Why, downstream of a single-phase circuit-breaker, does Caneco BT propose a circuit-breaker with a higher breaking capacity (e.g. C60L single-phase downstream of a C60N)?

Catégorie FAQ: 
Calculs et normes

When calculating the protection, Caneco BT takes the temperature de-rating into account.
For the same consumption, but at a different temperature of installation, an over-requirement circuit-breaker might in principle be proposed.

Example: for a working current Ib=16.1A at 30°C, Caneco BT will suggest a C60L 16A as this is designed to withstand up to 16.9A, whereas the C60N doesn’t go above 16A.