Three-phase units require no interposing transformers

Used primarily to protect two or three winding power transformers, auto or generator-transformer units, KBCH type relays are very compact, thereby facilitating installation. Each model is a three-phase unit with internal vector group compensation and line current transformer ratio correction. There is no need for interposing transformers.

Space efficient and user friendly

The KBCH relays benefit from compact multi-functional numerical keys and built-in interposing CT. Optimally designed for space-efficiency they also provide user-friendly interfacing.