How To Test And Tag 3 Phase Appliances And Leads
Three phase appliances are similar to single phase appliances except they use three actives instead of just one. This provides increased amount of power available to run the appliance, provide greater toque and deliver smoother operation of motors etc.
Three phase appliances come under the same scope for testing and tagging as single phase appliances and must be considered as part of any workplace test and tagging program.
The process to test and tag them is very similar to how it is done with single phase appliances. The most common mistake made is the method used to test the insulation of the appliance. Performing the standard (500V DC) insulation resistance test is only suitable in a limited number of applications because the world of three phase appliances is full of electromechanical switches, soft starts and variable speed drives and more. These design features mean alternative testing methods must be used to achieve compliance with AS/NZS 3760.
Added to this there are 4 & 5 pin plugs as well as different keylocks for the plugs and sockets.
Due to the higher voltage (415V) used, extra safety precautions must be implemented.
TATSA will be releasing a three phase test and tag course very soon that covers the theory of three phase power, correct inspection and testing processes and safety precautions that must be considered.
Register your expression of interest in this course and get alerted to pre-release special offer,