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1SBL411024R8100 ABB UA75-30-00RA 3 Pole Contactor 24V 50/60Hz Capacitor Switching Contactor
ABB UA75-30-00RA three-pole capacitor switching contactor with 24 V AC coil, integrated damping resistors and 690 V AC rated operational voltage for industrial capacitor bank control applications.
£383.62
Why Choose the ABB UA75-30-00RA Capacitor Switching Contactor?
The ABB UA75-30-00RA (1SBL411024R8100) is a specialised three-pole capacitor switching contactor designed for reliable control of capacitor banks in industrial power factor correction systems. As part of the ABB UA..RA contactor range, it is engineered for applications where capacitor energisation creates high inrush currents, providing dependable switching performance in demanding electrical installations.
This contactor includes an integrated front-mounted damping resistor block that inserts three damping resistors into the circuit to limit current peaks during capacitor bank energisation. The design also provides capacitor precharging to reduce secondary current peaks when the main contacts close, allowing operation without additional inductances.
With a 24 V AC 50/60 Hz control coil, a 690 V AC rated operational voltage and a three-pole configuration, the ABB UA75-30-00RA is suitable for industrial capacitor switching and power factor correction applications requiring controlled energisation.
Key Advantages
- Purpose-built capacitor switching contactor for industrial power factor correction systems.
- Three-pole contactor design for reliable capacitor bank switching.
- Integrated damping resistors reduce capacitor energisation current peaks.
- 24 V AC 50/60 Hz control voltage for industrial control applications.
- Designed for capacitor banks where peak current can far exceed nominal RMS current.
- Reliable ABB construction for demanding electrical installations.
Key Features
- ABB UA..RA capacitor switching contactor series.
- UA75-30-00RA model.
- Three main poles.
- 24 V 50/60 Hz AC control circuit.
- 690 V AC rated operational voltage.
- Integrated front-mounted damping resistor block.
- AC-operated laminated magnet control circuit.
- Block contactor construction with ABB accessory compatibility.
Reliable Capacitor Switching for Industrial Power Systems
Capacitor switching contactors are designed specifically for controlling capacitor banks used in power factor correction systems. By managing high transient currents during energisation, specialised contactors such as the ABB UA75-30-00RA help improve switching reliability and protect electrical components.
The ABB UA..RA series combines robust mechanical construction with integrated damping technology, making it suitable for industrial electrical installations where capacitor switching reliability and long service life are required.
Typical Applications
- Industrial power factor correction systems.
- Automatic capacitor bank control panels.
- Electrical distribution systems.
- Industrial energy management installations.
- Switchboards and control cabinets.
- Power quality improvement equipment.
Technical Specifications
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| Poles | 3-pole | |
|---|---|---|
| Coil Voltage Range | 24 V | |
| Device Type | Capacitor Switching Contactor | |
| Coil / Supply Voltage | 24 V AC | |
| Auxiliary Contacts | None | |
| Coil Type | AC | |
| Manufacturer | ABB | |
| Series | UA..RA Capacitor Switching Contactors | |
| Model | UA75-30-00RA | |
| Product type | Capacitor switching contactor | |
| Product ID | 1SBL411024R8100 | |
| Main contacts | 3 NO | |
| Main poles | 3P | |
| Auxiliary contacts | 0 NO + 0 NC | |
| Control voltage | 24 V AC 50/60 Hz | |
| Rated operational voltage | 690 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Protection rating | IP20 coil terminals / IP10 main terminals | |
| Mounting type | DIN rail or screw mounting | |
| Dimensions (H × W × D) | 150 × 70 × 140.4 mm | |
| Weight | approx. 1.35 kg |
Frequently Asked Questions
What is the ABB UA75-30-00RA used for?
This contactor is designed for switching capacitor banks in industrial power factor correction systems.
What control voltage does the UA75-30-00RA require?
The UA75-30-00RA uses a 24 V AC 50/60 Hz control circuit.
How many poles does this contactor have?
The ABB UA75-30-00RA is a three-pole contactor with three main normally open contacts.
Why does this contactor include damping resistors?
The integrated damping resistors limit capacitor energisation current peaks and provide capacitor precharging during switching operations.
What voltage rating does the main circuit support?
The UA75-30-00RA supports a rated operational voltage of up to 690 V AC.
Trusted by Industrial Electrical Engineers Worldwide
ABB UA..RA capacitor switching contactors are widely used in industrial power correction systems to provide reliable capacitor bank control, reduced switching stress and dependable electrical performance.
