UA75..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: 3 main poles – Control circuit: AC operated with laminated magnet circuit – Accessories: a wide range of accessories is available.
Categories
Products » Low Voltage Products and Systems » Control Products » Contactors » Block Contactors » UA and UA..RA Contactors
Technical
Number of Main Contacts NO:
3
Number of Main Contacts NC:
0
Number of Auxiliary Contacts NO:
0
Number of Auxiliary Contacts NC:
0
Rated Operational Voltage:
Main Circuit 690 V
Rated Operational Power AC-6b (Pe):
(230 / 240 V) 40 °C, 50 / 60 Hz 35 kvar
(230 / 240 V) 55 °C, 50 / 60 Hz 30 kvar
(230 / 240 V) 70 °C, 50 / 60 Hz 25 kvar
(400 / 415 V) 40 °C, 50 / 60 Hz 60 kvar
(400 / 415 V) 70 °C, 50 / 60 Hz 41 kvar
(400 / 415 V) 55 °C, 50 / 60 Hz 50 kvar
(440 V) 40 °C, 50 / 60 Hz 65 kvar
(440 V) 55 °C, 50 / 60 Hz 53 kvar
(440 V) 70 °C, 50 / 60 Hz 45 kvar
(500 / 550 V), 40 °C, 50 / 60 Hz 75 kvar
(500 / 550 V) 55 °C, 50 / 60 Hz 65 kvar
(500 / 550 V) 70 °C, 50 / 60 Hz 55 kvar
(690 V) 40 °C, 50 / 60 Hz 100 kvar
(690 V) 55 °C, 50 / 60 Hz 80 kvar
(690 V) 70 °C, 50 / 60 Hz 70 kvar
Short-Circuit Protective Devices:
gG Type Fuses 200 A
Maximum Breaking Capacity:
cos phi=0.45 (cos phi=0.35 for Ie > 100 A) at 440 V 1300 A
cos phi=0.45 (cos phi=0.35 for Ie > 100 A) at 690 V 630 A
Maximum Electrical Switching Frequency:
240 cycles per hour
Rated Insulation Voltage (Ui):
acc. to IEC 60947-4-1 and VDE 0110 (Gr. C) 1000 V
acc. to UL/CSA 600 V
Rated Impulse Withstand Voltage (Uimp):
8 kV
Rated Control Circuit Voltage (Uc):
50 Hz 220 … 230 V
60 Hz 230 … 240 V
Coil Consumption:
Average Holding Value 50 / 60 Hz 18 5.5 V·A
Average Holding Value 50 Hz 18 5.5 V·A
Average Holding Value 60 Hz 18 5.5 V·A
Average Pull-in Value 50 Hz 180 V·A
Average Pull-in Value 60 Hz 210 V·A
Operate Time:
Between Coil De-energization and NO Contact Opening 4 … 11 ms
Between Coil Energization and NO Contact Closing 8 … 27 ms
Connecting Capacity Main Circuit:
Flexible with Cable End 6 … 10 mm²
Rigid Cable 6 … 16 mm²
Connecting Capacity Auxiliary Circuit:
Flexible with Cable End 0.75 … 2.5 mm²
Rigid Cable 1 … 4 mm²
Degree of Protection:
acc. to IEC 60529, IEC 60947-1, EN 60529 Coil Terminals IP20
Connecting Terminals (delivered in open position) Main Poles:
M 6 (+,-) pozidriv 2 screws with 1x (13 x 10 mm) connector
Terminal Type:
Screw Terminals
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