Answer Posted / lovy

Polarization index is an indirect method of testing which may mislead about healthiness of transformer insulation
so instead of pi , capacitance and tan delta should be measured for keeping a correct check on insulation

is oil viscosity affect on motor current?

2006

---

How do we arrive at selecting reactive capacitance value as 30% of h.p rating of motor?

1846

---

What is 100% protection of generator? Why 100% is not used but 95% is generally used?

1047

---

in a simple IDMT relay we use neutral point of ct for earth fault then what is the requirement of neutral ct and cbct?

2173

---

can anyone explain 11kV 3core cable megger,hi pot test procedure with connection details?

3282

---

what is the working process of over & under voltage relay.

2230

---

in conventional fan regulators how the current varies with speed?

2005

---

hi this is hema, r there any books in particular for the preparation of the APPSC-A.E.E(electrical), if so please mail me the names ... thank u .

1929

---

What will be in Mahagenco Trade Test Exam? I want to know the same.

3698

---

Explain few advantages of electric traction system?

1142

---

what is the responsibility of C license holder in industry?

9170

---

how external lighting design? please give examples?

1903

---

Why power factor should not be in leading (capacitive) mode of any load.

7048

---

Tell me about ur past electrical maintanence job

1885

---

how does directional relay work incase of ac ?

1520

---