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Participant

Join Date: May 2010
Posts: 2

How to Wire Motorized MCCB in Auto and Manual Operation

04/20/2012 3:57 AM

Dear All,

I have two panels with Coupler All breakers are MCCB, so i need to make wiring for Auto-manual Operation but i dont understand what the contacts with motor are! are they Start Stop Push Butons or One start then Aux. and One Stop with Aux. if this Correct whare i have to make Electrical interlock?

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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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#1

Re: how to wire Motorized MCCB in Auto and Manual Operation

04/20/2012 4:06 AM
  • Manufacturer?
  • Model number?
  • Rating?
  • Availability of manufacturer's information?
  • Availability of facility's standard drawings - is this 're-inventing the wheel'?
  • Etc.
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kvsridhar
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#2

Re: how to wire Motorized MCCB in Auto and Manual Operation

04/20/2012 4:13 AM

You should have received a wiring diagram along with the MCCB ? Each manufacturer has his own way of wiring, so one can't generalise.

In general, there needs to be a two-position selector switch for Auto / Manual selection. Only one mode of operation possible, since the selector switch will stay put in one position only.

The charging mechanism will have a freewheeling clutch in it somewhere, so that overcharging is not possible. There will also be a microswitch to cut off supply to the motor when charging is complete.

So, you see, it is quite complex and you need to scrupulously follow the wiring diagram.

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lyn
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Join Date: Oct 2008
Posts: 42355
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#3

Re: How to Wire Motorized MCCB in Auto and Manual Operation

04/20/2012 12:15 PM

Flavor of the week:

Basic wiring diagram Molded case circuit breaker MCCB or

USE AT YOUR OWN RISK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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ramvinod
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Join Date: Jun 2007
Location: chennai,India
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#4

Re: How to Wire Motorized MCCB in Auto and Manual Operation

04/21/2012 1:30 AM

There are two types of motorised MCCBs in the market.

Stored energy system

Direct drive system

wiring diagrams and operational philosphy will vary with the system

Also different manufacturers have different wiring diagrams.

Please get the details from MCCB supplier.

Further you may additionally require Auto/manual selector switch,ON Push button,OFF Pushbutton.

Once you get the wiring diagram,if you still require any help ,you may contact us with the wiring diagram.

Generally the wiring diagram comes with the MCCB

Since you have two incomers and one bus coupler the MCCBs should have auxiliary contacts.These auxiliary contacts may not be adquate for interlocking, therefore you may also require additional auxiliary control contactor with 4 NO+4NC combination.

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rttht
Participant

Join Date: Apr 2012
Posts: 1
#5

Re: How to Wire Motorized MCCB in Auto and Manual Operation

04/21/2012 3:36 AM

Your panel builder company will be give it's drawing otherwise you should provide your contact number. By telephone we can discuss better.
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Anonymous Poster #1
#6

Re: How to Wire Motorized MCCB in Auto and Manual Operation

04/22/2012 5:22 PM

Based on the questions you ask I would think that the best push buttons you can use are those on your phone. You can get someone who knows what they are doing - if you mess with something like this you can do a lot of harm if you get it wrong.

_ Use the phone - it could be a lot cheaper than you think.
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Anonymous Poster (1); kvsridhar (1); lyn (1); PWSlack (1); ramvinod (1); rttht (1)

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