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Anonymous Poster #1

CONTACTOR

03/23/2012 2:37 PM

REASONS FOR CONTACTOR COIL BURN OUT?
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Anonymous Poster #2
#1

Re: CONTACTOR

03/23/2012 2:43 PM

See google search...
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PeterT
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Join Date: May 2010
Location: Liverpool, NY
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#2

Re: CONTACTOR

03/23/2012 2:50 PM

Probably too many hours working, with too little sleep.

(And stop SHOUTing!)

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KJK/USA
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United States - Member - Member Engineering Fields - Electrical Engineering - Electrical Construction

Join Date: Apr 2010
Location: Mid Western USA - The Corn Belt
Posts: 1439
Good Answers: 58
#3

Re: CONTACTOR

03/23/2012 3:36 PM

Perhaps a LOT of stress also!

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TonyS
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#4

Re: CONTACTOR

03/23/2012 6:47 PM

It got fed up of you SHOUTING and committed suicide!

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JRaef
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United States - Member - New Member Engineering Fields - Power Engineering - New Member

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Location: California, USA, where the Godless live next door to God.
Posts: 4665
Good Answers: 804
#5

Re: CONTACTOR

03/23/2012 7:36 PM

Too much...

Voltage, current, useage (duty cycle), heat, moisture, dust, particles between the pole faces of the armature, bugs nesting in same...

Too little...

Voltage, current, routine maintenance such as blowing out the dust, bugs, moisture etc. from the above...

Bad...

Design, installation, wiring, environment, luck...

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soebfatehi
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Join Date: Jun 2009
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Good Answers: 15
#6

Re: CONTACTOR

03/24/2012 12:24 AM

spurious coil not from original manufacturer? poor voltage waveform in case of AC coil?
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MalcolmK
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Join Date: Jul 2008
Location: UK
Posts: 205
Good Answers: 50
#7

Re: CONTACTOR

03/24/2012 6:47 AM

Heat??

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mike k
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Location: Bristol, Tennessee
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Good Answers: 58
#8

Re: CONTACTOR

03/24/2012 12:51 PM

Check the coil for the required voltage. The instructions on the box cover will show how to connect the different voltage coils.

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yooogs
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Join Date: Mar 2012
Posts: 22
Good Answers: 1
#9

Re: CONTACTOR

03/25/2012 11:40 PM

Check whether the contactor rating is selected for continous (i.e as per type-2 coordination) operation.

This will be the major cause for contactor failure. And obviously the failure will be due to over heating of coil during continous operation.

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toink
Associate

Join Date: May 2012
Posts: 52
#10

Re: CONTACTOR

05/15/2012 6:12 AM

the reason of burning the contactor coil is, maybe the person who install is not qualified electrician he did not check if the contactor voltage is 24dcv or maybe the voltage on the contactor is 240acv he connect to 120acv !!!!! warning before connecting your machine or any electrical parst with a coil first check the voltage and second call the qualified electrician !!!!

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Users who posted comments:

Anonymous Poster (1); JRaef (1); KJK/USA (1); MalcolmK (1); mike k (1); PeterT (1); soebfatehi (1); toink (1); TonyS (1); yooogs (1)

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