ABB Undervoltage Release for Sace Formula DSA Series
Caution
Product Description
Service releases.
The cabled shunt opening release SOR-C allows for opening of the circuit-breaker by means of a non-permanent electrical control. Operation of the release is guaranteed for a voltage between 70% and 110% of the power supply rated voltage value Un, in both alternating and direct current. It is fitted with an integrated limit contact for cutting off the power supply. The SOR-C mechanical life is 10% of the corresponding circuit-breaker.
The cabled undervoltage release UVR-C ensures circuit-breaker opening for lack/lowering of the release power supply voltage. Opening is guaranteed when the voltage is between 70% and 35% of Un as specified in the Standard. After tripping, the circuit-breaker can be closed again starting from a voltage higher than 85% of Un. With the undervoltage release de-energized, it is impossible to close the circuit-breaker and/or the main contacts. The UVR-C mechanical life is 10% of the corresponding circuit-breaker.
The service releases SOR-C and UVR-C for A0, A1, A2 and A3 which can be mounted as an alternative between each other, are only available in the cabled version (20 AWG cable section/0.5mm2), with free cables 1 m long. For A1 and A2, screw-less snap-on assembly is carried out in the special slot of the circuit-breaker. In the following circuit breakers:
• two-pole (A1, A2), the SOR-C or UVR-C can be mounted as an alternative in the right-hand slot;
• three-pole (A0, A1, A2, A3), the SOR-C or UVR-C can be mounted as an alternative in the lefthand slot;
• four-pole (A1,A2,A3), the SOR-C or UVR-C can be housed as an alternative, in the slot of the third pole.