Changing out reversing motor starter with new parts.

Hello,

I'm in a little of a query. We had a sticky contactor that needed to be replaced. One of the engineers ordered a whole new set of 2 contactors and an overload relay. Issue is that the contactors and overload relay do not match up to the ones existing in terms of terminals.

Old contactors each have a wire going to 22 NC and 1 contactor has a wire going to A2-.

The overload has a wire going to NO 13 and one to 14.

The new set of contactors only have A1 and A2 besides the line power (L1,2,3).

The new overload has NC 95 and 96 as well as NO 98 and 97. (Idk why 98 is on the left for NO)

My thought is that NO 13/14 from old contactor go to NO 98/97 on new overload. Also, the NC 22's on both old contactors go to NC 95/96 on new overload. A2 from old goes to A2 to new.

My question is whether that is correct and whether I'm forgetting something because the new contactor with how I described my setup would not have anything going to A1 which I'm 99% sure I need something going there.

Thanks ahead of time for any assistance.
 
A schematic would definitely help.

The old contactors most likely have internal wiring to complete the A1 coil circuits, because you do need something at both A1 and A2.

Probably (again, schematic to verify, I do not know the setup for certain) the NC 22 from each old contactor receives the unique control signals to engage each contactor.

Then, each contactor's NC 21 is attached internally to the A1 of the opposite contactor, that way, either coil can only fire if the opposite contactor is physically OFF, preventing shorting between lines.

Then the two A2 terminals are joined and go to the P/S negative.

If the new contactors don't have the NO 13/14 contacts, they probably use an auxiliary contact block.

Does the old A2 terminal go to the OL's NC contact? This would shut down both coils in case of an overload. The NO 97/98 are used to monitor the status of the OL.
 
I like those Fuji ones, but they do need the aux contacts...

https://www.automationdirect.com/ad...agnetic_contactors/auxiliary_contacts/sz-a11t
https://www.automationdirect.com/ad...agnetic_contactors/auxiliary_contacts/sz-as1t
https://www.automationdirect.com/ad...tors/mechanical_-a-_latching_interlocks/sz-rm

The first option might be the best if you are using reversing interconnect bars, since those bars will not allow enough room for anything side-mounted in between the two contactors. Any side mount ones might get in the way of devices on the DIN rails to either side.

Again, I would definitely recommend verifying the schematic of your entire control circuit before accepting any advice here. This is just shooting in the dark without knowing your control circuit.
 
I like those Fuji ones, but they do need the aux contacts...

https://www.automationdirect.com/ad...agnetic_contactors/auxiliary_contacts/sz-a11t
https://www.automationdirect.com/ad...agnetic_contactors/auxiliary_contacts/sz-as1t
https://www.automationdirect.com/ad...tors/mechanical_-a-_latching_interlocks/sz-rm

The first option might be the best if you are using reversing interconnect bars, since those bars will not allow enough room for anything side-mounted in between the two contactors. Any side mount ones might get in the way of devices on the DIN rails to either side.

Again, I would definitely recommend verifying the schematic of your entire control circuit before accepting any advice here. This is just shooting in the dark without knowing your control circuit.
Thank you. We do have the interconnect bars, and the interlock. I've been shooting in the dark as well because the site is remote. Your help is appreciated.
 
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