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Test and Tagging Three Phase Appliances Part 2


Published on Jan 14, 2015
Part 1 Video – Earth Bond & Insulation Resistance: http://bit.ly/1y053T2
Part 2 Video – Earth Bond & Leakage test

In Part 2 of testing a 3 Phase Appliance, we’ll be showing you how to conduct an Earth Bond and Leakage test.

After conducting a visual inspection, we’ll use our Portable Appliance Tester and Leakage Current Meter to conduct the test. A leakage test is required if the appliance has electronic/magnetic switching (contactor blocks).

1) Plug the IEC lead into the side socket of the Leakage Meter
2) Insert the other end of the IEC lead into the front of the tester
3) Plug the earth return lead into the tester and attach it to an exposed metal part
4) Plug the 3 Phase appliance into the correct socket of the Leakage Meter

We’re now ready to perform an Earth Bond test, with the result needing to be below 1 Ω to pass.

Next we perform our Leakage test:

5) Unplug the PAT tester
6) Connect the mains supply lead of the 3 Phase Leakage Meter and plug it into the 3 Phase GPO
7) Turn the mains power ON and the 3 Phase appliance ON
8) Switch the Meter to the ON position

We can now perform a Leakage test – our Leakage current reading has to be less than 5mA to pass the test. Ensure you wait a few seconds for the number of the reading to level out.

When disconnecting the system, ensure you do it all in reverse by turning the Meter off first, followed by the appliance and mains power

Test and tag three phase appliances Part 1

Part 1 Video – Earth Bond & Insulation Resistance
Part 2 Video – Earth Bond & Leakage test:

In order to Test and Tag a 3 Phase Appliance, there are three tests you can perform: an Earth Bond (essential), Insulation Resistance and Leakage Test.

After conducting a visual inspection, we’ll use our Portable Appliance Tester and adaptor to perform our tests. For this video we’ve used an adaptor that tests all 3 phases as one.

1) Plug the adapter into the PAT Tester
2) Place the 20amp motor into the 20amp socket of the adaptor
3) Place the earth lead from the tester onto an exposed metal part of the 3 Phase appliance
4) Switch the appliance to the ON position

You can now start by choosing a Class I test (majority of 3 Phases are Class I). This will then perform an Earth Bond and Insulation test. Test and tag three phase appliances

– The Earth Bond test requires less than 1 Ω to pass
– The Insulation Resistance test requires a minimum of 1 MΩ

 

Schedule for testing and tagging

Schedule for testing and tagging

Australian Standard AS/NZS3760-2010

AS3760 sets out the recommended schedule for inspecting electrical equipment. Appliances and leads should be checked before use, and checked regularly by a competent  person as prescribed in schedule.

The interval i determined by the environment where the appliance is used and use for which it is being used.

Environment:

Wet dusty or dirty areas require frequent inspection and testing.

Examples cooking laundry and construction will require more frequent testing than offices.

Use

Where appliance is to be unplugged frequently and or dragged around and subject to abuse will require more testing.

Examples commercial cleaning requires more frequent testing than domestic applications.

See Workcover NSW