Answer / terence

low voltage or voltage drop will cause them to chatter.

Answer / srij21

Apart from the above correct answer,chattering may happen
aslo due to the loose supply wire given to the contactor
coil and also on the coils magnetic effect.

Answer / reshi

Chattering will occur when there is no perfect contact
within the contactor, when chattering occurs the two
contacts may get weld together.This may cause a danger when
it is required to open the circuit or required to stop the
motor from the remote option.Chattering may also occur if
the contactor is undersized w.r.t load current.

Answer / korra

Can be either one of these;
1) Low voltage condition.
2) Improper armature alignment.
3) Broken shading coils.

Answer / harish - greenesol

chattering occurs due to many conditions:
1. due to loose contact
2. dust contents
3. new product will not get contact very quickly but after some periodic operation it will be rectified.
4. under coil rating e.t.c

so major is no 4 & 2 this shall be taken care by manufacturer

Answer / kyle

Chattering us usually due to a loose neutral.

Swap out all mechanical contactors with mercury contactors, and be done with it.

Answer / raghu

It is mainly because of
voltage drop at
contactor..increase the cable
core size with spare core

Answer / greg

Poor neutral circuit

Answer / bhanu dudhat

i agree with above answer and
also manufcture can add
sheded pole ring when it
design bcoz ac current flow
positive ok but naturle side
pick up not possible so and
thats reasen they add sedded
pole ring for continios hold
contactor.

Answer / selvakumar

my opinion to buy schneider electrical contactor is the best one,,,,,,,,,chattering not occur in that contactor,,,,,,,,,,

motor and transformer working with same principle so why motor rotor was roted and transformer not roted

9 Answers   ABB, Suzlon,

what should we do when the CT secodary gets open? how do we short circuit it? using tester or screw driver? not dangerous?

6 Answers  

How to see the inductance in a transmission lines

0 Answers  

what is the working principle of tube light?

2 Answers  

how can we know cable size for a given current? if any one have catalogue plz mail to vijay_raju369@yahoo.co.in

5 Answers  

what is range ACB

11 Answers  

Is AC Current Scalar or Vector Component?

9 Answers  

what is load cell? whrere its used ? how to measured?

2 Answers   Essar,

how to identify 3phase....r y b .A new make altnator how to identify R

2 Answers  

Factory acceptance test. FAT. For 132 kv transmisstion towers what is that meaning and what are the tests commonly companies perform now days.

0 Answers   PKR,

Dg pf .71 i am improve pf 0.80 what capacitor connected in dg how?

0 Answers   AVT Natural Products, EMC,

what are upstream faults and downstream faults in power system

2 Answers   Sreetech,