Three phase appliances are simply appliances that use three actives, in order to increase the amount of power available, without
having to increase the cable size, as the current is divided into three across each phase.
The combination of these 3 phases of voltages outputs approx. 400 volt AC.
For many single earthed appliances, an earth continuity and insulation test is sufficient to test the electrical integrity of
the appliance. However, the Australian standard specifies that for appliances that must be energised to be in the 'on' position a
current leakage test shall be performed.
For that reason, many single and 3-Phase appliances require a current leakage test.
As per single phase testing, 3-Phase appliances should be tested the same way but with extra considerations. There are a numerous
amperage rated plugs and sockets with either 4 or 5 pin combinations, further complicated by different shapes, keyways and current
ratings and consideration must be taken for machinery with soft starts, variable speed drives and electromechanical devices - all of
these which can not solely rely on IR (insulation resistance)
testing alone, hence the need to energise the appliance to perform a current leakage test.
All staff at Stay Safe Test and Tag Services have undergone the necessary training and are qualified to perform Test and Tag
procedures to all types of 3 phase appliances and applications.