Protective relays are devices that detect abnormal conditions in electrical circuits by measuring constantly the electrical quantities which differ during normal and abnormal conditions.
Answer : To protect most of the electrical equipment handling low power, the types of relays used are thermocouple, electronic and bimetallic.
Description : The operating point of a protective current transformer is near the
Answer : The operating point of a protective current transformer is near the Ankle point
Answer : Burden of a protective relay is the power absorbed by the circuit of relay.
Answer : An efficient and a well designed protective relaying should have good selectivity and reliability, economy and simplicity, high speed and selectivity.
Answer : Discrimination between main and back up protection is provided by the use of relays which are slow.