NECA Technical has received a number of calls asking about equipment complying to Standard IEC 61000.3.6 which pertains to harmonic distortion in the distribution system that is caused by connected loads.
The authority asks for this as loads that generate harmonics can cause the network voltage to become unstable and distribution transformers to operate at elevated temperatures.
To be able to see harmonics, there is a need for
Harmonics can create hot neutral wires with elevated currents which can also create loose connections.
One method an electrician can use to possibly see harmonic issues is to take temperature measurements of the actives and associated neutral wire, and if the neutral wire is hotter than the actives, this could show issues with the installation that would require further investigation as to the cause.
There is the need for manufacturers to design a product that does not produce harmonics. If as electrical contractors, we install quality approved equipment acquired from reputable wholesalers, there should be no problems as compliant equipment will have been built to standards.For further information about harmonics please email NECA Technical at firstname.lastname@example.org or call the NECA TECH Hotline on 1300 6322 8324.