Importance of Insulation Resistance (IR) The high voltage system consist of generators, cables for power distribution, transformers, switch gear, and consumers. Here, consumers are large electric motors for propulsion, air conditioning compressors, bow thrusters, etc. Insulation resistance is the key parameter which gives the general condition of an electrical equipment. First of all, make sure IR values are to be checked between phases and between phases and earth periodically. In addition, these IR values are recorded for future references. Also, high … Continue reading Insulation Resistance Tests of High Voltage Equipment