Answer / k.prakashchandra

If other 2 phases are OK ,it may be due to open circuit in
that phase.If other 2 phases show 50% ,it may be due to one
phase missing in the primary of substation power transformer

Answer / ambai algates

if 1 phase open the unbalance current is flow through
neutral , so its exit the setting bkr trip .if there no
load you got 230v only in phase to open phase

Answer / akash`

check your high tension line d.o.if three d.o. is ok then
substation problem not coming one phase means single phasing
problem call it

what about the input current fan when regulator regulates to speed low?

1 Answers  

---

What current flows in the transformer primary when its secondary is open?

0 Answers  

---

what is the effect of leading power factor on Power transformers in existing in major power utility

2 Answers  

---

technically, what is the reason behind starting the motor star the delta connection .. and what other ways to do this rather than using " star-delta transformer"

0 Answers   Wipro,

---

How to calculate Temp from Resister from PT100 equation,

0 Answers  

---

---

why make protection 85% of winding?

1 Answers  

---

why occ characteristics of generator is also called as magnatization characteristics

1 Answers  

---

What is meant by (2 x 185) AYFY cable

3 Answers   ONGC,

---

How to calculate u.p.s load parsentage plz give me formula

1 Answers  

---

how to calculate the capacity of the AC motor

1 Answers   TATA,

---

if name plate detals of a motor or any other is missing then how to find it

1 Answers  

---

what happens to the speed of a DC series motor when series field winding is removed?

8 Answers  

---