What are the differents between Breaker & Contactor?

Answer Posted / jinal kania d

A Circuit breaker is a simple switch,it can make,break and carry current in normal,overload and short circuit condition.,while Contactor has two types:Auxilary and Power contactor,it can make,break and carry only in overload and normal condition.It has back up protection compulsary by HRC fuses.,While there is no need of back up for circuit breaker.

Is This Answer Correct ?    12 Yes 2 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

I am designing new project sub station with 220 kV / 11 kV, 40 MVA capacity. This project have many recifier sets, which can generate 3rd harmonics. Now I have to select vector group of This transformer. To minimise 3rd harmonics, what care should I take in selection of Transformer Vecrtor group? If it is Y-Y with open Delta tertiary then what should be the rating & voltage of Tertiary Winding?

1448


i have seen one 8.4 MW synchronous motor in a plant located in bellary it is fixed with brushless rotary rectifier ,anybody can explain its start up principle

1505


WHAT ARE THE DISADTAGES OF SINGLE-WIRE-EARTH-RETURN SYSTEM USED FOR RURAL ELECTRIFICATION?

1481


A 7 storey building has a floor area of 35,000sq.ft on each storey. On the ground floor 11KV electrical sub-station is to be erected. A load of 3kw for every 400sq.ft (p.f is 0.8) is proposed for each floor. fire pump 7.5hp, water pump 5hp, lift 2 nos, each 10hp and 20shop load of each shop is 5kw. calculate a. load each floor b. total load of building c. L.T feeders for aech floor and from transformer to main. d. distribution diagram e. capacity of sub-station/capacitor bank f. line diagram

2376


How to determine stage of Automatic Power factor controlling Relay(Apfcr)?

1693






how can i find cable size from current rating?

1320


what is the effect of earth on capacitance in 3-phase and 1- phase transmission line?

1906


1.what is the difference between transformer differential and busbar differential.2)why we are using 2 slope for trafo diif and 1 slope for busbar diff.3)what is the purpose of metrosil and stabilizing resistor in high impedance relay circuit.4)how metrosil reduce the peak volage.5)what is the funtion of stabilizing resistor

4270


Can any body tell me the different types of LT cables & their application.

1629


with out colour codeing on conductor how can be find what is r,what is b,what is y phases.....

1498


how to find the resistance and gap volatage of the diode??

1555


What is meant by stator? What is meant by rotor?

630


what is formula for calculate thermal overload in new numiricalrelay( not in bimetal relay)?

1788


how to commissioning the genset with amf panel?

1901


what is the function of impulse relay

2006