Generator Protection

Hitachi Energy offers a complete portfolio of generator protection solutions for all types and sizes of generators and generator-transformers units. As members of the Relion protection and control product family, the generator protection IEDs REG670 and REG650 are designed to implement all the core values of the IEC 61850 standard. The protection IEDs also support other types of interfaces to the plant control system.

A generator protection system with REG670/650 meets the requirements for maximum dependability and availability. The differential protection internal/external fault discriminator is based on negative sequence current values, enabling fast and selective decisions to operate.

The unique main protection functions are able to selectively detect and clear all fault types over 100% of the stator winding. The detection criteria can be used to create intelligent, application‑specific functions to enhance your protection system, enabling it to meet very specific requirements, for instance, when the operating conditions of the plant change.