ABB UA16-30-10RA 24V 50Hz / 24V 60Hz Contactor – 1SBL181024R8110
- Product Name : Contactor
- Auxiliary Contacts : 1 NO
- Poles : 3
- Product Class : Block Contactors
- Voltage : 24 V DC
- Terminal Type : Screw Terminals
The UA16..RA 3-pole contactors are specifically designed for capacitor switching in applications where peak currents can exceed 100 times the nominal RMS current. Supplied complete with integrated damping resistors, these contactors must be used without any additional inductive components. To ensure safe operation, capacitors must be fully discharged—having a maximum residual voltage of 50 V—before re-energization. The contactors are highly durable, offering up to 250,000 electrical operating cycles for voltages below 500 V and 100,000 cycles for voltages between 500 V and 690 V. Each unit is equipped with a special front-mounted block that ensures the serial insertion of three damping resistors into the circuit. This design limits the initial inrush current during capacitor bank energization and enables capacitor precharging to reduce the second current peak when the main poles close. The resistor insertion effectively dampens even the highest switching current peaks. The UA..RA series follows a block-type design and features three main poles, one built-in auxiliary contact, an AC-operated control circuit with a laminated magnet core, and compatibility with a wide range of accessories.
