Difference between directional over current and non directional over current ?

2 Answers  

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in CNC reference how to take? what kind of input give to the servo amplifier?

1 Answers  

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4-Why we measure the insulation resistance of main core and frame in spite of that must be connected with ground before energize the transformer?

3 Answers  

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What is Phasing out test?

1 Answers  

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I want formula to calculate cable size as per load given in kw & amp.I searched many sites but didn't right answer.Plz reply me asap.

41 Answers   Armco, BEL, BGS, Biocon, BRB Cable, Crystalline Chemical Industries, DLF, Doshion, Electrical, Gold Roof, L&T, Lanco, MEIL, Oman Cables Industry SAOG, PK Services, Polycab, Sabic, SLV, System Electrical, Tata Motors, UEM, UMIC, Vega, Vertex, Voltas,

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How the Transformer oil testing is done & Why oil dielectric goes LOW & what is solution for that ??

3 Answers   NTPC,

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what is the difference b/w absolute encoder and incremental encoder?

0 Answers  

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what does hapen if suddently frequency doubled

1 Answers  

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How the oil level of the Buchholz Relay come down.

3 Answers  

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in three 3.5 core aluminium ug cable. one cable is used for one phase by shrting R,Y and B wires and other 2 cables used for Y and b phases. balace 3 neutral wires are made common and connected to load. suddenly neutral current was more than line current what is the reason behind this?

1 Answers   DLF,

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what happens when ac supply is given to D.C motor.

17 Answers  

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how can i find cable size from current rating?

0 Answers   Sintex,

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