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isolators and motors
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<blockquote data-quote="KR Sol" data-source="post: 28458" data-attributes="member: 1588"><p>Evening all, I have had a bad day and this may be the cherry on top but I would think the motor is larger 13kw. kw=v*amp*pf*1.73/1000 therefore kw= 415 * 20 * 0.90 * 1.73/1000. I may have done something daft and if i am please say what. the other point is, you say they are starting and stopping the motor alot the rule of thumb (The one I was told) a motor should not be started more then 3 times an hour this is to stop damage and stress. Is this a new installation or a alteration? if they are altering it why? I get a gut feeling (it may be something i ate) they are trying to cut corners, just be careful you are putting your name to it.? :|</p></blockquote><p></p>
[QUOTE="KR Sol, post: 28458, member: 1588"] Evening all, I have had a bad day and this may be the cherry on top but I would think the motor is larger 13kw. kw=v*amp*pf*1.73/1000 therefore kw= 415 * 20 * 0.90 * 1.73/1000. I may have done something daft and if i am please say what. the other point is, you say they are starting and stopping the motor alot the rule of thumb (The one I was told) a motor should not be started more then 3 times an hour this is to stop damage and stress. Is this a new installation or a alteration? if they are altering it why? I get a gut feeling (it may be something i ate) they are trying to cut corners, just be careful you are putting your name to it.? :| [/QUOTE]
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