Fixed or withdrawable version
The fixed version of the circuit-breaker is more compact in size than the withdrawable version. It is recommended for installation that can tolerate service interruption in the event of faults or programmed maintenance.
The withdrawable version of the circuit-breaker is recommended for:
– applications that can only tolerate brief interruption due to faults or programmed maintenance;
– dual lines, one of which is a standby for the other, with a single circuit-breaker for each pair.