Answer / pollachi

Unity load pf

Why have the transformer one earthing to their neutral? Why have the transformer many earthing to their body?

1 Answers  

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what is the knee point voltage ? what is differtial rela? what is impedance and % of impedane? what is the postive phase sequance ? negative phase sequane ? and zero sequance impedance ? what is sortcircuit calculaion? why take calculation? define stabilty test ? why? what sentivity test? define merz protection ? what is the burden ? class 5p10, accracy, metering ct take knee point voltage test thet time what heppan why dont take knee point test to metering ct?

0 Answers  

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how induction motor starts?

4 Answers   JSL,

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How I calculate the ELCB for circuit breakers?

0 Answers  

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In the ACB breaker capacity is 2000Amp but this each phase taken 1250 But total beldibg load is 600amp or 700amp watt is the problem

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How can we decide cable size from HT panel to Transformer? Please give you reply with some examples.

0 Answers  

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What is the difference between Ac curent & DC current

2 Answers   Juniper Networks,

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for same rating of a transformer and induction motor which one will have higher magnetising current flowing?

2 Answers  

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1600 KVA ka transformer hi aghar lt side par 800A aur voltage 420 ho to HT side ki cable ki rating keya ho gi?

0 Answers  

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We have drive feeding an output contactor for a 5000 hp motor @ 5kV application. The motor FLA is 629amps x 1.25% service factor = 786.25 amps The cable that we current have in place between the drive and the output contactor is 350kcmil- MV-105 (parallel cables). Per the NEC table 310.60 (C) (69). This show the cable ampacity is at 615 amps per cable for a rating of 1230 amps. We have derated the cable for the cable tray and the multiple cables application and our calculations show that after the correction factor factor we are at 922amps. 1230 amps x .75% correction factor factor = 922.5 amps. The customer is driving us to then use another safety factor of .25% off of the already derated cable. Can you please provide a longhand calculation for your solution on this application?

0 Answers   Siemens,

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Explain in brief description about the operation of DG sets.

0 Answers   Siemens,

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who iz power minister ?? :P

1 Answers   IOCL,

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