ups and invertor battery selection chart and full formula

2 Answers   APC,

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What is systematic error?

0 Answers  

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WHAT IS THE DIFFERENCE BETWEEN UNDERVOLTAGE COIL, CLOSING COIL AND SHUNT TRIP COIL OF AN ACB?

2 Answers   Alstom,

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What is the function of RCCB? What are the different sensitivity ratings & each application?

6 Answers   Wipro,

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If a contactor need to replace with faulty one. what I want to check?

2 Answers   Bhel,

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If any cable burnt how can we identify it burnt by high current of high voltage? 

0 Answers  

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How to calculate electrical Induction motor heating and cooling time constant,11KV,2850,12P,SCIM

2 Answers   Bhel, Regal Beloit,

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why do we lay up the core of a cable?

0 Answers  

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Why the wave trap is put in Y phse only in switchyard?why not in other phases?

1 Answers   IAG Automation, REL,

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1.What is the difference between isolators and circuitbreakers? 2.What is bus-bar?

1 Answers  

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A 100 kVA , 400 v/250 kv testing transformer has 8% leakage reactance and resistance on 100 KVA base . A cable has to be tested at 500 kv using the above transformer as a resonant transformer at 50 hz . if the charging current of the cable at 500 kv is 0.4 A find the series inductance required . Assume 2% resistance for the inductor to be used and the connecting leads . Neglect dielectric loss of hte cable . what will be the input voltage to the transformer ?

0 Answers   L&T,

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what is the difference between online and offline UPS?

4 Answers   Prestige,

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