Answer / iamdon

Earthing of a machine is checked with the help of a devies
called earth tester.For proper earthing, reading of tester
should be from 4-10 ohms approximately.

Author:arbelectbit@yahoo.com

Answer / k.cs

This method of checking is ok,but there is a chance of
electrical shock may be felt by testing person by mistake.
Hence it is always advisable to test at electrical socket
with out connecting machine in the socket, that is there
willbe a 1-3 voltages should be in between neutral and
earth points.

Answer / puneet

earthing we can check by measuring the voltage betwwen phase and machine earth point if we get the voltage then it is ok

Answer / avi gulia

earthing can be checked by either checking voltage between the phase and earth or by checking voltage between the neutral and earth it should be 2 to 4 volts.

Answer / b soni

Earthing of a machine is checked with the help of a devies
called earth tester.For proper earthing, reading of tester
should be from 1-5 megaohms approximately.

Dg daily a check duration

5 Answers   AirIndia,

---

Why a Transformer Noise during its running condition ??

11 Answers   NTPC, UPPCL,

---

How to calculate Voltage regulation of 22 KV Over head Line.

0 Answers  

---

Why you are switching off arc protection mcb when you are taking shutdown for lv board.

0 Answers   KSEB, L&T, Siemens,

---

Is it necessary to place tap changer in secondary winding or we can use on both sides?

3 Answers  

---

---

A MACHINE WHICH HAVE 1000rpm SPEED IS LARGER IN SIZE AS COMPARED TO THAT OF A MACHINE WHICH HAVE 1500rpm.WHY ?

2 Answers  

---

how to select size of hardware for linking aluminium busbar is it depend on area of busbar or current flowing through bus bar

0 Answers  

---

if sf6 gas low in gis what will happen

0 Answers  

---

For polarity test on a 11/3.3kV 2.5MVA delta-star Unit Auxiliary transformer,415V 3-phase supply was applied at the HV. Connection between Aa was made with a 2.5mm cable. As soon as power was switched on the cable caught fire and burnt. This test was then abandoned. It is noteworthy to say that a similar cable was also used in a similar transformer for the same. The cable did not burn and test was successfully completed with good result. What is wrong? Please, help me out.

3 Answers  

---

CBCT selection

0 Answers  

---

What is the normal value of delta in rotor angle stability or transient stability? Why it selected so?

1 Answers  

---

why we still use sinusoidal waveforms for transmission and utilisation (we know generation is sinusoidal), instead of other ac waveforms such as triangle, sawtooth, square etc.,? is there any mathematical derivations to prove sinusoidal is efficient than others?

1 Answers  

---