what is mean by PIR in circuitbreaker and give me detail of that?

0 Answers  

---

How much amperes needed for starting of 4HP motor?

1 Answers   CM Smith Sons,

---

How does frequency affect KVA rating of a transformer? If a 500 kva, 400 v, 60 hz t/f is to be operated on 50 hz frequency then how will its KVA rating change? a-increase b-decrease c-remains same Also explain why do u think like that.

8 Answers  

---

What is the actual calculation for transformer short circuit test?.

0 Answers  

---

What is meant by locking of rotor in synchronous motor? Explain me locking in detail?

3 Answers  

---

---

How to know vacuum in vacuum cylinder of breaker in working condition

0 Answers  

---

What is the minimum distance to be maintained in between HT panel and LT panel and Instrument panel as per IEC and NEC standards?

0 Answers  

---

Brief use of isolation transformer & how it works.

1 Answers  

---

Why only 1ph,2ph,3ph supplies are universally used?? Why not 4ph or 5ph??

4 Answers  

---

how to work exciter in 10 MW alternator?

2 Answers  

---

What is diffrence bitween electrical and electronics ?

4 Answers  

---

What is the role of a Production Engg in a Industry?????

1 Answers  

---