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Anonymous Poster #1

Variable Speed Drive

04/01/2013 9:19 PM

Hi all, I am installing a new motor to a VSD. The motor nameplate voltage is 380v to 415V at 50Hz.

When I enter the nameplate values on the VSD should I enter 380v, 400V or 415V?

Is this value critical for an auto-tune?
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Fredski
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Join Date: Feb 2011
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#1

Re: Variable Speed Drive

04/01/2013 10:24 PM

sounds like you could use a little on site help to make sure you get it right
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Fredski
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#4
In reply to #1

Re: Variable Speed Drive

04/02/2013 6:52 AM

this is the type of question that makes me stop....should I advise someone or back away and not provide them with info that might go right over their head and cause a bigger issue? the internet is cool but it doesn't have all the answers. I like helping but this website shouldn't be viewed as an answer- all for all things.
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PWSlack
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#5
In reply to #4

Re: Variable Speed Drive

04/02/2013 7:12 AM

Signposts for the route are often more valuable than arriving at the destination.

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Codemaster
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#6
In reply to #5

Re: Variable Speed Drive

04/02/2013 9:01 AM

Very philosophical, but wasn't that before satnavs came out?

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PWSlack
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#7
In reply to #6

Re: Variable Speed Drive

04/02/2013 11:08 AM
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Anonymous Poster #1
#13
In reply to #4

Re: Variable Speed Drive

04/04/2013 5:31 PM

good idea to stop.
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lyn
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#2

Re: Variable Speed Drive

04/01/2013 10:52 PM

Fredski's right. Get some help.

Maybe you, and this guy: Circuit Breaker Protection can take an electronics class together.

So much for the motor and VFD.

What's your supply voltage?
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Codemaster
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#3

Re: Variable Speed Drive

04/02/2013 5:42 AM

The motor can run at any voltage in that range, but likely to happiest at somewhere in the middle, say 400 volt. So I would assume if you enter that into the VSD it will output 400 volt at 50 Hz, and the appropriate voltage at other Hz, provided the supply voltage is 400 or more.

If supply is 380 volt it's still OK. In principle, at reduced Hz (hence reduced output voltage) it could output a slightly more suitable voltage (ie closer to the mid-range) but I don't know whether your VSD is that clever, and it should work OK anyway.

If the supply is less than 380 volt you need to have another think.

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jack of all trades
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#8

Re: Variable Speed Drive

04/02/2013 2:23 PM

Is this value critical for an auto-tune?

Not really, but you should be setting the motor voltage parameter to match the supply voltage (whatever it is in your location) for optimum operation.

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Grochy
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#9

Re: Variable Speed Drive

04/02/2013 10:50 PM

I would pick a middle value and enter it. The voltage coming into our site varies from 385v up to around 420v depending on the time of day.
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Jimh77
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#10

Re: Variable Speed Drive

04/03/2013 1:07 AM

It would help if you logged in with a real name to get real answers.

I installed 100's of VFD's with Italian\German motors 416/50Hz using American made VFD's running 460 3Ph 60Hz drives. Just follow the MTR MFG recommendations for the setup. For me, Italy had me wire the motors for 230 3Ph, Hey, it worked, motors still running 24/7 4 years. Fish farm, pumps pump 24/7/365/1146.

Welcome to CR4,

There are a lot of great smart people here. If you really want serious answers, create a login.

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suresh sharma
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#11

Re: Variable Speed Drive

04/03/2013 6:16 AM

You can check line voltage, if it is within the limits then you should enter that value.

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juan J. Isdray
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#12

Re: Variable Speed Drive

04/04/2013 3:57 PM

The voltage 380-415 are within 10% admissible as per the standars so don't hesitate that in our proffesion we have to assume some time an small risk

bye
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Users who posted comments:

Anonymous Poster (1); Codemaster (2); Fredski (2); Grochy (1); jack of all trades (1); Jimh77 (1); juan J. Isdray (1); lyn (1); PWSlack (2); suresh sharma (1)

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