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1SFL431024R8611 ABB UA95-30-11RA 400–415 V 50 Hz Contactor
ABB UA95-30-11RA is a three-pole capacitor-switching contactor with 3 NO main contacts, 1 NO + 1 NC auxiliary contacts and a 400–415 V AC 50 Hz coil for industrial power-factor correction systems.
£445.54
Why Choose the ABB UA95-30-11RA Contactor?
The ABB UA95-30-11RA is a robust three-pole capacitor-switching contactor designed for reliable control of capacitor banks in industrial power-factor correction systems. Part of the ABB UA...RA contactor range, this version carries ABB order code 1SFL431024R8611 and is supplied with a 400–415 V AC 50 Hz coil.
The UA...RA range is engineered for demanding capacitor-switching applications where very high transient currents can occur during energisation. The UA95-30-11RA is designed to withstand peak currents up to 100 times the nominal RMS current, making it suitable for capacitor banks requiring enhanced inrush-current capability.
The contactor incorporates three normally open main contacts together with 1 NO + 1 NC auxiliary contacts. Its combination of high-current switching capability, application-specific capacitor duty and integrated auxiliary contacts makes it well suited to automatic power-factor correction panels and industrial reactive-power compensation equipment.
Key Advantages
- Purpose-designed three-pole contactor for capacitor-bank switching.
- UA...RA design for demanding capacitor inrush-current conditions.
- Handles peak currents up to 100 times the nominal RMS current.
- 400–415 V AC 50 Hz coil for industrial control systems.
- 3 NO main contacts for three-phase capacitor switching.
- Integrated 1 NO + 1 NC auxiliary contacts for signalling and control.
- Suitable for automatic power-factor correction and reactive-power compensation systems.
Key Features
- ABB UA95-30-11RA capacitor-switching contactor.
- 3-pole, 3 NO main-contact configuration.
- 1 NO + 1 NC auxiliary-contact configuration.
- 400–415 V AC control voltage at 50 Hz.
- 415–440 V AC control voltage at 60 Hz.
- 145 A conventional free-air thermal current at 40 °C.
- 96 A AC-3 operational current at 380/400 V at 55 °C.
- 45 kW AC-3 operational power at 380/400 V.
- 1000 V rated operational voltage for the main circuit.
- 8 kV rated impulse withstand voltage.
Reliable Capacitor Switching for Power-Factor Correction
Capacitor banks can produce extremely high transient currents when connected to an energised electrical system. The ABB UA95-30-11RA is specifically engineered for these demanding switching conditions, providing the high peak-current capability required for dependable capacitor-bank operation.
Its three main poles switch the three-phase capacitor circuit, while the integrated 1 NO + 1 NC auxiliary contacts can be incorporated into control, indication and interlocking circuits. This makes the UA95-30-11RA particularly suitable for automatic power-factor correction panels where capacitor stages are repeatedly connected and disconnected according to reactive-power demand.
Typical Applications
- Automatic power-factor correction panels.
- Three-phase capacitor-bank switching.
- Reactive-power compensation systems.
- Industrial electrical distribution equipment.
- Capacitor switching with high transient inrush currents.
- Commercial and industrial power-factor correction installations.
- OEM electrical control and compensation systems.
Technical Specifications
| Series | UA...RA Contactors |
|---|---|
| ABB order code | 1SFL431024R8611 |
| Product type | Capacitor-switching contactor |
| Number of poles | 3 |
| Main contacts | 3 NO |
| Auxiliary contacts | 1 NO + 1 NC |
| Control voltage at 50 Hz | 400–415 V AC |
| Control voltage at 60 Hz | 415–440 V AC |
| Conventional free-air thermal current (Ith) | 145 A at 40 °C |
| AC-3 operational current at 380/400 V | 96 A at 55 °C |
| AC-3 operational power at 380/400 V | 45 kW |
| Rated operational voltage, main circuit | 1000 V |
| Rated insulation voltage (Ui) | 1000 V |
| Rated impulse withstand voltage (Uimp) | 8 kV |
| Maximum capacitor peak-current capability | 100 × nominal RMS current |
| Maximum electrical switching frequency | 240 cycles/hour |
| Net width | 102 mm |
| Net height | 170 mm |
| Net depth | 155.6 mm |
| Net weight | approx. 1.8 kg |
Frequently Asked Questions
What is the ABB UA95-30-11RA used for?
The UA95-30-11RA is a three-pole contactor designed for capacitor-bank switching, particularly in industrial power-factor correction and reactive-power compensation systems.
What coil voltage does ABB order code 1SFL431024R8611 use?
This exact UA95-30-11RA version uses a 400–415 V AC control voltage at 50 Hz.
What auxiliary contacts are fitted to the UA95-30-11RA?
The contactor incorporates 1 normally open and 1 normally closed auxiliary contact in addition to its three normally open main poles.
How does the UA95-30-11RA handle capacitor inrush current?
The UA...RA design is intended for demanding capacitor-switching duty and can accommodate peak currents up to 100 times the nominal RMS current.
What is the thermal current rating of the UA95-30-11RA?
The contactor has a conventional free-air thermal current rating of 145 A at 40 °C.
Reliable ABB Switching for Capacitor Banks
ABB UA...RA contactors are engineered for demanding capacitor-switching applications, combining high peak-current capability with robust three-phase switching and auxiliary control contacts for industrial power-factor correction systems.
