Answer / ashish patil

Preclose means breaker in off condition it supervise the trip coil & trip ckt is healthy.
& Postclose means It supervise When breaker is ON.

Answer / k.prakashchandra

It will supervise the trip circuit before and after closing
the breaker

We know no of electron and proton in atom but how many Neutron are thire in an atom ?

1 Answers   Power Grid,

---

A genarator is connected through a 20MVA ,13.8/138 KV stepdown transformer to a transmission line. at the reciving end of the line a load is supplied through a step down transformer of 10MVA,138/69 KV rating .A 0.72 PU load evaluated on load side transformer ratings as base values ,is supplied from the above system for system base values of 10 MVA and 69 KV in load circuit the value of the load in generator circuit will be ...........

1 Answers  

---

my question is Megger of cable insulation or swgr board meggerring some values in one day 50mohms,some other day checking different values(20Mohms). this tell that some person tell that that values ok. how to identify the megger value is correct. pls tell me the answer.

2 Answers  

---

How to parallel a alternator without using synchro scope or lamp methods

1 Answers   Ofer,

---

HOW MANY TYPES OF FUSE?

0 Answers  

---

why capacitor offer reactance to alternating current?

1 Answers   Electrical,

---

Leading power factor means what? what is the power factor value while in power factor is leading? is power factor greater than one? In some cases i heard pf 0.8 leading then what about 0.8 lagging?

1 Answers   Rockfort Engineering,

---

what is the difference between thyristor & IGBT?

2 Answers  

---

WHAT IS SITTING AMPS IN OVER-LOAD RELAY FOR 1PH OR 3PH MOTORS?IF ITS NAME PLATE GIVEN MAX AMPS 10AMPS?

0 Answers  

---

what is single turn and multiturn encoder ? Can single turn encoder be used to show rpm of a motor(on shaft) ? Plz explain in brief .abanirout@gmail.com

1 Answers  

---

in cvt,there are two windings,1a,1n and 2a,2n.in my one project i use only one winding i.e.1a,1n. the other winding is not in use, so i connect it in open delta and want to close it by ibsertibg thermal resistor. the output of cvt is 132kv/115/sqrt3. plesae tell me exact value of resistor, so i may close it to avoid the resonance phenomenin. send me answer on this email adress please. aetcon-po@aetcon.com

0 Answers  

---

why various test are performed on electrical panels & power cables before commissioning on site & what are these test???

0 Answers   Lavasa,

---