Answer / k.prakashchandra

The electronic relays do not have heavy duty contacts and they are usually self reset. Tripping relay is required to take high trip currents and they are to be reset . Otherwise the contacts of e- relays will burn out and breaker may close without clearing fault . In addition , a back up EM relay may be required

what is the solution for meger test failed the MV cable?

1 Answers  

---

A three phase transformer 460v primary 220v secondary (three phase four wire system.) Why did we get 460 volts across the neutral on the secondary side?

3 Answers  

---

difference between isolator and circuit breaker?????

7 Answers   Enercon,

---

what is legal process of dg set?

0 Answers   Dutron Polymers,

---

orifice sizing how done, checking & selection

0 Answers  

---

How to Preparation of online test

0 Answers  

---

difference between dol and rdol startors?

2 Answers   Vijai Electricals,

---

A motor works on 30kw.it is working on 440volts.How much amper will be Required?

7 Answers  

---

If the feeder rating is 7.5 kw or 10 HP star-delta feeder, MCCB is taken as 63 a, contactors-32 a, how much will be the OLR rating or which range OLR should be considered when we concern about type-2 coordination?

0 Answers  

---

what is the roll of power factor in induction motor.

3 Answers   Hindalco,

---

I find that underground strip-armoiured,4core,LT PVC cables in an earthed power distribution sytem are occasionly found in charred condition-with no trace of it except ash. Is this because of no proper earth connection/continuity (giving rising to high armour resistance)in the joint enroute or because of insufficient capability (again due to high armour resistance)of cable-armour to carry fault current or due to neglected /unprotected overloading of the cable or due to high armour currents caused by power thefts where only phase(s) are unauthorisely tapped & at the point of poer consumption earth terminal is established by burring underground a not so good earthing rod (or using an underground water pipe for the purpose)

1 Answers  

---

What is HT? And specify the range of voltage?

5 Answers   HSL,

---