So the E-stop picks up the contactor and the on switch goes to the VFD low level inputs?
I just realized you cannot have a VFD as the motor is 1phase, no?
Max.

 

Found this one it has an Ie of 30amps https://www.ebay.com.au/itm/New-1pc...371718230435?_trksid=p2385738.m4383.l4275.c10

 

So the E-stop picks up the contactor and the on switch goes to the VFD low level inputs?
I just realized you cannot have a VFD as the motor is 1phase, no?
Max.

Motor is 3 phase for the grinder ....on the lathe his estop is on the VFD low level inputs

 

#22 A little overkill at 30amps.
You would be better off to show exactly how you intend wiring it and post it here.
Confirm this is for the VFD wiring and a 3 phase motor.
You need an E-stop P.B. there are push-off twist-on style, then you need two P.B. for the low level input to the VFD stop/start.
Max.

 

#22 A little overkill at 30amps.
You would be better off to show exactly how you intend wiring it and post it here.
Confirm this is for the VFD wiring and a 3 phase motor.
You need an E-stop P.B. there are push-off twist-on style, then you need two P.B. for the low level input to the VFD stop/start.
Max.

Yes it s for the vfd and three phase motor will do a drawing up and post it ...I was hoping to wire the E-stop to low level or I will have to have 2 conduits running to the stop/start enclosure from the VFD enclosure 1 for low level wires and 1 for high from the contactor to E-stop

 

E-stop is always high level or power supply in, according to code. i.e. contactor coil for e.g.
Stop/start could be the PLC inputs to the VFD.
What make VFD?
Max.

 

E-stop is always high level or power supply in, according to code. i.e. contactor coil for e.g.
Stop/start could be the PLC inputs to the VFD.
What make VFD?
Max.

Not sure of the make it is just a cheapy model # is AT-2200S .. https://www.ebay.com.au/itm/220V-Va...e=STRK:MEBIDX:IT&_trksid=p2060353.m2749.l2649

 

And this is the motor https://www.ebay.com.au/itm/2-2kw-3...e=STRK:MEBIDX:IT&_trksid=p2060353.m2749.l2649

 

I assume you have the 230v 3ph model of the motor?
Max.

 

I assume you have the 230v 3ph model of the motor?
Max.

Yes 2.2kw 3.0HP 2800rpm Three-phase 415v To run it with the VFD I have to change the wiring to 240v (Delta?)

 

Three-phase 415v To run it with the VFD I have to change the wiring to 240v (Delta?)

Hopefully the motor has this option where all leads come out to the terminal posts.
Max.

 

Hopefully the motor has this option where all leads come out to the terminal posts.
Max.

Will I need to hook up a capacitor with this running through a VFD?

 

pic of plate

 

A 3ph motor does not require a capacitor.
Just 1ph.
The connections show both Star and Delta terminations.
Max.

 

A 3ph motor does not require a capacitor.
Just 1ph.
The connections show both Star and Delta terminations.
Max.

Ok I was watching a you tube and a guy changed the wiring on his 3 phase motor to Delta and then added capacitors so he must have been wiring for single phase?

 

Cannot comment without seeing the video, but he may have been trying to run a 3ph on 1ph however.
Max.

 

Wow, what a lot of discussion here. Then I see a VSD is part of the project, which changes everything. A 20 amp switch will not last long starting an 18 amp motor across the line, that is certain. Starting current at the first instant is similar to "locked rotor amps" which is seldom shown except for compressor duty motors. A VS drive is a game changer. There should be circuit protection upstream of the drive, and you need to understand the manufacturers instructions for the E-STOP arrangement, I have discovered by damaging a drive by opening the wrong side for an E-Stop.

 

Who said anything about starting the motor across the line?
The input is into a VFD!
Code says you have to have a disconnect ability and most VFD manuf show one.
BTW, you never open the output of the VFD, especially when running, there are some exceptions but it has to be done in a very controlled manner with no VFD output at the time.
Max.

 

Who said anything about starting the motor across the line?
The input is into a VFD!
Code says you have to have a disconnect ability and most VFD manuf show one.
BTW, you never open the output of the VFD, especially when running, there are some exceptions but it has to be done in a very controlled manner with no VFD output at the time.
Max.

The first four posts tend to point towards that arrangement. Not til post #5 is a VSD mentioned.

 

But by post #37 it was fairly clear!
Max.