Description
The ABB RET650 is a microprocessor-based digital protection relay designed for the protection of two- and three-winding transformers, autotransformers, generator-transformer units, and shunt reactors. It provides comprehensive protection, monitoring, and control functions for these applications.
Protection Functions
- Differential protection
- Overcurrent protection
- Earth fault protection
- Inrush protection
- Harmonic restraint
- Transformer overload protection
- Transformer differential protection
Monitoring Functions
- Transformer current and voltage
- Transformer active and reactive power
- Transformer temperature
- Transformer oil level
- Transformer gas pressure
Control Functions
- Transformer tap changer control
- Transformer cooling fan control
- Transformer feeder breaker control
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