Air-operated circuit breaker RDM108 series

overloadshort-circuitmotor protection

RDM108 series Moulded Case Circuit Breaker, is applied to the circuit of AC50Hz/60Hz,rated operational voltage up to 660V, rated current from 0.1A to 63A as the protection for low-capacity motor and circuit against overload and short-circuit, and works for unfrequnent circuit-transfering and direct motor-starting under normal conditions. And this production can start and break the motor directily which is under the whole voltage and AC-3 load against the overload and short-circuit. This production conforms to standard of GB14048.2 and GB14048.4. 3.2 Structure RDM108-20 has auxiliary contact, RDM108-32 can assemble one external auxiliary contact group, RDM108-63 can assemble one internal auxiliary contact group. The release mechanism of RDM108-32 and RDM108-63 has the quick closing and breaking structure, so it has the current-limit function. Bimetal time-inverse delay release and intanstaneous electromagnetic release. Overload release has temperature compensation device. In the front of product has the tripping current adjusting pointer, and tripping current is adjustable within the Specified range. Operational type of RDM108-20,-32,-63 is button operation, knob operation and handle operation respectivly. And this production is front board connecting, and board installation. RDM108-20, -32 has the installation board, it can install at the 35mm DIN Rail. Normal operational conditions and installation conditions 3.1 Altitude of Installation location shall not exceed 2000m. 3.3 Pollution class is 3 class. 3.4 Installation type: Main circuit is III, Auxiliary circuit and controll circuit is II. 3.2 Ambient Temperature shall not higher than +40ºC and below than -5ºC,