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?
Answer Posted / 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 |
Post New Answer View All Answers
I have 440v power coming to facility,( not being used ) can I buy large generator, (gas) to sell power back to electrical co.
we have 3 single phase transformers. how will we generate 6 supply from 3 phase supply input
whether starting current is limited to rated current of motor through soft starting or it exceeds the rated current?
Can Anyone Answer anyone of these ? Q1) why direct SOLUTION of Load Flow Studies in Not Possile ? Q2)Why majority of Buses in power system are load buses Q3)Why one of the buses in Power system is taken as reference bus (slack or swing) Bus ? Q4)Bus Admittance Matrix is a sparce (means it contains some zero elements ) matrix , give reason
Why PT voltages are measured with respect to ground? What do u mean by voltage or current polarized.
How to select, design,size & calculate for 11 KV/33KV/66KV/132KV/220 KV/440 KV circuit breaker for HT side of transformer protection/HT distribution protection?
Is any generator is developed which is operated with out diesal or other expensive source?
if any body have question paper of railway (section engineering),then plz send me .i will thank of him/her.
i want to know d working mechanism of tafe tractors next i like to know d engine type of apache bighs can anyone help me
advantage of motor design on higher power factor . normally motors are designed for .8 power factor. what is advantage of designing at .88 power factor
What is the difference between resistance grounding system and resistance earthing system?
What are marginally stable systems?
how the testing of protection CT Testing done through Primary injection kit please describe in detail procedure...
Why is voltage is required to be within permissible range for an electrical equipment?
what is the necessity of under ground cables ??