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## Main Question or Discussion Point

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

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