Answer / farzan danish

earthing resistanc should must be less than 1 ohm

Answer / nithya

generally electricl resisitance should be a 2 ohms. suppose
u are in a building the individual ohm is 1.2 ohm. and group
should be a 0.8 ohm.

Why do you have to use Protecion relay with the function MTB ( Mechanical Trip Button ) for electrical system.

0 Answers   DT Technologies,

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when transformer in load condition neutral earth testing wheater we can do it or not

1 Answers  

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usually why bettery voltage are 1.5V, even if you open a 9V battery there are six 1.5V batteries in series. is it not possible to increase this voltage other than putting in series

1 Answers  

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what is first ground fault & second ground fault. This is used in rotor protection of alternator.

1 Answers  

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when we r using 3.5 cable for a bldg. and put laod on each phase using the neutral and neutral is the return paht for the phase so the current of the neutral must be Ir+Ib+iY (return).But the size of the netural is .5 as comper to the phase.

2 Answers  

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any calculation method for decide cable size for current?

1 Answers  

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If i am running of spindle at 2000rpm ,but How to spindle stop at the second I am resetting the machine in CNC machines

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HT/LT PANEL TEST?ALL TEST

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How to calculate the NGR value for a 2.7MVA Transfomer, 11KV system where the fault current has to be limited to 50A?

1 Answers   Sterling Wilson,

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What is the calculation for 1000Amps Air circuit breaker relay settings.

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IS THE ANY DIFFERENCE B/W GENERATORS & ALTERNATORS

6 Answers  

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What are documents to be required for export of the material?

1 Answers   Siemens,

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