Selective differential automatic machines with built-in overcurrent protection are used for construction of selective (multistage) schemes of protection against differential current. They are designed for operation in single-phase alternating current circuits with voltage 230 V and frequency 50 Hz, designed for rated current from 20 A to 63 A.
Nominal tripping differential current (tripping set point) is 100 mA and 300 mA. They are used in distribution boards of residential and public buildings, flat boards, temporary power supply devices for construction sites, garden houses, garages.
Thanks to the improved design of the differential block and compact dimensions saves space in the switchboard.
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