Description
The GE Multilin 745-W2-P1-G1-HI Transformer Management Relay is a microprocessor-based protection and monitoring device designed for two-winding transformer applications. It provides transformer differential protection, overcurrent protection, monitoring, diagnostics, and control functions for utility and industrial power systems.
The 745 relay combines transformer protection with advanced management features, including winding temperature monitoring, harmonic restraint, fault recording, metering, and communication capabilities. The W2-P1-G1-HI configuration specifies a two-winding transformer model with 1 A phase current inputs, 1 A ground current inputs, and a high-range control power supply.
745-W2-P1-G1-HI
Product Specifications
| Parameter | Description |
|---|---|
| Brand | GE Multilin |
| Model | 745-W2-P1-G1-HI |
| Series | 745 Transformer Management Relay |
| Product Name | Transformer Management Relay |
| Product Type | Digital Transformer Protection Relay |
| Application | Two-winding transformer protection and monitoring |
| Transformer Configuration | W2 – Two windings per phase |
| Phase Current Input Rating | P1 – 1 A for all windings |
| Ground Current Input Rating | G1 – 1 A ground current inputs |
| Control Power Supply | HI – 90 to 300 VDC / 70 to 265 VAC |
| Protection Functions | Transformer differential protection, overcurrent protection, restricted ground fault protection |
| Monitoring Functions | Transformer loading, fault recording, metering, diagnostics |
| Communication Interface | Serial communication interfaces (system dependent) |
| Display | Front-panel LCD keypad interface |
| Mounting Type | Draw-out rack / panel mounting |
| Frequency | 50/60 Hz nominal |
| Operating Temperature | -40°C to +60°C |
| Place of Manufacture / Origin | Canada |
| Product Status | Legacy Industrial Protection Device |
| Dimensions | Approx. 264 × 213 × 178 mm |
| Weight | Approx. 7 kg |
| Country of Origin | Canada |
| Power Requirements | High-range AC/DC control power supply |
Key Features
✅ GE Multilin transformer protection relay
✅ High-speed transformer differential protection
✅ Supports two-winding transformer applications
✅ 1 A CT input configuration for phase and ground protection
✅ High-range auxiliary power supply version
✅ Built-in metering, event recording, and diagnostics
✅ Suitable for critical power system protection applications
Applications
• Power transformers
• Substation protection systems
• Industrial power distribution
• Generation plant auxiliary transformers
• Oil & gas electrical systems
• Mining and heavy industrial power networks
• Utility transmission and distribution systems
Frequently Asked Questions
❓ Q: What is the GE Multilin 745-W2-P1-G1-HI used for?
A: It is a transformer protection relay used to monitor and protect two-winding power transformers against electrical faults, overload conditions, and abnormal operating conditions.
❓ Q: What does the W2-P1-G1-HI code mean?
A: W2 indicates two windings per phase, P1 indicates 1 A phase current inputs, G1 indicates 1 A ground current inputs, and HI indicates the high-range control power supply option.
❓ Q: Is the GE 745 relay a PLC module?
A: No. It is a dedicated electrical protection relay designed for transformer protection and monitoring applications.
❓ Q: What protection functions are available on the 745 relay?
A: The relay provides transformer differential protection, overcurrent protection, restricted ground fault protection, monitoring, and diagnostic functions depending on configuration.
❓ Q: What control power does the HI version require?
A: The HI version supports approximately 90–300 VDC or 70–265 VAC control power.
Recommended GE Multilin Related Models
- GE Multilin 745-W2-P5-G5-HI – Transformer Management Relay with 5 A CT inputs.
- GE Multilin 745-W3-P1-G1-HI – Three-winding transformer protection relay.
- GE Multilin 745-W3-P5-G5-HI – Three-winding transformer relay with 5 A inputs.
- GE Multilin 745-W2-P15-G15-HI – Two-winding relay with mixed CT input ratings.
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- GE Multilin UR Series Universal Relays – Integrated protection relay platform.
