11kv/0.433kv, 2 mva , transformer , for protection and
metering how many CT/PT are required?

Answer Posted / shailesh taware

1 CT WITH 3 CORE
1st CORE FOR O/C & E/F PROTECTION
2nd CORE FOR METERING WITH INSULATION CLASS 0.5
3rd CORE FOR DIFFERENTIAL PROTECTION
1 PT WITH 2 CORE
1st CORE FORE O/C & E/F PROTECTION
2nd CORE FORE METERING

Is This Answer Correct ?    10 Yes 3 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Please sent me some previous year question papers of BSNL-JTO telecom and RRB in ELectrical Engineering to varshashahi@yahoo.com

1565


How to calculate the time setting for star connection in star delta starter? For example 10KW 3PH Induction motor.

2158


what is transient voltage?

1797


how much GROUND & NEUTRAL VOLT maintain in data center.

1538


This is urgent!! What is a Thyristor-based 3-ways selector switch with Zero crossing control? how does it operate and where is it mostly found in a system?

1579






May I know how much values to be set for earth fault, over current and short circuit values at 11kv side? I have 11kv van 1250amps rating. Present it's taking load 80amps?

1026


What is the ratio of Booster transformer?

1653


My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

1450


What is the rate of WCT on the Electrical Contracts comprising of DG Sets and Civil Works in Delhi ?

1629


You are of electrical field and you are going for software? Why

1855


What are the properties of a resistor?

635


What is power distribution criteria for converting single phase unbalanced residential load to 3 phase star connected balance system. Does total KW converted to 3 Phase. Means Divided by root 3.

1846


what is the string efficiency

4487


what kind of technical test that i need to learn because i have an interview tomorrow.. please someone help me..

1490


where was current transformer protection units used and why??

1547