What will Happened if the polarity of CT is changed?

Answer Posted / sanjay sharma

It is depend on type of scheme, in protection , if three phase ckt then reversal of 1 CT polarity relay will (if set value Reach), reversal of all three phases will not effect for normal protection (except to directional protection). In case of metering Ameter will not effect, but energy meter will not work,if single CT reverse in case of three phase, mode (import/export) will change.

Is This Answer Correct ?    6 Yes 2 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Can anybody please refer the best and simple book for about Protection relays and in detail of all its protection ?

1479


whats the existence of reactive power and when it arises?

1627


how much flux density of CRNO core

2328


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

1637


how to copy from plc ge fanuc versamax series,all input and output, adress, and printout.

2040






The shot circuit in any winding of transformer result? Explain

791


detailed procedure how we calculate cost for pcc m10 and rcc m20 including centering and labour excluding steel/ iron

2616


State thevenintheorem?

593


What is meant by reverse polarity and how it can be fixed?

741


HOW TO CALCULATE THE HEAT AND LOAD OF LT-SUBSTATION WHICH CONTAINS 2*1MVA TRANSFORMERS,LT-SWITCH BOARD,MLDB,ACB,BUSBAR,ETC,......?

1617


how point on wave controller works.

2074


HOW DOES THE ELECTRONIC ENERGY METER WORKS?

1614


IN MY SYSTEM THERE IS ONLY OVER CURRENT EARTH FAULT RELAY IS AVAILABLE. FOR THE UNBALANCE SENSING IS THERE ANY RELAY IS AVAILABLE? THE SAME CTs WHICH ARE USED FOR THE OVER CURRENT EARTH FAULT RELAY CAN USE FOR UNBALANCE ALSO?

3184


Starting Time of LT & HT Motor

1471


There is any especial requirement for motor to drive through with VFD?

2171