why dc is used in control circuits for MV & LV switchgeras instead of ac

0 Answers  

---

Why 66KV is step down to 11KV and then 433v, not directly 66KV to 433v ?

2 Answers  

---

what will happen when a bulb s connected btwn two phases of a three phase delta connected source?

6 Answers  

---

What will be the diameter of pipe between conservation tank and transformer

0 Answers   JLL,

---

Which UPS (inverter) is better and why ? 12 V inverter and 24 V (two 12 V batteries in series) inverter which is better ......... which has the longer backup which has the greater charging time which has the greater discharging time thank you

2 Answers  

---

What is the different between earthing & Neutal

3 Answers  

---

Essential condition for parallel operation of two single phase transformer is that they should have same A polarity B kVA rating C voltage ratio D % impedance

1 Answers   wbsedcl,

---

How to calculate earth wire load by formula

0 Answers   Caparo,

---

When we change the tap position of 10MVA transformer it suddenly tripped with Out of step indication and also with Static differential relay indication, Transformer Bucholz relay indn and Low oil level indication. Before 1 week the same problem occured by changing the tap position. but at that time only oltc bucholz relay activated. After testing the TxR Relay team & PET team cant find any solid reason. The values are ok also. So plz answer wat's the reason for this incident? anybody plz help.

3 Answers  

---

if harmonics is generates on the secondary side of transformer then why we put LC ckt on prim side?(i m talking abt rectiformer transformer)

0 Answers  

---

what is the internal fuction of a ceiling fan?

2 Answers  

---

What is the difference between electronic regulator and ordinary electrical rheostat regulator for fans?

0 Answers  

---