Can I read CDD Directional Overcurrent Relay Overview on EtoBox?

CDD Directional Overcurrent Relay Overview by Anonymous HuHbq4OR is a document available to read on EtoBox.

What is CDD Directional Overcurrent Relay Overview about?

CDD relays provide directional phase and earth fault protection for ring mains, parallel transformers, and feeders. They contain an induction disc overcurrent unit with shaded coils and a directional induction cup unit. The cup unit only allows the disc to operate when fault current flows in the tripping direction. CDD relays are self-powered except models 21 and 31, eliminating the need for an auxiliary supply. They provide sensitive directional discrimination down to 1% rated voltage and consistent timing

Author

Anonymous HuHbq4OR

Language

EN