What should be the minimum and maximum ohmic value for earthing?

2 Answers  

---

how the transformer stables out zone faults? Because we use non directional O/C relays .Is there any special considerations are taking into account to overtake this?

1 Answers  

---

i have some screw comprressor with 630kw power,i have established them with simple star to delta circuit,by the way there is so much inertia when the screw comprressors start, can you offer me contactors power with 400vac or any cataluge to choose the contactors

0 Answers  

---

advantage and disadvantage of team work?

0 Answers   Ethio Telecom,

---

what are the assumptions made in swineburne's test?

0 Answers  

---

how electronic energy meter works?

12 Answers  

---

when i am going to take trail on a 3ph sq.i/m motor 5.5kw, i observed that RPM of the motor is very low as compared to the rated RPM and also it rotates in clockwise in first ON command,and anticlock wise in second ON command. finally i observed that on phase is no available . but iam not clear about, why the motor is rotates in both directions without any phase interchanging.pls answer to my question.

1 Answers  

---

Motor also having losses, we call KW rating. In transformer and generator having losses but we call KVA Rating why?

9 Answers  

---

what is phase to phase fault? what is line to line fault?

2 Answers   Phoenix Technologies,

---

what is the difference between Earthing,Grounding and neutral?

3 Answers   Biocon, Tata Steel Limited,

---

what is b checks and m checks in diesel generator maintenance?

1 Answers  

---

From what on-site components does the HT panel monitoring the bus-bars in a 11kV system take inputs?

0 Answers  

---