Answer Posted / sagar khandey (r.c.e.t, bhila

1.INSULATING OIL IS USED IN x-MER.
2.The oil should be greater than 100M Ohms resistance.
3.we can't define its BDV value, without knowing its rating.
for Example:
MINIMUM BDV in KV RATING in KV
23 KV <69
26KV <69 KV-288KV

26 KV >388KV

Generation of voltage for each phase are same of a turbogenerator.Although the short circuit current flow when two phase of turbogenerator are shorted(where current can't flow without potential difference),why?

2051

---

can we conduct the swineburne's test on a dc series motor? why?

2090

---

The series field winding has low resistance while the shunt field winding has high resistance. Why?

1668

---

what is formula for zero phase sequence of nuetal earthing transformer of 6.6 kv

2230

---

Define coil span?

1008

---

How does a transformer contribute towards the widespread popularity of ac system over dc?

1054

---

why should the primary of transformer be connected in delta in a heat run test?

1923

---

What is BusBar integrity test and how it is conducted?

2156

---

What is Fire Panel ? How it works ?

2004

---

Which type of a.c motor is used in the fan (ceiling fan, exhaust fan, pedestal fan, bracket fan etc) which are find in the houses ?

982

---

What is called limb of a transformer?

996

---

What is the Temperature to be set in Thermostat provided in Marshalling box of the Transformer / Motor.

2969

---

Which motor connection is preferable star-delta or delta-star?

1022

---

What is error of a measurement?

1152

---

Why line VTG = √3 phase VTG in star? How?

1533

---