what is the difference between relay and a contactor.
Answer Posted / salhashakir
Relay- electrical device such that current flowing
through it in one circuit can switch on and off a current
in a second circuit
Conductor- is a material which contains movable electric
charges. In metallic conductors such as copper or aluminium
| Is This Answer Correct ? | 4 Yes | 23 No |
Post New Answer View All Answers
A 100 kVA , 400 v/250 kv testing transformer has 8% leakage reactance and resistance on 100 KVA base . A cable has to be tested at 500 kv using the above transformer as a resonant transformer at 50 hz . if the charging current of the cable at 500 kv is 0.4 A find the series inductance required . Assume 2% resistance for the inductor to be used and the connecting leads . Neglect dielectric loss of hte cable . what will be the input voltage to the transformer ?
how can i use REF and diffrencial relay both in 1 CT core for transformer protection?
Application Comparison between 22KV (UE)and 33KV (E) system. Are we allowed to use 33KV (E) cable in lieu of 22KV (UE) cable. What are the technical disadvantages.
Can you used moeller lzm1 mccb in a dc system with 125vdc and 20ka short circuit current , beside is it have 24 or 48 volt shunt ? Beside how long current can through from An MCB shunt contacts? (like Z7-AS 24 V)?
Explain about 3 phase motor fault current calculation with examples?
if 3400kw slipring motor rotor shorting done and motor started on mv drive ,what will be the rotor shoring current
How will A Medium voltage circuit breaker(11 kV voltage level) operate under short circuit fault condition whether It is having short circuit release like Low voltage circuit breaker or relay should be given?
What is the difference between indoor and outdoor transformer
why transformer ratings in kva? & DG ratings in kva? & Motor ratings in kw/HP?
Classify driling machines.
Single line diagrams for star to delta and DOL starters.
why we use four type of phase angle difference between pimary & secondry winding of a transformer & where we use them?
how to calculate current and voltage in a same circuit?
IN dc capacitive reactance is??
high voltage transformer input voltage,current and amps rating..distributed transformer input voltage,current and amps rating...