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1SBL351022R8411 ABB UA50-30-11 110 V 50/60 Hz Capacitor-Switching Contactor
ABB UA50-30-11 1SBL351022R8411 is a 3-pole capacitor-switching contactor with a 110 V AC 50 Hz / 110–120 V AC 60 Hz coil, 1 NO + 1 NC auxiliary contacts and a 33 kvar AC-6b rating at 400 V for power-factor correction applications.
£225.78
Why Choose the ABB UA50-30-11 110V 50/60Hz Contactor?
The ABB UA50-30-11, order code 1SBL351022R8411, is a 3-pole capacitor-switching contactor designed specifically for switching capacitor banks in power-factor correction systems. This exact version has a 110 V AC coil at 50 Hz and is also rated for 110–120 V AC at 60 Hz.
The UA50-30-11 features 3 normally open main poles together with 1 NO + 1 NC built-in auxiliary contacts. For capacitor switching it provides an IEC operational power rating of 33 kvar AC-6b at 400 V at ambient temperatures up to 40 °C, with a maximum accepted peak current of 5 kA.
ABB UA contactors are designed for capacitor banks whose inrush-current peaks are less than or equal to 100 times the nominal RMS current. Their block-type construction, AC-operated laminated magnet circuit and compatibility with ABB auxiliary contact accessories make them well suited to automatic power-factor correction panels and other industrial reactive-power compensation systems.
Key Advantages
- Purpose-designed capacitor-switching contactor.
- 110 V AC coil at 50 Hz.
- Also rated for 110–120 V AC at 60 Hz.
- 33 kvar AC-6b operational power rating at 400 V and up to 40 °C.
- Accepts a maximum capacitor-switching peak current of 5 kA.
- Suitable for inrush-current peaks up to 100 times nominal RMS current.
- 3 NO main contacts with 1 NO + 1 NC auxiliary contacts.
- Original ABB block-type construction with a wide range of compatible accessories.
Key Features
- ABB UA50-30-11 capacitor contactor.
- 3-pole configuration.
- 3 NO main contacts.
- 1 NO + 1 NC built-in auxiliary contacts.
- 110 V AC control voltage at 50 Hz.
- 110–120 V AC control voltage at 60 Hz.
- AC-operated laminated magnet circuit.
- Designed for capacitor-bank inrush currents up to 100 × nominal RMS current.
- Maximum residual capacitor voltage before re-energisation: 50 V.
- Electrical durability of 100,000 operating cycles under ABB's specified capacitor-switching conditions.
Dedicated Capacitor-Bank Switching for Power-Factor Correction
Capacitor banks can generate substantial transient inrush currents when energised, placing different demands on a contactor than conventional motor or resistive-load switching. The ABB UA50-30-11 is engineered specifically for capacitor banks whose inrush-current peaks do not exceed 100 times the nominal RMS current, providing dedicated AC-6b switching performance for power-factor correction systems.
ABB specifies that capacitors must be discharged to a maximum residual terminal voltage of 50 V before being re-energised when the contactor closes. Under these specified conditions, the UA50-30-11 offers an electrical durability of 100,000 operating cycles, supporting reliable long-term operation in automatic capacitor-bank installations.
Typical Applications
- Automatic power-factor correction panels.
- Three-phase capacitor-bank switching.
- Industrial reactive-power compensation systems.
- Electrical distribution switchboards.
- Industrial plant power-factor correction.
- Commercial building capacitor-bank systems.
- Power-quality control installations.
- Energy-management and reactive-power control systems.
Technical Specifications
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| Terminal Type | Screw | |
|---|---|---|
| Series | UA | |
| ABB order code | 1SBL351022R8411 | |
| Product type | Capacitor-switching contactor | |
| Number of poles | 3 | |
| Main contacts | 3 NO | |
| Built-in auxiliary contacts | 1 NO + 1 NC | |
| Rated control voltage at 50 Hz | 110 V AC | |
| Rated control voltage at 60 Hz | 110–120 V AC | |
| Control circuit | AC operated | |
| Magnet system | Laminated magnet circuit | |
| IEC operational power at 400 V AC, AC-6b, ≤40 °C | 33 kvar | |
| Maximum accepted peak current | 5 kA | |
| Maximum capacitor-bank inrush peak | ≤100 × nominal RMS current | |
| Maximum residual capacitor voltage before re-energisation | 50 V | |
| Electrical durability | 100,000 operating cycles under specified conditions | |
| Rated insulation voltage | 690 V | |
| Terminal type | Screw terminals | |
| Mounting | DIN rail or mounting plate | |
| Dimensions (W × H × D) | approx. 82 × 110 × 108 mm | |
| Net weight | approx. 1.2 kg | |
| EAN / GTIN | 3471522085849 |
Frequently Asked Questions
What is the ABB UA50-30-11 1SBL351022R8411?
The ABB UA50-30-11 is a 3-pole capacitor-switching contactor with three normally open main contacts, 1 NO + 1 NC auxiliary contacts and an AC-operated laminated magnet circuit.
What coil voltage does the UA50-30-11 1SBL351022R8411 use?
This exact version is rated for 110 V AC at 50 Hz and 110–120 V AC at 60 Hz.
What capacitor-switching rating does the UA50-30-11 provide?
The UA50-30-11 provides an IEC operational power rating of 33 kvar AC-6b at 400 V at ambient temperatures up to 40 °C.
What capacitor-bank inrush current is the UA50-30-11 designed for?
The contactor is designed for capacitor banks whose inrush-current peaks are no more than 100 times the nominal RMS current, with a maximum accepted peak current of 5 kA.
What is the ABB order code for the UA50-30-11 110 V 50/60 Hz contactor?
The ABB order code for this exact UA50-30-11 110 V AC contactor is 1SBL351022R8411.
ABB Capacitor-Switching Contactor Technology
ABB UA contactors are purpose-designed for capacitor-bank switching, combining robust three-pole construction, dedicated AC-6b performance and integrated auxiliary contacts for dependable industrial power-factor correction systems.
