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Motor Protection, thermal time constant |
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  Apr 23 2008, 01:53 PM
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#1
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Member  Group: Full Member Posts: 61 Joined: 17-December 05 Member No.: 1,308  |
hello everybody
can anybody brief what is thermal time constant . how to find the thermal time constant if not given by the manufacturer can we find the thermal time constant with thermal time curve ram |
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 Apr 22 2009, 11:22 AM
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#2
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Junior Member Group: Full Member Posts: 7 Joined: 27-November 08 Member No.: 4,988 |
QUOTE (ram14375 @ Apr 23 2008, 01:53 PM)  can we find the thermal time constant with thermal time curve Yes, you can refer to Protection Riddle No.35 in http://electrical-riddles.com for details. |
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Jul 14 2010, 10:06 PM
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#3
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Junior Member Group: Members Posts: 2 Joined: 14-July 10 From: india Member No.: 8,743 |
thermal time constant is the cooling or heating time constant of motor.
Equation T = To e-t/time constant -- the cooling equation the temerature decreases with time. after one time constant the temperature decrease to 27percentage of initial value |
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Lo-Fi Version | Time is now: 7th September 2010 - 03:52 PM |
