Answer / amit khamesra

Conventionally only PS class CT shall be used for unit
protections. But now a days, with the use of miro processor
based relays having facility of low impedance or biased
differential protection, 5P20 may be used as biasing in the
relay takes care of the unmatched characteristics of the
both side Cts.

Answer / avdhesh

Class 5p20 CT is a protection class CT which is used for
normal protections. For differential protection you must
use class PS CT.

Answer / persistence

yes 5P20 class CT can be used for differential
protection,In our industry they have been used for
transformer differential protection,transformer being 10 mva
and for bus differential protn. class PS has been used.

Answer / dharmaraj

For diff.protn you must use ps(or) px class CT.

Answer / dheena hitech

For diff protection we should be use PS or PX class Because
of yjat one ine is spl. class for diff and Dist protection

Why can't we take NO LOAD TRIAL of motors having V1 mounting??

0 Answers  

---

WHAT IS TANK CKT.?

4 Answers  

---

Why the earth cable have current 1A - 2A , it is safety for Electrical system or earth cable should be zero amps ? how to troubleshoot?

0 Answers  

---

what is pressure relief valve?where it is used????

4 Answers   Mecon,

---

why always electric field is linked with magnetic field???

2 Answers   Bhushan Power Steel, NTPC, Tata Steel Limited,

---

---

1. for eg, capacitor is used for many purposes(it act as filter, oscillator, bypass capacitor, memory storage etc...) 2. Please tell me some example circuits for different uses of capacitor( whenever and whereever and however we used capacitor as a filter, oscillator tuning etc..) 3. similarly for inductor and resistors(it act as what?) and when and how we want to act as like that?, and how we can used these components depends upon our requirments with example circuits and explanation? design to act as these components depends

0 Answers  

---

Tell me harmfull effects of over voltage,under voltage,spike,surge,transient & noise.

1 Answers  

---

define reactive power?

3 Answers   Alstom, TATA, TCS,

---

what is the difference between line voltage meter and relays

4 Answers   TCS,

---

How to design pavement quality concrete by using C.R.C.P Method

0 Answers   L&T,

---

Clearly Define Active,Reactive,Apparant power.Which applications used which power above metioned power?

9 Answers   Summit Power,

---

what is the use of terminals in transformer ?

1 Answers   Core Solutions, Honeywell,

---