Answer / subra

DC system also earthed,
In Tele communication equipments are working in 48V dc system
In this DC system positve is directly Grouded( earthed )
Normally this system is called -48v DC system

Answer / ramprasad

DC has no Leakage current but AC has because there are 3
phases in AC and one common neutral points in AC star
connection

Can you explain the phase displacement between primary and secondary of power transformer of any vector group(for ex)?

1 Answers  

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Im designing APFCR Panel for 600 KVAR.I need to calculate the full current so that i can choose the capacity of isolator/Breaker.Kindly suggest with formula.

1 Answers  

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OHMS LAW

9 Answers  

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why are we using resistor in NGR ?

1 Answers  

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As we use capacitor bank in 3ph ckt to improve PF, can we use capacitor in single ph domestric use, in house we have Fan,Mixer,electric cooker,iron,tube choke they also lag the system,because it is inductive load. if it is possible to improve PF of single ph system-- if yes- type of capacitor to be used,connection diagram, working in detail. if no-- list it.

0 Answers  

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why two point starter,three point starter, four point starter cannot be used for A.C machines?

2 Answers  

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how dose servo motor works

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what is the formula for calculating the phase clerance between two phases and phase to earth how to calculate the cable for a motor

0 Answers  

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Is RTCC panel needs any control supply.

0 Answers   HPCL, Schneider,

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