Power transformers are among the most critical and valuable assets in electrical power systems. Protecting them requires highly reliable, fast, and intelligent protection solutions. The ABB RET670, order code 1MRK004816-AB, is a sophisticated transformer protection and control relay designed to meet the demanding requirements of modern power grids and substations.
This article provides a comprehensive overview of the ABB RET670, covering its functionality, key features, applications, and the reasons it is widely trusted in utility and industrial power systems worldwide.
The ABB RET670 is part of ABB’s renowned Relion® 670 series, a product family engineered for advanced protection, control, measurement, and monitoring of power system equipment. Specifically developed for two-winding and three-winding power transformers, the RET670 delivers fast fault detection, secure operation, and extensive system diagnostics.
With the order code 1MRK004816-AB, this relay configuration is tailored to support high-performance transformer protection schemes while ensuring seamless integration into digital substations.
The ABB RET670 provides comprehensive protection and control functions that safeguard transformers against internal and external faults.
High-speed differential protection ensures fast and selective tripping during internal transformer faults, minimizing damage and downtime.
Sensitive earth fault detection enhances protection for transformer windings and improves overall system security.
Provides dependable backup protection for downstream faults or in case of primary protection failure.
Monitors transformer loading and thermal stress to prevent insulation aging and overheating.
Supports circuit breaker control, status indication, measurements, event recording, and fault analysis.
