Does all the output contacts (N/O as well as N/C) of a Numerical relay operate when relay receives a binary input/inputs or contacts are designated to specific logic input/inputs and only these contacts operate?

0 Answers  

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resistance of transformer oil=?

1 Answers   HCL,

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The inexpensive way to improving energy efficiency of a motor which operates consistently at below 40% of rated capacity is by _____.

2 Answers   IFFCO, Sanmar,

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What is the scale analysis for condensor of HVAC system

3 Answers  

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1.What is the proper definition of power system stability? 2.some times a blue spark is visible in the secondary side of a distribution transformer at the contact position of bushings and fuse wire,why?

1 Answers  

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Hello friends, Can anyone explain the concept of zones in Bus bar protection and how can we differentiate the main zone and check zone in Bus bar protection

1 Answers   ABB, NCC,

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HOW TO CALCULATE THE CABLE SIZE FOR POWER CABLE, CONTROL CABLE AND INSTRUMENT CABLE

1 Answers   TurboTech,

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How Can I calculate for the photometrics requirements for a street lighting? Data given are: 45 units of 6 meter light pole with 150 watts metal halide lamp, 220 volts and installed in a promenade area.

0 Answers  

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what is the meaning of Ring Mean Unit in a substation or trasformer also tell me its oerpuse?

4 Answers   NPTC, NTPC,

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what is v/f control in VFD?

0 Answers  

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how give earthing to shif and aeroplane which is away from earth?

1 Answers   ABC,

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what is necessity of using isolation transformer?

4 Answers   NTPC,

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