Current Transformers

Industrial Current Transformers have very high transformation ratios. The primary winding is generally a single turn winding formed by the power line bus-bar passing through the toroid hole. The energy potential developed across the transformer terminals is proportional to the current passing through the bus-bar, thus helping in measurement of the same. These Transformers can also be used in controlling the amount of current permissible in any circuit, by causing switches to trip when the current exceeds any preset value.