The ABB REF615A_ 1G HAFNAEFCBGC1BQK11G feeder relay is a protective relay used in electrical power distribution systems to protect feeders and power transformers from faults such as overcurrent, earth fault, and phase imbalance.

The REF615A_ relay is part of ABB’s Relion 615 series of protection relays and is designed to provide high-speed and reliable protection for various types of power distribution equipment. It is equipped with advanced features such as current measurement, voltage measurement, and fault detection algorithms, which allow it to quickly detect and isolate faults in the system.

The 1G in the product code refers to the relay’s 1-phase and ground overcurrent protection capabilities, while the HAFNAEFCBGC1BQK11G designation represents the various options and settings available on the device.

The relay is designed to be easily configured and commissioned using ABB’s PCM600 relay software, which provides a user-friendly interface for setting up protection functions, communication protocols, and other parameters. It also includes a variety of communication interfaces such as Ethernet, RS-485, and IEC 61850, which enable it to communicate with other devices and systems in the power distribution network.

The REF615A_ relay is a versatile and reliable component for protecting power distribution systems from faults and ensuring safe and efficient operation.