what is the best way to start a 15 KW motor for pump star-delta or direct on line ? and from how many KW i must use direct on line ?

1 Answers  

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Installation resistance for whole installation of 16 kva & 25 KVA DTRA a) Between each conductor b) between conductor to earth c) installation resistance for each apparatus, each conductor to earth d) earth resistance for the system of earthing

0 Answers  

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How can calculate the daily electrical consumption of 7.5 HP motor, if the moter runs 24 hrs continiously. Also have to know about 3.5 hp chiller.

0 Answers   Wipro,

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What is DPR relay, And what for??

2 Answers   Engro,

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we have taken HV test of 2.5 k and Megger test on 11 kv HT cable.here it shows no fault but when we are charging the same cable with 11 kv supply why the VCB 11 kv gets tripped can anybody define the possible cause of fault ?

4 Answers   MAHINDRA,

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Bus-bar is made of which material & name of mostly used material in bas-bar design ?

7 Answers  

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difference between circuit breaker and switchgear?

6 Answers   L&T,

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why we cant use AC supply products in DC supply?

21 Answers  

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Name two low frequency oscillators?

0 Answers  

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3,12,24,33,_ ,75,150 Find the missed number in this sequence

2 Answers   HCL,

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What is Control & Relay Panel? And Remote Control Center?

0 Answers   L&T,

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why three phase three wire system probably did'nt have neutral

2 Answers   Marico,

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