A current transformer having primary turns of 2400 and secondary turns of 20 is connected to...

  

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A current transformer having primary turns of 2400 and secondary turns of 20 is connected to a source of 400 V and an impedance of 4410° n. A CT has a primary winding induced voltage of 390 V and a secondary impedance of 2425° N. Assume no load current of CT is zero. a) Draw equivalent circuit diagram in view of the above statement. b) Calculate burden of CT. Question No. 2: (5) Marks Explain with reason whether open circuit condition is dangerous for a current transformer or a short circuit condition? Question No. 3: (7) Marks A moving-iron instrument has dL = 702 mH with a full scale deflection of 90 degrees at 3 A. Estimate de 02 +1 A where 0 is the 4 the angular deflection of the pointer for a square of the current as 30 defelection in radians from zero position. A current transformer having primary turns of 2400 and secondary turns of 20 is connected to a source of 400 V and an impedance of 4410° n. A CT has a primary winding induced voltage of 390 V and a secondary impedance of 2425° N. Assume no load current of CT is zero. a) Draw equivalent circuit diagram in view of the above statement. b) Calculate burden of CT. Question No. 2: (5) Marks Explain with reason whether open circuit condition is dangerous for a current transformer or a short circuit condition? Question No. 3: (7) Marks A moving-iron instrument has dL = 702 mH with a full scale deflection of 90 degrees at 3 A. Estimate de 02 +1 A where 0 is the 4 the angular deflection of the pointer for a square of the current as 30 defelection in radians from zero position.