The over-voltage surges in power systems maybe caused by? Mark as favorite Copy Link lightning switching resonance Any of the above Check Answer
By which of the following methods major portion of the beat generated in a H.R.C. fuse is dissipated? Mark as favorite Copy Link Conduction Radiation Convection All of the above Check Answer
The relay operating speed depends upon? Mark as favorite Copy Link armature core air gap the spring tension the rate of flux built up all of the above Check Answer
Air blast circuit breaker is used for? Mark as favorite Copy Link intermidant duty short duty repeated duty over currents Check Answer
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