Connecting 2.2kw vfd to Mains supply

[Clive S]

Hi
Me again, I hope this isn't a stupid question. Is it necessary to have the input phase correct on the ac mains side of a vfd. The reason I asked is the mains plugs over here in Austria are not orientated, unlike the British mains plugs. Using the European plug if correct orientation is required i'm going to have to use some kind of marking. I don't want to blow up the hitachi vfd as it wasn't cheap.

Cheers

Andrew

In the UK the neutral is bonding to the Earth at the consumer unit generally with the phase being fused.

But in some countries the mains is supplied by a split system ie 220V would be 110 - 0 - 110 with the earth being the 0 that is why the plugs are not polarised they also use two pole mcb's one in each leg.

I think you will be fine which ever way round you connect it. Do you know what system you have re earthing and breakers ie two pole or singe?

[the great waldo]

Hi Clive

The breakers are 2 pole according to the switch diagram on the breakers. I don't think the mains here is a split system. 3phase here is at 380v: all my larger tools that I dragged over from England years ago work fine here. From what i've seen on the internet vfd's have basic rectification at the front end so i'd imagine it should work ok. I just wasn't sure if hitachi put some kind of fancy electronics in the vfd that is polarity sensitive. I just had a look in the distribution box without the cover and the breakers are double pole but phase and neutral each use one side of the breaker.

Cheers

Andrew

In the UK the neutral is bonding to the Earth at the consumer unit generally with the phase being fused.

But in some countries the mains is supplied by a split system ie 220V would be 110 - 0 - 110 with the earth being the 0 that is why the plugs are not polarised they also use two pole mcb's one in each leg.

I think you will be fine which ever way round you connect it. Do you know what system you have re earthing and breakers ie two pole or singe?