Answer / maddoxx

neutral in sigle phase line is the return path which is normally(off ckt) at 0 v.grounding is done for protection and current flows only during fault.Grounding is done basically on the non current carrying part of the device or system so if there is failure of insulation in motor or device the current also flows in chesis of device. so if we do grounding it flows impedance path) to ground(earth).and thereby protecting device from higher current.
in 3 phase line neutral has no current in balanced cond'n.But has in unbalanced.so this extra current can be bypass by connecting neutral to ground or to the supply neutral(which is also grounded).
"SO NEUTRAL IS A RETURN PATH(1 PHASE) AND GROUNDING IS A BYPASS PATH IN FAULT CONDITION ONLY"

How to calculate or testing the KW in generator

1 Answers  

---

WHATIS TIME CONSTANT? WHATIS ITS SIGNIFICANCE? ILLUSTRATE THROUGH EXAMLES.

0 Answers  

---

given data are load current & power factor cable core size? plz any one update the calculation formula

0 Answers  

---

Dear all, i completed M.E(Power Electronics & Drives) 2011 passed out having 78% so i need job in core side but i don't know how can i receive the calls from electrical companies and i uploaded my CV in naukri, times jobs etc.. In that iam not recieved any mails from good companies so give me best procedure plzzzzzzzzzzzzzzzzzzzzzzzz..... Thanks, K.Linga Reddy Email-id:-lingareddykmthm@gmail.com Ph no:-08015402078

1 Answers  

---

Differentiate AC and Dc resistance

0 Answers  

---

---

What happens if 25 Hz frequency is applied for 400/200,50 Hz single phase Transformer.Will Voltage increase ?

2 Answers   Bhel, Dawlance, IBM,

---

As we know multiplicity factor derivation equation is as below MF = main c t ratio / main p t ratio * meter c t ratio / meter p t ratio * meter dial constant Where in digital meters for HT kwh import export now a days meter constant are calibrated already which is 1 So my question is For HT 11kv 110 v line values are as below Main c t and p t ratio are 11000 v and 110 v and 20/5 means 20 amp and 5 amp Now meter values are 11000/√3/110√3 and primary and secondary amp are displayed as -/5 amp on kwh meter so what will be the MF for this meter ?

1 Answers   NEPC,

---

what is means of CLASS in current transformer name plate?

3 Answers  

---

What is a diode?

0 Answers  

---

We wish to test 60 Hz systems from a 50 Hz supply. To acheive frequency conversion, we use a VFD. The VFD powers 40 kVA transformer, which has motor and non-motor loads on it. Will the transformer work?

2 Answers   Suzlon,

---

1.why should we connect the measuring instruments in l.v side in short circuit test of a transformer? 2.why the power factor is less in open circuit test of a transformer?

0 Answers  

---

what are the C&D CHECK OF DG set

1 Answers   HCL,

---