ABB 1SBL281024R8810 UA30-30-10RA three-pole capacitor switching contactor with 230–240 V AC 50 Hz control voltage, 240–260 V AC 60 Hz control voltage and integrated damping resistors.
£212.83
The ABB 1SBL281024R8810 is a robust three-pole capacitor switching contactor designed for reliable connection and disconnection of capacitor banks in power factor correction systems. As part of the ABB UA30-30-10RA series, it is specifically designed for capacitor switching applications where high current peaks can occur during energisation.
This contactor incorporates built-in damping resistors to limit current peaks when capacitor banks are switched on. The UA..RA design also provides capacitor precharging to help limit the second current peak when the main poles close, supporting dependable operation in industrial power distribution and power factor correction equipment.
With a 230–240 V AC control voltage at 50 Hz and 240–260 V AC at 60 Hz, the ABB 1SBL281024R8810 is suitable for capacitor switching installations requiring a compact three-pole contactor with an integrated normally open auxiliary contact.
Capacitor switching contactors such as the ABB UA30-30-10RA are designed specifically for connecting and disconnecting capacitor banks in power factor correction installations. Their specialised construction helps manage the high inrush currents that can occur when capacitors are energised.
The UA..RA contactors are supplied with integrated damping resistors and a dedicated front-mounted block that provides serial insertion of the resistors during switching. This arrangement helps limit the initial current peak and provides capacitor precharging before the main poles close.
| Manufacturer | ABB |
|---|---|
| Series | UA |
| Model | UA30-30-10RA |
| Product ID | 1SBL281024R8810 |
| Product type | Capacitor switching contactor |
| Number of main contacts | 3 NO |
| Number of auxiliary contacts | 1 NO |
| Number of poles | 3P |
| Control voltage at 50 Hz | 230–240 V AC |
| Control voltage at 60 Hz | 240–260 V AC |
| Rated operational voltage | 690 V AC |
| Rated frequency | 50 / 60 Hz |
| Conventional free-air thermal current | 16 A |
| Rated capacitor switching power at 400/415 V | 30 kvar at 40 °C |
| Rated capacitor switching power at 440 V | 32 kvar at 40 °C |
| Rated capacitor switching power at 500/550 V | 34 kvar at 40 °C |
| Rated capacitor switching power at 690 V | 45 kvar at 40 °C |
| Auxiliary circuit AC-15 current at 220/240 V | 4 A |
| Standards | IEC/EN 60947-1, IEC/EN 60947-4-1 |
| Mounting type | DIN rail mounting |
| Terminal type | Screw terminals |
| Dimensions (W × H × D) | 54 × 130 × 141 mm |
| Net weight | 0.81 kg |
The ABB 1SBL281024R8810 is a three-pole capacitor switching contactor designed for switching capacitor banks in power factor correction installations.
The contactor operates with a 230–240 V AC control voltage at 50 Hz and 240–260 V AC at 60 Hz.
The UA30-30-10RA has three normally open main contacts and one built-in normally open auxiliary contact.
At 40 °C, the contactor is rated for 30 kvar at 400/415 V, with ratings of 32 kvar at 440 V, 34 kvar at 500/550 V and 45 kvar at 690 V.
Yes, the UA30-30-10RA is supplied with built-in damping resistors designed to limit current peaks during capacitor energisation.
ABB UA30-30-10RA capacitor switching contactors provide dedicated switching performance for power factor correction systems, combining three-pole operation with integrated damping resistors and a built-in auxiliary contact.
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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...