Differentiate between Zero and Negative sequence current

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In Air circuit breaker LSIG protection unit is used. Without fault in cables (2 runs 3Cx150Sq.mm Copper, 1Kv grade, XPLE armored cable IR value is more than 550Mohm @ 500V Megger) and load section Long time Overcurrent protection is triggers and trips the unit. We changed LSIG protection with new factory tested unit. Even then fault is persisting. Please suggest the possible causes

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How generating electric power export to grid from the generating station ?

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What is a differential amplifier? Also, explain cmrr.

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How to run 1ph motor(230 VOLTS its full load amps is 4.5 ampa))with 480 volts main(we didn hav neutral)Thn we go for step down transformer.Our load 10 amps,so we conisder this amps in primary are secondary side?

1 Answers  

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How to protect the water pump by no load running.

9 Answers   Cushman Wakefield,

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what is meant by rotating magnetic filed

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assume we are put both df/dt and vector surge relay in same bus the df/dt relay setting is +5 hz an -5HZ. we want operat the vector surge relay before the df/dt how i calculate the setting of the vector surge relay.

1 Answers  

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how the works electronic energy meter?

0 Answers   Bhel,

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What is the method to solve circuit using source transformation?

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WHAT IS THE SHOPE TESTING

2 Answers   TATA,

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what work will do diffrential realay DG set

0 Answers   IG Petrochemicals Ltd,

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