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ABB RET670 1MRK004816-AC transformer protection relay is designed for the integrated protection of transformers and other power system equipment.
The RET670 can be applied to various transformer configurations:
Two-Winding Transformers (Single and Multi-Breaker Arrangements)
Three-Winding Transformers (Single and Multi-Breaker Arrangements)
Autotransformers and Shunt Reactors
Generator-Transformer Units.
Key Features：
Part of ABB's Relion protection and control product family
Designed for transformer differential protection
Supports local and remote apparatus control
Provides secure interlocking.
The RET670 offers several protection functions, including:
Differential Protection
Earth-Fault Protection
Distance Protection
Overcurrent and Thermal Protection
Breaker Failure Protection.
Additional Features：
CT Saturation and Inrush Current Restraint
5th Harmonic Restraint
Sensitive Differential Protection
Temporary Desensitization.
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