Ionization in circuit breaker is facilitated by? Mark as favorite Copy Link increasing field strength increase of mean free path high temperature all of the above Check Answer
An efficient and a well designed protective relaying should have? Mark as favorite Copy Link economy and simplicity high speed and selectivity good selectivity and reliability all of the above Check Answer
Relays can be designed to respond to changes in? Mark as favorite Copy Link temperature voltage and current resistance, reactance or impedance all above Check Answer
Overload relays are of …… type? Mark as favorite Copy Link electromagnetic induction solid state all above Check Answer
SF6 gas? Mark as favorite Copy Link is non toxic bas pungent small is lighter than air is yellow in colour Check Answer
Which of the following medium is employed for extinction of arc in air circuit breaker? Mark as favorite Copy Link SF6 Water Oil Air Check Answer
A differential relay responds to? Mark as favorite Copy Link algebraic difference between two electrical quantities algebraic difference between two currents vector difference between two electrical quantities algebraic difference between two voltages Check Answer
The inductive interference between power and communication line can be minimized by? Mark as favorite Copy Link transposition of the communication line transposition of the power line increasing the distance between the conductors both(a) and (b) Check Answer
The use of oil immersed reactors is generally restricted upto? Mark as favorite Copy Link 33 kV 22 kV 11 kV normally no restriction of voltage Check Answer
Which of the following protective devices can be use against lightning surges? Mark as favorite Copy Link surge diverters Lightning arrestors Horn gap Any of the above Check Answer