Page 327 - ABB_Motor _Protection_and_Control_catalogue_20221216

ABB MOTOR PROTECTION AND CONTROL 3/251

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UA50..RA … UA75..RA 3-pole contactors for capacitor switching

40 to 60 kvar - Unlimited peak current Î
AC operated

UA..RA contactors for capacitor switching can be used for installations in which the peak current
far exceeds 100 times nominal rms current. The contactors are delivered complete with their 03
damping resistors and must be used without additional inductances.
The capacitors must be discharged (maximum residual voltage at terminals ≤ 50 V) before being
re-energized when the contactors are making.
These contactors are of the block type design with:
1SBC587764F0301 • 3 main poles
• 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
UA75-30-00 RA switching on, whatever its level.
• control circuit: AC operated
• add-on auxiliary contact blocks for side mounting and a wide range of accessories.
IEC UL/CSA Rated control circuit Auxiliary Type Order code Weight
Rated operational Rated operational voltage contacts
power power Uc fitted Pkg
θ ≤ 40 °C θ ≤ 40 °C (1) (1 pce)
400 V 480 V
AC-6b
kvar kvar V 50 Hz V 60 Hz kg
40 50 24 24 0 0 UA50-30-00RA 1SBL351024R8100 1.350
110 110…120 0 0 UA50-30-00RA 1SBL351024R8400 1.350
220…230 230…240 0 0 UA50-30-00RA 1SBL351024R8000 1.350
230…240 240…260 0 0 UA50-30-00RA 1SBL351024R8800 1.350
380…400 400…415 0 0 UA50-30-00RA 1SBL351024R8500 1.350
400…415 415…440 0 0 UA50-30-00RA 1SBL351024R8600 1.350
50 55 24 24 0 0 UA63-30-00RA 1SBL371024R8100 1.350
110 110…120 0 0 UA63-30-00RA 1SBL371024R8400 1.350
220…230 230…240 0 0 UA63-30-00RA 1SBL371024R8000 1.350
230…240 240…260 0 0 UA63-30-00RA 1SBL371024R8800 1.350
380…400 400…415 0 0 UA63-30-00RA 1SBL371024R8500 1.350
400…415 415…440 0 0 UA63-30-00RA 1SBL371024R8600 1.350
60 64 24 24 0 0 UA75-30-00RA 1SBL411024R8100 1.350
110 110…120 0 0 UA75-30-00RA 1SBL411024R8400 1.350
220…230 230…240 0 0 UA75-30-00RA 1SBL411024R8000 1.350
230…240 240…260 0 0 UA75-30-00RA 1SBL411024R8800 1.350
380…400 400…415 0 0 UA75-30-00RA 1SBL411024R8500 1.350
400…415 415…440 0 0 UA75-30-00RA 1SBL411024R8600 1.350
(1) Other control voltages see voltage code table.

140.4 5.53"
35 mm x 15 EN/IEC 60715 10 0.39"
101.5 4"

+10"
110 4.33" 114 4.49" 4 0.16" 47 1.85" +10 150 5.91"
75 mm EN/IEC 60715 6 0.24"

70 2.76"
UA50..RA, UA63..RA, UA75..RA
Main dimensions mm, inches