Why Tan delta testing is done? Tan delta test is conducted for transformer oil (read here) and also for electrical equipment like C.T, P.T, Transformers ,cables etc. Purpose of this test is to determine the condition of insulation. Insulating materials (oil and paper insulation on winding) may deteriorate due to moisture ingress, aging, mechanical stress … Read more
What is a Potential transformer and capacitive voltage transformer, Is there a difference between the two? Potential transformer– Potential transformer is used for measurement as well as protection purpose of equipment in a substation. It’s purpose is to step down High Voltage to low voltage so that it can be easily read by measuring instruments, … Read more
What is a current transformer and How does a current transformer work? A current transformer (CT) is a device to measure electric current. The purpose of a current transformer is to transform high currents into lower, more manageable levels that can be easily measured and monitored through measuring instruments. It consists of a primary winding, … Read more