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A30..RA 3-pole contactors for capacitor switching, can be used in installations in which the peak current far exceeds 100 times nominal rms current. The contactors are delivered complete with their damping resistors and must be used without additional inductances (see table below). The capacitors must be discharged (maximum residual voltage at terminals ≤ 50 V) before being re-energized when the contactors are making. Their electrical durability is 250 000 operating cycles for Ue < 500 V and 100 000 operating cycles for 500 V ≤ Ue ≤ 690 V. The UA..RA contactors are fitted with a special front mounted block, which ensures the serial insertion of 3 damping resistors into the circuit to limit the current peak on energization of the capacitor bank. Their connection also ensures capacitor precharging in order to limit the second current peak occurring upon making of the main poles. The insertion of resistors allows to damp the highest current peak of the capacitor when switching on, whatever its level. The UA..RA series 3-pole contactors are of the block type design. – Main poles and auxiliary contacts: 3 main poles, 1 built-in auxiliary contact – Control circuit: AC operated with laminated magnet circuit – Accessories: a wide range of accessories is available.

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Category: Contactor, Switch gear
Number of Main Contacts NO3
Max Electrical Switching FrequencyAC-1 600 cycles per hour
Conventional Free-air Thermal Current (Ith)acc. to IEC 60947-4-1, Open Contactors q = 40 °C 125 ampere
Terminal TypeScrew Terminals
Rated Operational VoltageAuxiliary Circuit 690 volt
Operate TimeBetween Coil De-energization and NC Contact Closing 7 14 millisecond
Rated Control Circuit Voltage (Uc)50 Hz 230-240V
Rated Operational Current AC-3 (Ie)(220 / 230 / 240 V) 55 °C 65 ampere
Rated Operational Current AC-1 (Ie)(690 V) 40 °C 115 ampere
Rated Frequency (f)Auxiliary Circuit 50 / 60 hertz
Number of Aux Contacts NO1
Number of Aux Contacts NC0
Rated Short-time Withstand Current (Icw)at 40 °C Ambient Temp, in Free Air, from a Cold State 10 s 650 amp
Product Width54 millimeter
Product Length 141 millimeter
Product Height 130 millimeter
Invoice DescriptionUA30-30-10RA 220-230V 50Hz / 230-240V 60Hz
Package Gross Weight0.46 kilogram
Extended Product TypeUA30-30-10RA
General Use Rating UL/CSA(600 V AC) 90 ampere
Full Load Amps Motor Use(120 V AC) Single Phase 56 ampere

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