ABB UA26-30-10RA-88 1SBL241024R8810 is a 3-pole capacitor switching contactor with three damping resistors, 3 NO main contacts, 1 NO auxiliary contact, a 22 kVAr AC-6b rating at 400 V and a 230–240 V 50 Hz / 240–260 V 60 Hz AC coil.
£167.15
The ABB UA26-30-10RA-88, product ID 1SBL241024R8810, is a 3-pole capacitor switching contactor with damping resistors designed for controlling capacitor banks in industrial power factor correction systems. As part of the ABB UA..RA contactor range, it is specifically developed for installations where capacitor energisation can produce peak currents far exceeding 100 times the nominal RMS current.
The UA26-30-10RA-88 features three normally open main contacts and one normally open auxiliary contact. Under AC-6b duty, it is rated for capacitor banks up to 22 kvar at 400 V. A special front-mounted block serially inserts three damping resistors into the circuit during energisation, helping limit the initial current peak and pre-charge the capacitors before the main poles close.
Its AC-operated control circuit uses a 230–240 V AC coil at 50 Hz or 240–260 V AC at 60 Hz. Screw-terminal connections provide secure wiring, while the compact 120 × 54 × 126.3 mm construction makes the UA26-30-10RA-88 suitable for integration into automatic power factor correction panels and industrial capacitor switching assemblies.
Energising capacitor banks can generate extremely high transient currents that place considerable electrical and mechanical stress on switching equipment. The ABB UA26-30-10RA-88 incorporates a special front-mounted block that serially inserts three damping resistors into the circuit to limit the initial current peak when the capacitor bank is energised.
The resistor circuit also pre-charges the capacitors before the main poles close, helping limit the subsequent current peak. This dedicated design allows the UA26-30-10RA-88 to be used in installations where peak current can far exceed 100 times the nominal RMS current, making it well suited to automatic power factor correction and reactive power compensation systems.
| Manufacturer | ABB |
|---|---|
| Series | UA..RA |
| Model | UA26-30-10RA-88 |
| Product ID | 1SBL241024R8810 |
| Product type | 3-pole capacitor switching contactor with damping resistors |
| Number of main poles | 3 |
| Main contacts | 3 NO |
| Auxiliary contacts | 1 NO |
| Control voltage at 50 Hz | 230–240 V AC |
| Control voltage at 60 Hz | 240–260 V AC |
| AC-6b rated operational power | 22 kvar at 400 V |
| Rated operational voltage | 690 V AC |
| Inrush current limitation | 3 damping resistors |
| Maximum residual capacitor voltage before re-energisation | 50 V |
| Electrical durability below 500 V | 250,000 operating cycles |
| Electrical durability at 500–690 V | 100,000 operating cycles |
| Protection rating | IP20 at coil terminals |
| Terminal type | Screw terminals |
| Operating ambient temperature at rated control voltage | -40 to +70 °C |
| Storage temperature | -60 to +80 °C |
| Rated impulse withstand voltage | 8 kV |
| Dimensions (H × W × D) | 120 × 54 × 126.3 mm |
| Net weight | 0.710 kg |
The ABB UA26-30-10RA-88 is a 3-pole contactor designed for switching capacitor banks in industrial power factor correction and reactive power compensation systems.
The UA26-30-10RA-88 has an AC-6b rated operational power of 22 kvar at 400 V.
The contactor uses a 230–240 V AC coil at 50 Hz or 240–260 V AC at 60 Hz.
The three damping resistors help limit the high inrush current generated when a capacitor bank is energised and pre-charge the capacitors before the main poles close.
The UA26-30-10RA-88 has three normally open main contacts and one normally open auxiliary contact.
ABB UA..RA contactors combine dedicated capacitor switching technology with damping resistors to limit high energisation currents, providing dependable control for industrial power factor correction and reactive power compensation systems.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...