what is the difference between high impedance REF & REF, same high impedance differential protection & differential protection for Power transformer?

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How to calculate the Airconditioner capacity for a standard telecom BTS shelter?

3 Answers  

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if we have to design a small transformer of rating 1 kva or 1 mva , how can we design it?

1 Answers  

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for 644KW load which MCCB should i use

6 Answers  

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I'm looking for a mnaual set for a Teradyne J750. Softcopy would be preferred but I'll take what I can get.

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what are the energy savings methods that are existing in coal based power plant?

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what is the formula to calculate the fault level current for any substation?

2 Answers  

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While elctrical load on DG,capacitor banks kept off why so? If capacitor banks on is their any effect DG?

4 Answers   IL&FS Infrastructure Leasing Financial Services,

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UPS battery Back time = no.of Batteries * Ah of the Battery / output KVA * 130 ? what is the 130 means ? can any one help? because all are using this formula how its came 130?

2 Answers  

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what will be the min and max voltage flow from neutral to earth?

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Ceiling Fan and Storage type water heater. Discuss

0 Answers   Satyam,

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before transformer oil dielectric strenght tests are taken the oil should be allowed to settle to remove option 1 air bubbles 2 gasses 3 contamination 4 water

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