Answer / bijoy

All magnetic contactors are a type of relay, but relays can
be significantly more complicated than contactors.

The contactors is primarily used for switching larger power
circuits (such as motors, for example), since the control
logic components cannot meet the current & voltage duty of
the power circuit.

Relays can be as simple as 12 V dc solenoids with 12 V, 0.5
A rated contacts. Or they can be as complicated as
microprocessor-based devices used to detect disturbances
(faults) on the power system and signal a local or remote
switching device (breaker) to trip the circuit.

Answer / sb

Relay sends information.
Contractor gives a NC or NO path when logic is TRUE.

Answer / arun kumar

Relay:-is the sensing device which detects the foult and
give the command to the ckt breakers to break the ckt.
contactor:- is a switching device which. Is used to large
power ckt.

Answer / guest

relay is a device when ever fault in the system, which
protect (or) trip the ckt from the faulty section.
relay is automatically operate when ever fault occurs.

contactor it is acts as a switch (or) isolator.
contactor is operated by manually.

Answer / 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

Why earthing done?

1 Answers   CBRE,

i need to calulate the cable size when watts are mentaind wat z the formula

1 Answers  

wht is meant by sh6

2 Answers  

hai...... tis is Hemanth. jst now completed electrical engineering... i wanna to apper for ap tranco exam... plzz send me the previous q's paper link......thanx in advance.

0 Answers  

Y phase plates are used in transmission line??? what is there need???

0 Answers  

How many types of Transformer testing..

1 Answers  

we all know voltage is a force(emf), and the force always devides if 2 or more than2 loads are there but why does the voltage remains same is parallel, it must devide na ???

0 Answers   NTPC,

If the (Motor control center)Panel work on field the relay used in panel in the case this will be damage and no indication provide on panel.fault occur in panel and MCB will not trip. how happen the relay damage in panel and what effect of panel.

1 Answers  

What is inverse definite minimum time lag relay? Where is it use?

0 Answers   TATA,

What is Servo Ventilated Motor?

0 Answers   L&T,

what is ceiling voltage in an exciter?

1 Answers   KEPCO Energy Service Company,

hi!!! i have a question that how the thermal test in winding temprature test is taken can anyone explain me in detail??? i will b very thankful!!!!

1 Answers