Answer / mk

In Three phase supply ,phases are 120 deg appart and act as ref against each other .for single phase application, neutral which is commen point of phases is ref.ref is essential.ground pt is for safety where leakage current if any will pass to gnd.

Answer / naresh

ground wire is where you connect diff equipment to control their potential diff at one level.this applicable to only body parts only. like a generator where engine , alternator , radiator connect with a wire to control their potential generating due to rotetion of generating set.
and eath wire is the wire which connect between body to earth point of earth pit to control potential of equipment.
this point also imp. to human and machine safety

state basic meaning of 'INDUSTIAL AUTOMATION'?

0 Answers  

---

Earth leakage relay basic knowledge principle

0 Answers   Radiant,

---

What is power factor?

3 Answers   L&T,

---

Please help me regarding my one concern. - During earth pit testing we noticed that the Clean earth pit and dirty earth pit showing continuity (Resistance value - 5ohm) . I want to know that if both earth pit have separate location and there is not internal looping between PIT then why such continuity is showing on it . Because of this issue the field side all earthing point showing short. In PLC panel we are providing two types of earthing cable which is coming from separate earth pit (Clean and Dirty earth pit) because of earth PIT showing short our PLC is not complying spec . please help regarding this issues.

0 Answers  

---

how can i improve the power factor in domestic (230v)

0 Answers   Epcos,

---

how the length effects the ampacity of the cable? if a cable is carrying a current of 100A for 50m length then what will the effect on current if we double the length?

2 Answers  

---

what is the series parallel connection of capacitors? and how can we use these application in three phase motors for controlling torque?

0 Answers  

---

What mean by MLTP

0 Answers   Machino,

---

Can we provide 3phase wire in conduit for room?

1 Answers  

---

what is the different between earth leakage relay and earth fault relay?

5 Answers   ME,

---

Why are the cores of large transformers built up of circular transactions ?

0 Answers  

---

low voltage distribution is done by a)3 phase 3 wire b)3 phase 4 wire c)single phase

3 Answers  

---