ABB RET670 1MRK004816 – AC Protection and Control Relay Module

The ABB RET670 (1MRK004816 – AC) is a protection, control, and monitoring relay module belonging to ABB’s RELION series, primarily used in power systems for the protection, monitoring, and control of electrical equipment and lines3. It is designed for reliable protection and control of all types of power transformers and reactors6. The RET670 offers customized or pre – configured protection solutions for any transformer and shunt reactor application6. With its extremely fast differential protection function featuring automatic CT ratio matching and vector group compensation, it is the ideal choice for demanding applications6. Moreover, one RET670 IED can be extended to have two differential protection functions to safeguard the most advanced system configurations6. This module also has several functions for local and remote apparatus control on all sides of the transformer, and secure bay – wide and station – wide interlocking to prevent dangerous or damaging switchgear operations and ensure personnel safety6.