Understanding Compatibility Levels

This application note discusses the compatibility, with respect to harmonic voltage levels, of load devices with the electricity supply system. Consumers' equipment operating on the network causes disturbances which affect the proper operation of other equipment on the network.

To ensure compatibility it is necessary both to control the maximum level of disturbance that may be present at any point on the network and to establish a level of disturbance to which every item of equipment will be immune.

Equipment standards and network guidance are designed to ensure that the emission levels of equipment are such that connection to the network will not raise the overall level of disturbance and that equipment will not be susceptible to the levels of disturbance that can be expected on the network.


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