Answer / mihir

ONAN-OIL NATURAL AIR NATURAL
ONAF- oil natural air forced
ofaf-oil forced air forced

Answer / k.prakashchandra

OD - oil direct is common.OFD probably means -Oil forced
direct.

what is frequency transformer?

2 Answers  

---

HOW DOES THE PERCENTAGE DIFFERENTIAL PROTECTION WORK IN POWER TRANSFORMER

1 Answers  

---

What is the difference between an insulator and a dielectric?

2 Answers  

---

Kindly give the brief explanations for checking 12.5 kvar 440V, 25 KVAR 440V, 12.5KVAR 690V, 25 KVAR 690V capacitors microfarad values. what is the microfarad values for the above four type of capacitors, and give the formula explanations briefly. I know F-50HZ, voltage, and capacitor.

1 Answers  

---

I did oil BDV test of 1600 KVA trafo 20KV/400V as per IEC 156. Result is 1) 58 KV 2) 58 KV 3)40 KV 4) 50 KV 5) 58 KV 6) 18 KV. Avr is 47 KV. Can we say oil is still ok even in the 6th test BDV is 18 KV ?

1 Answers  

---

how we can improve P.F. by using capacitors ?

22 Answers  

---

what is VFD and where is use of it

5 Answers  

---

What does a Bode plot tell you?

0 Answers   GE,

---

Difference between drift current and diffusion current?

0 Answers  

---

Type of motor stater detail and working detail

0 Answers  

---

explain how hunting can be reduced in an alternators?

3 Answers  

---

what is the difference between c power and U power acb breaker

0 Answers   Radisson Blu,

---