ABB UNITROL1010 and UNITROL1020 Quick installation guide

ABB UNITROL1010 and UNITROL1020 Quick installation guide

1. Clearly identify the work location and equipment.

2. Disconnect all possible voltage sources. Make sure that reconnection is not possible. Lock out and tag out.

• Open the main disconnecting device of the AVR.

• Disconnect any external power sources from the control circuits before you do work on the control cables.

• If you have a permanent magnet generator connected to the AVR, disconnect it from the AVR with a safety switch or by other means.

• After you disconnect the AVR, always wait for 5 minutes to let the intermediate circuit capacitors discharge before you continue.

• Do not do work on the AVR when the amber warning LED flashes.

3. Protect any other energized parts in the work location against contact.

4. Take special precautions when you are near bare conductors.

5. Measure that the installation is de-energized.

• Use a multimeter with an impedance of at least 1 Mohm.

• Make sure that the voltage between the AVR input power terminals(PWR L1, PWR L2 and PWR L3) and the grounding terminal (PE) is near0 V.

• Make sure that the voltage between the AVR output terminals (IE+, IEand ExCap) and the grounding terminal (PE) is close to 0 V.

6. Install temporary grounding as required by the local regulations.

7. Ask for a permit to work from the person in control of the electrical installation work.