why dc moter are not earthed ????

2 Answers  

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what is Insulation monitoring device. where it is used? (in switchgear room or control panel or in field equipment)

0 Answers  

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Earth leakage relay basic knowledge principle

0 Answers   Radiant,

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what is the difference beteen differential protection and over current protection of an alternator

2 Answers   GVK,

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2. The heaviest and lightest strings on a certain violin have linear densities of 3.0 and 0.29 g/m. What is the ratio of the diameter of the heaviest string to that of the lightest string, assuming that the strings are of the same material?

1 Answers  

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Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.

0 Answers   Pride Hotels,

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What is the max value of neutral current that can be allowed in system?

0 Answers  

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How does a television work?

0 Answers   Siemens,

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WHY CAPACITOR IS NOT USED FOR THREE PHASE MOTORS DURING STARTING

1 Answers   Quest,

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why current coil has less number of turns compared to pressure coil?

8 Answers   Airtel,

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Railway Basic electrical engg technical question with answer

1 Answers   Indian Railways,

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what is RNG in the DG synchronizing by PLC?

0 Answers  

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