Description
Technical Specifications
| Feature | Specification |
| Model Number | 745-W2-P1-G1-HI-A-R-E |
| Winding Support | 2-Winding Transformer Support |
| Phase Current Inputs | 1A / 5A (Programmable) |
| Ground Current Input | 1A / 5A (Programmable) |
| Power Supply | HI: 88 – 300 VDC / 70 – 265 VAC |
| Analog Outputs | 4 – 20 mA (Hardware Option A) |
| Relay Outputs | 8 Standard Form-A Outputs |
| Digital Inputs | 16 High-Speed Configurable Inputs |
| Communication | RS232, RS485, and Optional Ethernet |
| Protection Functions | 87T, 50/51, 50N/51N, 49, 24, 63, 86 |
| Mounting | 19-inch Rack Mount (Horizontal) |
| Operating Temperature | -40°C to +60°C |
The 745-W2-P1-G1-HI-A-R-E is a high-speed, three-phase microprocessor-based relay specifically engineered for the comprehensive protection and management of power transformers. This configuration features 2-winding differential protection, a high-voltage power supply, and integrated analog outputs for seamless telemetry integration. By utilizing advanced percentage differential elements and harmonic restraint logic, the 745 prevents nuisance tripping during magnetizing inrush while providing rapid fault detection to minimize equipment damage and maintain grid stability.
Product Comparison: 745 vs. 735 series
The 745 Transformer Management Relay provides several critical functional upgrades over the simpler 735 or early SR-series protection devices:
- Harmonic Restraint: The 745 includes sophisticated 2nd and 5th harmonic restraint algorithms to distinguish between internal faults and transformer inrush or overexcitation, a feature often absent in basic overcurrent relays.
- Winding Compensation: Unlike manual calculation methods required for legacy relays, the 745-W2-P1-G1-HI-A-R-E automatically performs magnitude and phase angle compensation for various transformer types and vector groups.
- Integrated Diagnostics: This model offers advanced transformer life-cycle monitoring, including accumulated loss-of-life calculations based on ambient temperature and loading, which is not available on the standard 735 protection units.
Recommended Stock: Top 12 Industrial Automation Models
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One year warranty, special discount after sale
The company focuses on DCS, PLC, robot, large servo four systems
The main products are all kinds of module/card, controller, touch screen, servo drive
The company's advantages: the supply of imported original products, professional production of accessories
Fast delivery time, complete supply, The seller has more than $1526000 worth of industrial control products inventory
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[service contact information]
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