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Anonymous Poster

ETAP Motor Starting

09/09/2010 12:32 AM

In ETAP motor starting, for a sychronous generator, what does it mean by over rating? Does it mean that the generator is underload?
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sms149
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Engineering Fields - Electrical Engineering - New Member India - Member - New Member Popular Science - Genetics - New Member Technical Fields - Technical Writing - New Member Safety - ESD - New Member Engineering Fields - Power Engineering - New Member

Join Date: Jul 2010
Location: INDIA MUMBAI
Posts: 67
#1

Re: ETAP Motor Starting

09/09/2010 12:35 AM

your query is not clear........................ pls provide the details what is the gen rating and wat is the motor rating which you are going to start on the generator. and wat is the base load connected in the system when motor is started

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edsar
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Join Date: Sep 2010
Posts: 3
#2
In reply to #1

Re: ETAP Motor Starting

09/09/2010 12:54 AM

I've used an ETAP model with 3-43MW synchronous generators which are supplying multi-substations. I've added 4-250hp, 2.4Kv motors, 10MVA transformer, etc. When I run the motor starting which series of events for the 4 motors, I got the result that the 3 generators are "Over Rating". What does this mean?

I must admit, I'm still new with ETAP.
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amarnath.sn
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Join Date: Mar 2009
Posts: 51
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#3

Re: ETAP Motor Starting

09/13/2010 1:49 PM

basically you have to understand the flow of ETAP, how exactly it functions. when u make a tree of your system and fed, u should be sure if all the inputs are properly fed. In ETAP when you run your system if you get errors, then read those errors as what exactly they mean, we normally think all data fed is correct. I have also faced such problems but after reading those errors and ETAP training manual i was able to clear it.
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edsar
Participant

Join Date: Sep 2010
Posts: 3
#4
In reply to #3

Re: ETAP Motor Starting

09/13/2010 11:43 PM

Thanks for your reply. I will consider reading ETAP training manual to understand more about it.
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