ABB AMVAC Installation And Operation Manual

Also see for AMVAC: Manual Technical guide Technical guide Technical guide

ABB AMVAC Installation And Operation Manual Manual pdf 22 page image

22 1VAL050601-MB Rev CCONTROL W IRING:The control wiring requires visual inspection of hardware during routine maintenance. Disconnect control power beforeverifying secondary hardware and before low-frequency withstand voltage testing.Remove the front cover with a screwdriver. Correct any loose or missing mounting hardware. Verify the ground wireconnection to the frame and all connectors' alignment and snugness on the electrical components. Visually inspect thesecondary plug and correct any pins that may have become displaced.To verify the integrity of the secondary insulation, perform the following low-frequency withstand voltage test:1. Connect all pins from the secondary to a test wire2. Connect test wire to the high potential lead of the test machine3. Ground the breaker frame4. Start machine with output potential at 0 (zero) VAC RMS.5. Increase the potential to the required insulation test voltage (1125VAC RMS)6. Hold for one minute7. Reduce potential to 0 (zero) VAC and turn off machineA successful withstand indicates satisfactory insulation strength of the secondary circuit. Failing insulation will notsustain the voltage across the secondary. Replace the breaker control wiring if the insulation fails during low-frequencywithstand voltage testing.Replace the front cover before operation. Verify the operation with 2-5 electrical operations in the Test position or with aremote power supply.PRIMARY CIRCUIT ASSEMBLY : (Pole)To verify the integrity of the vacuum interrupters, perform the following low-frequency withstand voltage test:1. Open the breaker (no control power supplied to breaker).a. Connect the high potential lead to one terminal.b. Ground the remaining 5 terminals and breaker frame.2. Start machine with output potential at 0 (zero) VAC.3. Increase the potential to the required voltage (see Table 3 on previous page).4. Hold for one minute.Provided by Northeast Power Systems, Inc. (NEPSI)