Transformer Protection Relay by ABB HESG448614R1
Description
ABB HESG448614R1 Transformer Protection Relay is a digital protective relay designed for safeguarding transformers by detecting and responding to abnormal electrical conditions, including magnetising inrush currents and fault currents. While specific model details are limited, it aligns with ABB’s high-performance relay standards, integrating advanced protection, monitoring, and communication capabilities.
| Specification | Value |
|---|---|
| Frequency Operating Range | 5Hz to 95Hz |
| Supported Communication Protocols | IEC 61850-8-1, IEC 60870-5-103, TCP/IP, EIA-485 DNP 3.0, LON, SPA |
| Working Temperature Range | -25 degrees Celsius to +55 degrees Celsius |
| Protection Response Time | Less than 10 milliseconds (typical for ABB high-voltage relays) |
Key Features:
- Second harmonic restraint technology to differentiate magnetising inrush currents from actual fault currents, preventing unnecessary tripping
- Multi-function protection including overcurrent, overvoltage, undervoltage, stator ground fault, and rotor ground fault protection
- High-precision measurement capabilities with power value error below 0.5% and voltage/current error below 0.25%
- Modular design for easy integration with substation automation systems
Applications:
- Protection of extra high voltage (EHV) and high-capacity transformers in power grids
- Industrial and grid substations with frequent transformer energization requirements
- Power generation facilities to safeguard generator-connected transformers
Related Models:
- ABB REG670
- ABB RET670 1MRK004816-AC
- ABB REX640