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grassridge
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Join Date: Jul 2010
Posts: 23

Soft Starter

01/27/2013 11:47 AM

Hi All, What would be the biggest motor I could start using a soft starter from a 50KVA genset?

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lyn
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#1

Re: Soft starter

01/27/2013 12:00 PM

It depends.

This web site may help you.

Macfarlane Generators Power Calculator
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grassridge
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#10
In reply to #1

Re: Soft starter

01/28/2013 11:15 AM

Thanks Lyn, Your tip was usefull

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redfred
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Engineering Fields - Electrical Engineering - Been there, done that. Engineering Fields - Control Engineering - New Member

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#2

Re: Soft starter

01/27/2013 12:05 PM

What a silly idea.

Do you intend on operating the largest motor we capriciously choose with this unspecified soft starter to see which will die first? You sound like the kind of person to actually replace a fuse with a larger value and then sue your electrician for burning the house down.

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Tornado
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#3

Re: Soft starter

01/27/2013 12:25 PM

What sort of load conditions will the motor face as it is starting?

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grassridge
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#11
In reply to #3

Re: Soft starter

01/28/2013 11:19 AM

It will be driving a positive displacement pump.

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JPool
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Engineering Fields - Mechanical Engineering - New Member Fans of Old Computers - TRS-80 - New Member Popular Science - Weaponology - New Member Safety - Hazmat - New Member Hobbies - Fishing - Fish On! United States - Member - New Member

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#4

Re: Soft starter

01/27/2013 12:41 PM

hemi

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Fredski
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#5

Re: Soft Starter

01/27/2013 3:06 PM

12 million horsepower
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fixitorelse
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#6

Re: Soft Starter

01/27/2013 10:22 PM

You need to supply a hole lot more information to the engineer that you need to help you with this question. I would suggest contacting your electrical supply house and they can then point you to the proper party to help you with this. If this is a real world condition, your trying to deal with.
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PWSlack
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#7

Re: Soft Starter

01/28/2013 3:48 AM

Is the motor loaded or free-spinning?

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PWSlack
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#8

Re: Soft Starter

01/28/2013 4:42 AM

It would be better to use a 50kW diesel engine to turn whatever the <...biggest motor...> is intending to turn, using a direct drive from the engine.

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TonyS
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#9

Re: Soft Starter

01/28/2013 7:13 AM

Would this generator just happen to be powered by a turbine?

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grassridge
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#12
In reply to #9

Re: Soft Starter

01/28/2013 11:24 AM

Sharp! The generator is driven by a hydro turbine with out put of 35KW.

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TonyS
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#13
In reply to #12

Re: Soft Starter

01/28/2013 6:23 PM

This entire thread and the time people have put in answering has been a total waste of time!

Please close the door behind you as you leave.

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lyn
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#14
In reply to #13

Re: Soft Starter

01/28/2013 6:28 PM

Turn out the lights, the party's over! Credit to Willie Nelson, with help from Dandy Don.

Willie Nelson The Party's Over - YouTube
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Users who posted comments:

fixitorelse (1); Fredski (1); grassridge (3); JPool (1); lyn (2); PWSlack (2); redfred (1); TonyS (2); Tornado (1)

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