Description
1. Product Title
Woodward XD1‑G11‑ Generator‑Motor Differential Protection Relay
2. Product Overview
The XD1‑G11 is a high‑speed electronic differential protection relay manufactured by Woodward, designed to detect internal winding faults for generators, large motors and rotating power assets. This device continuously compares incoming and outgoing current values from protected equipment; when abnormal differential current arises, it outputs fast trip signals to circuit breakers. XD1‑G11 features wide‑range universal auxiliary power input, front‑panel LED status indicators and SPDT relay output contacts. Built‑in galvanic isolation suppresses substation electromagnetic interference. It minimizes equipment damage caused by short‑circuit and winding faults, prevents catastrophic power‑asset failure, and improves safety and continuity for power‑generation and industrial drive installations.
3. Technical Specifications
- Brand: Woodward
- Model: XD1‑G11
- Warranty: One Year
- Condition: 100% New & Original
- Measured Rated Current: 1 A / 5 A, 50‑60 Hz
- Auxiliary Power: AC 35‑275 V, DC 19‑390 V wide‑range input
- Trip Output: SPDT relay contact
- Minimum Operating Time: 30 ms fast fault response
- Operating Temp: ‑20 °C to +70 °C
- Storage Temperature: ‑40 °C to +85 °C
- Enclosure: IP20, DIN‑rail mounting
- Feature: Front‑panel LED fault indication, high impulse‑withstand capability
- Compliance: IEC 255‑4, VDE 0435 standards
5. Application Scenarios
- Thermal Power Plant Generator Protection: Mounted inside generator‑control cabinets, providing main differential protection for synchronous generator stator winding internal faults.
- Heavy‑Duty Industrial Motor Protection: Deployed for large high‑voltage drive motors in petrochemical and metallurgical plants, detecting winding short‑circuit faults and initiating rapid tripping.
- Cogeneration & Distributed Power Facility: Integrated in switchgear panels for small‑to‑medium‑size generating units, delivering reliable differential fault detection for island‑mode power assets.
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