Why this FAQ?
These FAQs focus on practical details—application, ratings, installation, compliance, and sourcing—helping engineers and buyers assess suitability for capacitor bank switching.
What is the ABB UA26-30-10RA capacitor switching contactor used for?
The ABB UA26-30-10RA is a 3-pole capacitor switching contactor designed for applications where inrush currents can exceed 100 times the nominal RMS current. It comes with pre-mounted damping resistors to limit current peaks during capacitor bank energization. Typical use is in power factor correction panels and capacitor switching circuits.
What is the rated control voltage of the UA26-30-10RA?
The coil is rated for 220–230 V AC at 50 Hz and 230–240 V AC at 60 Hz. Average pull-in power is 120 V·A (50 Hz) / 140 V·A (60 Hz), while holding power is about 12 V·A.
What are the capacitor switching capacities at different voltages?
At 230/240 V and 40 °C, the unit switches up to 12.5 kvar; at 400/415 V and 40 °C, up to 22 kvar; at 440 V, up to 24 kvar; and at 500/550 V, up to 30 kvar. Capacitor rating reduces with higher ambient temperatures (e.g., 70 °C: 9 kvar at 230 V, 15.5 kvar at 400 V).
What standards and certifications does this contactor meet?
The UA26-30-10RA complies with IEC/EN 60947-1 and IEC/EN 60947-4-1 standards. Rated insulation voltage is 1000 V, impulse withstand voltage is 8 kV, and degree of protection for terminals is IP20. UL/CSA compliance is also noted with 600 V Ui.
What is the electrical durability of the UA26-30-10RA?
The electrical durability is 250,000 operations for Ue ≤ 440 V and 100,000 operations for 500–690 V. The maximum electrical switching frequency is 240 operations per hour.
How should this contactor be installed?
It can be mounted on DIN rail (TH35-15 / TH35-7.5 per IEC 60715) or with two M4 screws. Terminals are screw-type with cable clamps, IP20 protected, and supplied in open position for easier wiring. Capacitors must be fully discharged (≤50 V residual) before re-energizing.
What are the physical dimensions and weight?
The UA26-30-10RA measures 54 mm wide, 126.3 mm deep, and 120 mm high, with a net weight of 0.71 kg. This compact block-type design is suitable for panel mounting.
Where can I source the ABB UA26-30-10RA in India?
Shansen Enterprises is an authorized ABB channel partner offering the UA26-30-10RA with pan-India delivery. Quick quotes and ordering are available via WhatsApp support.
