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

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