Answer / doli tomar

When a relay is used to switch a large amount of electrical
power through its contacts, it is designated by a special
name: contactor. Contactors typically have multiple
contacts, and those contacts are usually (but not always)
normally-open, so that power to the load is shut off when
the coil is de-energized. Perhaps the most common
industrial use for contactors is the control of electric
motors.

Answer / sdr

The function of a contactor is to make or break the circuit
on receiving a command.It is used to design auto ckts.

Answer / baljeet singh

The contactor means the contact to make or break the circuit with useful protection.basically contactor used in starter circuit.

Answer / dilawer

contactor has main function to control the power through
low power (push button etc.)

Answer / michael

Contractors are used to make and break high current circuits basically in industrial motors

Answer / raghavendra m.

Contactors are electrically control switch used to switching electrical circuit.

Answer / s

function of contactor is to make or break circuit

Answer / bagh ali

device used to make or break the circut

Answer / sridhar

where the no. of operation is more, this contactors are
used.

what is the purpose of supervision relay coil

1 Answers  

following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?

0 Answers  

What is the transformenr turns ratio.

5 Answers  

single phase brower fan with control starter. *problem is when operate it.It will be trip.

1 Answers  

How transformer winding & oil gets heat.

3 Answers  

what is the meaning of Air condition "TON"

3 Answers  

why sometime we get electrical shock while touching the ballon of dish tv connection ? which we should not get.

0 Answers  

Tell me about ur past electrical maintanence job

0 Answers   Apollo Power, Solar,

What is Exitation voltage and Exitation current? What is the function of these in Alternator?

2 Answers   TC, Tisco,

Why selected cable colour red yellow and blue in 3 phase Electrical system?

9 Answers   Crompton Greaves, Essar, Gridco,

why the admittance matrix or y bus matrix of a large network is called sparse matrix?

3 Answers  

WHAT ARE THE SITE TEST APPLIED ON A SURGE ARRESTORS? DO MEGGER TEST APPLIED ON SURGE ARRESTOR? IF YES THEN WHAT ARE THE ACCEPTED IR VALUE REQUIRED FOR SURGE ARRESTORS FOR VOLTAGE LEVEL 11KV, 33KV, 66KV 132KV, 220KV AND 400KV?

5 Answers