Installation automation for the current measuring transformers calibration

As the energy market develops and the cost of electrical energy continue to rise, more emphasis is being placed on the accuracy of current measuring transformers. As such, a current measuring transformer calibration system was developed at the Ural Research Institute of Metrology. The calibration system consists of an adjustable current source used as the current source of a 50 Hz commercial frequency for specifying current in primary circuits of verifiable and standard transformers, laboratory autotransformers and feed transformer, a comparison device and standard two-stage current transformer used as the measuring standard device.