DB90 series are LV subscriber circuit breakers for power up to 36kVA, are used to protect people from indirect contact and equipment from isolation faults.
Selective differential models:
●Ensures total selectivity with high sensitivity of 30mA differential devices installed downstream so that only the start with an isolation fault is turned off;
●Enables installation of a lightning arrester immediately upstream of the circuit breaker without risk of untimely tripping of the latter;
●Enables service quality requirements to be taken into account by certain receivers such as freezer, computer equipment etc;
●Differntial devices with test button;
●Meets EDF requirements;
●Standard: NFC 62411;