Calculator App

The HH Calculator enables you select a fuse protection for distribution transformers at voltage levels 6/10/15 and 20 KV for switch disconnectors in combination with fuses.

The SONN app helps with

• Medium-voltage transformers up to 36 KV
• Transformers from 50 KV – 2000 KVA
• Display of the current ratings
• Primary current
• Secondary current
• Fuse selection
• Selection of favourites

The SONN app provides specialists and experts with a mobile option for quickly preselecting transformer protection fuses.