Inverter, Atex motors, star, delta

[Joe9]

Dear Friends,

I need technical solution for my problem;

Specification:
I have two motors, type:

1. HCT/ATEX 45-2T-2 (R/MIN=2800), (400V-3,60A), (KW-1,50)
2. HCT/ATEX 45-2T-3 (R/MIN=2860), (400V-5,00A), (KW-2,20)

Also, every motor has its own inverter:
Inverters are from INVERTEK DRIVES (Optidrive).

My project is to provide thoose two motors working in first (lower speed) all the time , and sometimes they need to work in second speed (higher - maximal possible).
Those speeds must be provided by changing frequency with inverter.

My questions are:
1. How to know which maximal frequency (Hz) are motors made for? - ( I think maximal frequency would be the higher speed)or they can work on any frequency?
2. Also how to make electrical diagram correctly ( If I have inverters; do I use only delta connection or I can use only star connection. Or I need to use star for start and delta for running?
3. Can somebody help me to design electrical diagram?

I hope you can understand my problem, also I will be very happy if somebody can solve my problem, I am affraid of making false wiring diagram.

With kind regards,

Joe
9

 

[Skogsgurra]

OP says:
1. HCT/ATEX 45-2T-2 (R/MIN=2800), (400V-3,60A), (KW-1,50)
2. HCT/ATEX 45-2T-3 (R/MIN=2860), (400V-5,00A), (KW-2,20)

The document in posting 1 Nov 14 15:41 says: 230/400 V and 400/690 V für Leistungen über 5,5 PS.

That means that your motors are 230/400 V, because 1,50 and 2,20 kW is less than 5,5 HP.

So, for 400 V - connect in wye.

See? There are lots that you need to understand. You really need to get competent help. Or just don't do what you are trying to do.

I really mean it. Seriously.



Gunnar Englund

http://www.gke.org

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Half full - Half empty? I don't mind. It's what in it that counts.