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1SBL351022R8511 ABB UA50-30-11 380-400V 50Hz Capacitor Contactor
ABB UA50-30-11 1SBL351022R8511 three-pole capacitor switching contactor with a 380–400 V AC 50 Hz control coil, 1 NO + 1 NC auxiliary contacts and a 33 kvar IEC capacitor switching rating at 400 V.
£225.78
Why Choose the ABB UA50-30-11 380-400V 50Hz Contactor?
The ABB UA50-30-11, order code 1SBL351022R8511, is a robust three-pole capacitor switching contactor designed for switching three-phase capacitor banks in industrial power factor correction systems. As part of the ABB UA contactor series, it is engineered specifically for the high inrush-current conditions associated with capacitor energisation.
The UA50-30-11 features three normally open main poles together with 1 NO + 1 NC auxiliary contacts. ABB specifies UA contactors for capacitor banks with inrush-current peaks up to 100 times the nominal RMS current, making the range suitable for demanding power factor correction installations when the capacitors are correctly discharged before re-energisation.
This exact 1SBL351022R8511 version has a 380–400 V AC, 50 Hz control coil and is also rated for 400–415 V AC at 60 Hz. At 400 V, the UA50 is rated for capacitor switching duties up to 33 kvar according to IEC, providing a purpose-designed solution for industrial reactive power compensation.
Key Advantages
- Purpose-designed three-phase capacitor switching contactor.
- 380–400 V AC, 50 Hz control coil.
- Also rated for 400–415 V AC at 60 Hz.
- Three normally open main poles for three-phase capacitor switching.
- Integrated 1 NO + 1 NC auxiliary contacts for control and signalling.
- 33 kvar capacitor switching rating at 400 V according to IEC.
- Designed for capacitor-bank inrush-current peaks up to 100 times nominal RMS current.
Key Features
- ABB UA50-30-11 capacitor contactor.
- 3-pole block-type contactor design.
- 3 NO main contacts.
- 1 NO + 1 NC fitted auxiliary contacts.
- 380–400 V AC at 50 Hz rated control circuit voltage.
- 400–415 V AC at 60 Hz rated control circuit voltage.
- 33 kvar at 400 V AC-6b IEC capacitor switching rating.
- AC-operated control circuit.
- Supports additional front- or side-mounted auxiliary contact blocks.
- Designed specifically for industrial capacitor bank switching.
Reliable Capacitor Bank Switching
Capacitor banks can produce substantial transient currents when energised, placing significantly different demands on switching equipment compared with conventional motor or resistive loads. The ABB UA50-30-11 is specifically engineered for capacitor switching and can be used where inrush-current peaks are no greater than 100 times the capacitor bank's nominal RMS current.
For correct operation, capacitor banks must be sufficiently discharged before being re-energised. The UA50-30-11 combines dedicated capacitor-switching capability with three main poles and integrated auxiliary contacts, making it particularly suitable for automatic power factor correction panels and industrial reactive power compensation systems.
Typical Applications
- Automatic power factor correction panels.
- Three-phase capacitor bank switching.
- Industrial reactive power compensation systems.
- Electrical distribution and switchgear panels.
- Manufacturing plant power factor correction.
- Industrial electrical control systems.
Technical Specifications
| Series | UA50 |
|---|---|
| ABB order code | 1SBL351022R8511 |
| Product group | 311503-Contactors A Small (Frctl) |
| Product type | Capacitor switching contactor |
| Number of main poles | 3 |
| Main contact configuration | 3 NO |
| Fitted auxiliary contacts | 1 NO + 1 NC |
| Rated control voltage at 50 Hz | 380–400 V AC |
| Rated control voltage at 60 Hz | 400–415 V AC |
| Control circuit | AC operated |
| Utilisation category | AC-6b |
| Rated capacitor switching power at 400 V | 33 kvar |
| Maximum capacitor-bank inrush peak | ≤100 × nominal RMS current |
| Weight | approx. 1.2 kg |
| EAN | 3471522085856 |
Frequently Asked Questions
What is the ABB UA50-30-11 used for?
The ABB UA50-30-11 is a three-pole capacitor switching contactor designed primarily for switching capacitor banks in industrial power factor correction systems.
What control voltage does the UA50-30-11 1SBL351022R8511 require?
This exact version is rated for 380–400 V AC at 50 Hz and 400–415 V AC at 60 Hz.
What capacitor switching capacity does the UA50-30-11 provide?
The UA50-30-11 has an IEC capacitor switching rating of 33 kvar at 400 V for AC-6b duty.
Does the UA50-30-11 include auxiliary contacts?
Yes. The contactor is supplied with 1 normally open and 1 normally closed auxiliary contact for control and signalling functions.
What inrush current can the ABB UA50 handle?
The UA contactor range is designed for capacitor banks where the inrush-current peak is no greater than 100 times the nominal RMS current, with the capacitors correctly discharged before re-energisation.
Trusted Industrial Switching from ABB
ABB UA capacitor contactors are purpose-designed for industrial power factor correction systems, providing reliable three-phase capacitor switching and robust performance under the demanding transient conditions associated with capacitor bank operation.
