Product Description
Woodward XD1G11 Generator Differential Protection Relay
Product Overview
- The Woodward XD1G11 is a digital Generator Differential Protection Relay designed for high-precision protection of synchronous generators in power generation applications, such as power plants, industrial facilities, and marine systems. Part of Woodward’s XD1 series, this microprocessor-based relay provides differential protection to detect internal faults within the generator or its associated transformer, ensuring rapid fault isolation to prevent equipment damage. The "G11" designation indicates specific configurations, typically with a focus on generator differential protection and a 1 A or 5 A current input (configuration-dependent). The XD1G11 offers advanced protection algorithms, fault diagnostics, and communication capabilities for integration into modern power management systems. Compared to Woodward’s multifunction relays (e.g., MRI4A0AB), feeder protection relays (e.g., MRI3I5E5DM), or genset controllers (e.g., EasyGen-3500-5, 8440-2087), the XD1G11 is specialized for generator differential protection, not feeder, motor, or engine control. It is distinct from Woodward’s excitation systems (e.g., DECS-100-B15), electronic governors (e.g., DYN1-10784-003-0-12), actuators (e.g., 8408-921), and other modules (e.g., 5466-1510 CPU).
Technical Specifications
- The XD1G11 has the following specifications based on industry sources and Woodward documentation:
| Specification | Details |
|---|---|
| Model/Part Number | XD1G11 |
| Manufacturer | Woodward |
| Description | Digital Generator Differential Protection Relay |
| Series | XD1 |
| Function | Protects synchronous generators against internal faults using differential protection |
| Processor | Microprocessor-based (specific architecture not publicly detailed) |
| Memory | Flash: 8–16 MB (for firmware and configuration) RAM: 4–8 MB (for runtime data) |
| Display | LED indicators; optional external HMI or PC interface for configuration |
| Inputs | 6 current inputs (3 per side, 1 A or 5 A nominal, configurable, 0.1–40 A range) 2 discrete inputs (24 VDC) |
| Outputs | 4 relay outputs (dry contact, up to 250 VAC/5 A) 1 analog output (optional, 4–20 mA) |
| Communication Interfaces | 1 serial port (RS-485, Modbus RTU) CANbus (optional, for integration with control systems) Ethernet (optional, Modbus TCP/IEC 61850) |
| Protection Functions | Differential protection (87G), overcurrent (instantaneous and time-delayed), restricted earth fault (optional), backup overcurrent |
| Trip Accuracy | ±2% of set value (differential current), ±5% (overcurrent) |
| Protection Settings | Configurable differential bias, trip thresholds, time delays, and characteristic curves |
| Redundancy | Non-redundant |
| Diagnostics | Fault detection, event logging (up to 200 events), disturbance recording, status LEDs |
| Compatibility | Compatible with Woodward control systems (e.g., EasyGen-3200-5, 8440-2050), SCADA systems, and third-party devices via Modbus or IEC 61850; suitable for generator and transformer protection |
| Power Supply | 24–250 V AC/DC (universal input) |
| Power Consumption | Approx. 5–10 W |
| Environmental Specifications | Operating Temperature: -25°C to +70°C (-13°F to +158°F) Storage Temperature: -40°C to +85°C (-40°F to +185°F) Relative Humidity: 5% to 95% non-condensing Vibration: IEC 60068-2-6 compliant Shock: IEC 60068-2-27 compliant |
| Enclosure | IP40 (with proper enclosure); IP20 (rear) |
| Dimensions | Approx. 120 mm (H) x 130 mm (W) x 100 mm (D) |
| Weight | Approx. 0.8–1.2 kg |
| Mounting | Panel-mounted or DIN rail |
| Certifications | CE, UL, CSA, marine certifications (e.g., DNV, ABS, configuration-dependent); IEC 61850 compliance (optional) |