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What is the difference between relay and fuse?
A relay is a switch; it is not usually meant to open under fault conditions (high current), and would likely fail if done so. A fuse is a fault protection device. If a short circuit develops, large currents will flow, and the fuse link will melt, causing the circuit to open. There are also protective relays, which are devices that sense fault, or other undesireable conditions, and are used to send trip commands to breakers.
What is the difference between an air break switch and an isolator?
An air-break link (ABL) switch is designed to interrupt normal load currents (but not fault currents). In order to do so, they usually incorporate some form of very simple arc-extinguishing feature.An isolator switch, on the other hand, is not designed to interrupt current, but to isolate equipment after that equipment has been disconnected (e.g. by opening a circuit breaker).
Suppose an electric motor with a controller is not working. What is the sequence of testing you will do in your troubleshooting?
1st check the power supply switch whether on or off then Check the all wiring connections may be wire disconnected or there is any loose connection(OFF the switch). smell the component whether it is heated or not and touch to experiance the heat(OFF the switch). replace the controller/motor with new one to detect fault present in which part.
What is the antonym for fault?
A fault is a flaw or a disadvantage. An antonym for fault would be virtue, advantage, asset, merit, or strength.
What are symmetrical and unsymmetrical faults?
the fault in electrical transmission line which give rise to symmetrical fault current is called symmetric fault. e.g; L-L-L-G fault. the fault in transmission line which give rise to unsymmetrical fault current is called unsymmetrical fault.e.g; L-L , L-L-G , L-G fault to solve the unsymmetrical fault, the fault current can be represented by sum of the sequences--zero phase sequence , +ve phase sequence , -ve phase sequence. where L:line G:ground
