My ups output shows 230 v between phase and neutral,but show zero between phase and earth.Is the system/installation is correct.If not what will be the possible reasons

4 Answers  

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diff b/w normal grounding and resistance grounding

0 Answers  

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What is the relationship between the sending end and receiving end?

4 Answers  

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What are the differences between single phase and three phase?

0 Answers   ABB, Essar,

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if voltage bt phase & nutral is 38v in a panel board . whats the root cause.

0 Answers  

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what relation between transmission line & communication line?

1 Answers   NTPC,

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what is slip?

3 Answers  

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how to build a network which step down 415v to 1v rms

0 Answers  

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Does frequency change with increasing voltage i.e 220v to 11kv? explain if not?

6 Answers  

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what is defference by mcb,mccb and mpcb

4 Answers   Bhel,

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how we can measure the dc current instead of clamp meter ?

1 Answers  

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We use ungrounded DC system (220V/110V) for control and protection system in substations etc. Suppose we have long 2 core DC cables running from our DCDB in control room to the load (length of around 2 to 3 km). Do we need to protect these long DC cables from earth leakages or not? If yes how?

5 Answers   Siemens,

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