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Rod Ashton09/06/2018 11:28:57
280 forum posts
12 photos

Hi - I have fitted an ABB MT2000 3ph. motor to my Myford. Using an ABB ACS 300 inverter. I cannot get much top speed and have very little torque. Pretty much useless . If anyone could advise. Would be most grateful.

John Rudd09/06/2018 12:11:57
1364 forum posts
58 photos

start with basics...

What ac voltage in- inverter voltage out....240-240? Or 240-415

Has the motor been correctly supplied? Is it wired correctly? 415 for Star or 240 for Delta?

Oldiron09/06/2018 12:27:00
254 forum posts
17 photos

As JR said. You need to match the motor to the Inverter with regard to Volts Hz etc. If they are new and supposedly matched I suggest you call the supplier.


Rod Ashton09/06/2018 13:23:04
280 forum posts
12 photos

John - Bit out of my depth here as you may have gathered. Says on the inverter :- Input - 208/240V, 8.9a, 48/63 Hz. Output - 0/u1in V, 4.3a, 0/500Hz.

David Jupp09/06/2018 13:55:27
651 forum posts
16 photos

So output voltage varies between zero and the input voltage (the unit doesn't include a transformer to step the voltage up).

To match this the motor would normally be expected to be wired in Delta (3 straps wired across the terminal box, with no connection between them). Each output from the ACS300 goes to one of the 3 straps in the terminal box. And remember the Earth connection.

KWIL09/06/2018 15:04:33
3064 forum posts
56 photos

Have youi got the Manual?

Martin Cargill10/06/2018 12:12:12
99 forum posts

Have you tried their Technical helpline? Most invertor suppliers provide telephone technical backup for their products and their engineers are very good at guiding you through the setup for their products.

Rod Ashton10/06/2018 13:28:27
280 forum posts
12 photos

OK folks thanks for the info. Got the manual and spoken to their helpline. It seems the consensus that I have it wired in star and not Delta. Will rectify in the morning.

Rod Ashton13/06/2018 07:27:59
280 forum posts
12 photos

All issues resolved. Working properly now. Re-strapped from Star to Delta as you advised. Thank you gentlemen for your kind assistance.

John Rudd13/06/2018 11:43:36
1364 forum posts
58 photos
Posted by Rod Ashton on 13/06/2018 07:27:59:

All issues resolved. Working properly now. Re-strapped from Star to Delta.

Good to hear you got it sorted....

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