if a 3phase motor runnig in star delta starter with full
load of its,and its rated 15 amps.now we conneted over load
thermal relay at its main contactor,here what will be our
amps sittings?
Answers were Sorted based on User's Feedback
Answer / pillay
If star delta connection it will have 6 wires . so the amp setting of the TOR WILL BE FULLLOAD AMPS /ROOT 3
15/1.732 =8.6 AMPS
| Is This Answer Correct ? | 6 Yes | 2 No |
Answer / k.prakashchandra
The thermal relay is coeected to mains and not after the
starter.The setting may be at 110 to 120 % 0f full
load.i.e.16 to 18 A
| Is This Answer Correct ? | 1 Yes | 4 No |
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i want to ask that as everybody knows that in star connection on star point is called neutral. my question is that why on that poin called neutral. what is the reason behind it. what is the logic behind it. i heared somewhere that on this point all phases current become zero thats why. if this answer is right then prove why on that point is current become zero. if this answer is not right then tell me the right answer. post ur answer here or on my mail address. m.ikram786@yahoo.com m.ikram555@gmail.com. thanks.
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