Contactor Coil Current Rating?

[joel89]

Just out of interest what current does an AC Contactor coil take? I keep using 300va transformers in my panel builds but never take coil currents into account mainly only have up to 8 contactors. Cheers

 

[LeckyBill]

most are designed to work on 3 phase so at least 400 voltes

 

[joel89]

No not voltage I'm talking about coil pulling in... I know theyre 3ph

 

[ian.settle1]

most are designed to work on 3 phase so at least 400 voltes

What a load of twoddle contactor coil voltages depend upon what the voltage of the control circuit voltage is which can be 24, 110, 230 or 400 volts

 

[joel89]

I want the coil current when pulling in, not the control voltages...

 

[Bobster]

It will have it written somewhere on the contactor, or in the data sheet with it.

Remember building panels to design your control Tx for all the items, plcs indicator lamps etc...

Most of our motor mccs use a 3kva Tx.

 

[LeckyBill]

No not voltage I'm talking about coil pulling in... I know theyre 3ph

same applyes

 

[Sintra]

Just out of interest what current does an AC Contactor coil take? I keep using 300va transformers in my panel builds but never take coil currents into account mainly only have up to 8 contactors. Cheers

Measure the resistance of the coil then use good old ohms law.

 

[joel89]

Not its load current it will take, i.e 32a, 25a just simply the coil when energising 1a-2a??!

 

[THE DUKE]

Rated coil consumption of the Schneider LC1D09 thru LC1D38 contactor, 50 or 60 hertz AC control
70VA inrush, 7.5VA sealed
Was told by a transformer manufacturer your typical control transformer is good for three time rated va for inrush of contactor coils

 

[joel89]

Cheers Duke, i use schiender lc contactors

 

[THE DUKE]

Ask your wholesaler for schneider catalogues they have loads of info coil va, contactor ratings for AC and DC, resistive and inductive loads lots of bedtime reading one catalogues in particular to ask for is The essential guide to automation

 

[Darkwood]

Contactors and relay coil currents vary between products and ranges -their is no 1 answer.... check the info supplied or go on their website - AC / DC and voltage rating will have large effect to the nature of the coil resistance

Typical values for small relays 12/24v ac/dc are 0.5 to 1.5 watt and 230v 1-5VA but again i stress its variable

Inrush also varies as with coil resistance but typical 5-10 times on inrush.

 

[Knobhead]

It would help if we knew the make and type

 

[D Skelton]

most are designed to work on 3 phase so at least 400 voltes

epic fail!

 

[Knobhead]

epic fail!

About right for our Bill.

An epic waste of web space.

 

[netblindpaul]

I was going to comment, but there seems no more to say, apart from if he is using 400V control for his panels then he is breaking the law if he supplies them to anyone, including himself!

 

[davethsparky]

Judging by other posts I very much doubt he goes anywhere near panels, or 3 phase for that matter. He has the distinct aroma of a Electrical Trainee about him!

 

[dazza1981]

leckybill.......shhhhhhhhhush

 

[RWJ]

Judging by other posts I very much doubt he goes anywhere near panels, or 3 phase for that matter. He has the distinct aroma of a Electrical Trainee about him!

I think this - http://www.electriciansforums.co.uk...ning-today-all-these-cowboy-2.html#post820520
and this - http://www.electriciansforums.co.uk.../499-tradeskills4u-feedback-5.html#post643931

seriously points towards thinking he is!!