Answer / baikunth

1. spring may not charged. control supply may missing.
breaker is not at service position.trip is activated or any
external interlock inhibiting the switching.
2. no
3. to save the breaker
4. for human safety.

Answer / shariq sultan

if u provide the drawing i shall guide u definatly. step by step

Answer / muhammadtahir

if u provide me the drawing of the panel i shall guide u in step by step

Answer / selvakumar.k

Spring may problem,phase terminal may burned,phases may short circuited,

why hv winding is not placed near to transformer core

4 Answers  

---

Which theory is used in the analysis of salient pole rotor synchronous machines? Who is credited for this developement? Could the same theory be used for cylindrical rotor synchronous machines?

1 Answers  

---

lorteny method

0 Answers  

---

why middle phase should used for earth fault and other phases used for over current in overcurrent and earth fault relay?

7 Answers   ABB, ONGC,

---

what is metering cum synchronizing panel and how it is used?

0 Answers   Wipro,

---

---

What is the difference between tie bus and bus coupler?

1 Answers  

---

Who is the first Bangladeshi Everest climber? Where is his home district?

0 Answers  

---

An active element is one which a. Supplies energy b. Absorbs energy c. Supplies energy and convert energy from one form to another

0 Answers  

---

which motor have relatively high power factor and what is reason for have high pf? 1.capacitor run motor 2.shaded pole motor 3.capacitor start motor 4.split phase motor

0 Answers  

---

Who are the manufacturer for Nitrogen based Fire Protectio/explosion prevention for Oil Filled Transformers? India and international both?

0 Answers  

---

how much speed will trawiling current

3 Answers   TCS,

---

1.where in India the maximum transmission voltage is operated? 2.what the methods are used to cool down the transformer?give the specific ratings of the transformer & specific cooling process. 3.how zero & negative sequence reactances are formed in a rotating machine when fault occur in the system?

2 Answers   IES,

---