, dual‑redundant and TMR triple‑modular‑redundant EX2100 installations. Power‑plant MRO departments source IS200EXHSG3REC for planned outage overhaul, excitation‑protection‑related trip repair, EX2100 cabinet retrofits and critical spare‑part inventory stocking. Original OEM production is discontinued; global supply is limited to new‑old‑stock surplus and fully refurbished bench‑tested units.

Key Features

• Dedicated EXHS high‑speed relay‑drive hardware for GE EX2100 excitation platform, multi‑D‑sub connectors for inter‑board cabling within excitation cabinet
• Converts low‑voltage logic control signals from main EX2100 controller into high‑current drive outputs for heavy‑duty field relays, de‑excitation contactors and bypass relays, achieves fast‑response protection switching for generator field circuits
• On‑board multi‑channel relay‑status feedback acquisition, monitors relay coil health and contact position, reports discrepancies and coil‑fault alarms to Mark VI HMI alarm list
• Integrated hardware protection: over‑current, short‑circuit suppression for relay drive channels to limit cascaded damage during field‑circuit anomalies
• Conformal‑coated heavy‑duty SMD PCB assembly with surge‑suppression and EMI filtering, engineered for high‑noise, vibration‑prone power‑plant cabinet environments
• Multiple built‑in power relays assembled on‑board, supporting direct high‑power switching for excitation safety loops
• Supports simplex, dual‑redundant and TMR triple‑modular‑redundant EX2100 excitation architectures
• Equipped with multiple D‑sub signal connectors for interconnection with DSPX, EMIO and other EX2100 subsystem boards; allows unit swap‑out during scheduled plant shutdown windows
• ESD‑sensitive power assembly; anti‑static handling procedures are mandatory for installation and servicing

Technical Specifications

• Part Number：IS200EXHSG3REC
• Manufacturer：General Electric (GE)
• Product Type：Exciter High‑Speed Relay Driver Board (EXHS)
• Compatible System：GE Speedtronic Mark VI, EX2100 Excitation Control System
• Core Function：High‑speed relay & de‑excitation contactor driving, relay‑status feedback monitoring, excitation protection‑loop signal conditioning
• Drive Output：High‑current outputs for field‑protection relays, de‑excitation and bypass contactor coils
• Input Control Logic：24 VDC logic commands from EX2100 main controller
• Mounting：Installed inside EX2100 excitation cabinet, inter‑board wired via multi‑pin D‑sub cables
• Operating Temperature：‑30 °C ~ +65 °C
• Storage Temperature：‑40 °C ~ +85 °C
• Humidity：5‑95 % non‑condensing
• Protection Class：IP20 (cabinet‑mount installation only)
• Interfaces：Multiple D‑sub connectors for control‑signal input, relay‑drive outputs and status feedback signals
• Status：OEM discontinued, available as NOS surplus & professionally refurbished tested units
• Handling Requirement：ESD‑sensitive component, ESD protective measures required

Typical Applications

1. Combined‑cycle power plant EX2100 generator excitation protection‑loop replacement for de‑excitation and bypass relay drive faults
2. Gas‑turbine Mark VI excitation cabinet EXHS hardware maintenance and spare‑part swap during scheduled unit outages
3. Steam‑turbine generator static‑excitation system overhaul and renewal of high‑speed protection‑switching hardware
4. Emergency repair for excitation trips triggered by relay‑drive failure, loss of de‑excitation function or contactor‑position feedback mismatch
5. Legacy EX2100 excitation‑system retrofit and spare‑part stocking for simplex, dual‑redundant and TMR power‑generation sites

Compatibility Notes

IS200EXHSG3REC is a specific suffix revision variant of the EXHS family. Before replacement, verify DSPX processor board revision, EMIO board hardware, EX2100 system firmware version and original project BOM. This board relies on cabling connections to other EX2100 control cards and cannot operate standalone. Do not interchange IS200EXHSG3REC with other EXHS suffix variants without engineering cross‑verification; different suffix revisions may present wiring‑pin and timing differences. Related EX2100 series boards include IS200EROCH1ABB, IS200ERDDH1ABA, IS200EPSMG1AED. Full part‑number suffix matching is strongly recommended to avoid hardware mismatch.

Product Condition & Supply Information

Original GE OEM production for IS200EXHSG3REC has been discontinued. Available inventory consists of new‑old‑stock surplus and professionally refurbished assemblies. Every unit shall complete comprehensive bench validation before shipment, including relay‑drive‑channel load testing, relay‑position‑feedback‑signal verification, over‑current protection test, D‑sub connector continuity check and fault‑alarm‑reporting validation.

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