Answer / ullas

grounding:
this means keeping that particular terminal as common point.
example-1.
consider the case in electronic circuitry(as with a music
system) where dc supply is used, the negative terminal is
usually grounded to other metallic parts of that system.
example-2.
take any circuitry where a number of different voltages are
used, 0-12v, 0-24v, 0-110v, 0-230v etc. here all the ov
terminals are grounded and taken it as common.
earthing:
this means making the common point to earth.the potential
of this point shall be Zero volt.
example-1.
transformer neutral is earthed to keep the potential as
zero.
example-2
equipments are earthed for better safety of living beings.

Answer / gunasekaran

earthing means zero potential grounding means which
equipment we want keep the zero potential it is connected
to earth.

Answer / query

The term ground and grounding are used in US electrical
engineering to represent electrical equipment that is
securely bonded to the ground (i.e., that on which we
stand) for safety reasons. In the UK the equivalent terms
are earth and earthing.

what is the difference between upper impedance and lower impedance distance relay?

3 Answers   Havells, Power Grid,

---

How to improve the power factor from 0.8 to 0.98? Also tell me cost vs benefit analysis.

2 Answers  

---

What are the advantages and disadvantages of the dc motors?

0 Answers  

---

sometime battery charged and then automatically charged when rectifier ON conition, is there any chances please clarify the same.

1 Answers  

---

Dear friends I want to design busbar for1600 kva transformer(i.e2100 amps) what are all the factors to be considered before selectinga busbar what are all the standard sizes of busbars what is the formula for finding current of copper and aluminium busbar

0 Answers  

---

---

what is the design factor that affects the size of a motor ?

3 Answers   Reliance, SGI,

---

What is a dc motor?

0 Answers  

---

what is the lightning arrester rating for 3.3kv system voltage

1 Answers  

---

What is power factor ?What are the benefits of improved power factor & how. Please explain with examples.?

5 Answers   ABB,

---

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  

---

what is AH of battery

6 Answers   NSIC,

---

tell me any book for current n potential trasformer with full knowledge ?

1 Answers  

---