Answer / rmohanraj

11KV/110V & 33KV/110V ARE INSTRUMENTS TRANSFORMERS. IT USED
FOR METERING PURPOSE FROM HV SIDE. FOR METERING INSTRUMENTS
ARE SUITABLE FOR 110V 230V AND 440V ONLY RANGES AVAILABLE, SO
WE SELECT 110V SEC. VOLTAGE FOR 11KV OR 33KV SYSTEM.

What are the causes of unbalanced current on 34.5kv feeder Ia=0.05,Ib= 0.25, Ic=0.15 and In=0.27 prior to tripping current are balance?

0 Answers  

---

If 100 KAV USP dedicated earth got disconnect / Cut. What will happen at load.

0 Answers  

---

If the supply voltage is same (say 440V) whether a system designed for 60 Hz frequency will work with 50 Hz frequency or not , if so pl. give clarification.

11 Answers   ABB,

---

Enlist four components of electrive drives.

0 Answers  

---

What is the unit of inertia constant of rotating machines? Which has more inertia constant between turboalternator and hydroaltermanor and why?

2 Answers  

---

What is the normal value of delta in rotor angle stability or transient stability? Why it selected so?

1 Answers  

---

block diagram of 2 ups system connected in hot stand by mode?

0 Answers  

---

Why Transformer Neutral having one earth pit ( more earth electrode resistance) whereas body have many earth pit ( less earth electrode resistance)?

0 Answers   OPS,

---

A circuit breaker on detecting fault will a. Open b. Close c. Open and trigger the alarm

2 Answers  

---

suppose if oil in transformer is not used than what constructional change you will do,for insulation and cooling?

2 Answers   ABB,

---

what is Distance protection & how did it work

2 Answers  

---

What are the function of different components of servo motor?

0 Answers   BARC, Parle,

---