Answer / shivashankar

It will act as short circuit, bcoz the rate of change of
flux will induce voltage in sec,whereas in Dc there is no
such phenomenon ..R=V/I..if V=0 R=0/i ultimately R=0......It
nay tend the transformer to overheat ...

Answer / guest

Due to the high short circuit current (110KV/0 ohms) the
primary winding will burn..

Answer / adel

no voltage produced in secondry winding

Answer / vasudeva rao

according to the faraday emf is developed in the winding
when there is a rate of change of flux is present.
(E=dΦ/dt ) i.e time variant flux is present. but in d.c
current is constant i.e time invariant. here flux is
constant. so differentiation of constant is zero. i.e
dΦ/dt=0. i.e e=0.


it means winding gets serious short circuit.

Answer / mohammad saber

for any dc value the the transformer insulator will ichrist
because of the direct current ,and as we know the
transformer operation theory work on the the alternating
current generate the mutual between the transformer windings

Answer / prabhakar

since the primary winding is of thin guage with large no.
of turns as compared to its secondary winding i.e.,the
resistance of the primary winding will be more and so that
no more short circuit happens with the winding and
eventually no more secondary voltage appears at the
secondary.(as per the basic of transformer principle)

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TRAFO 1. WHY BREATHER IS USED. 2. WHY OIL GOES DOWN IN CONSERVATOR TANK. 3. WHY WE ARE TAKING OIL SAMPLE TAKING FROM BOTTOM OF TRANSFORMER. 4. HOW TO CHECK IR VALUE OF TRANSFORMER. 5. WHY OLTC HAVING BUCHHOLZ TRIP ONLY; WHY NO ALARM. 6. OFF LOAD TAP CHANGER OPERATION PROCEDURE. 7. TR. SHUTDOWN / ISOLATION PROCEDURE. 8. WHEN THREE TRS. IN PARALLEL, ONE TR. IS NOT SHARING THE LOAD – WHAT IS REASON AND WHAT YOU WILL DO. 9. WHY TR. HAS OLTC IN HV SIDE. 10. WHAT IS % IMPEDANCE. 11. WHY TR. RATING IN MVA. 12. WHAT IS VECTOR GROUP IN TR. 13. CONDITION FOR PARALLEL OPERATION OF TRS. 14. WHAT IS TERTIARY WINDING. WHERE IT WILL BE. 15. IF TR. TRIP ON BUCHHOLZ OR TAP CHANGER RELAY, WHAT YOU WILL DO. 16. DIFFERENCE BETWEEN OIL TEMP. AND WINDING TEMP. PROTECTION 17. HOW WINDING TEMP. IS MEASURED IN CAST RESIN TR. 18. DIFFERENT TYPES OF FAULTS IN TR. Trafo - Page-1 of 2 19. WHAT HAPPENS WHEN TR. CHARGED FROM LV. 20. WHAT WILL YOU DO IF MEGGER READING SHOWS ZERO BETWEEN LV WINDING AND EARTH. 21. CAN WE INTERCHANGE BUCHHOLZ RELAY OF MAIN TANK AND OLTC TANK. 22. IF THE LINE BETWEEN BREATHER AND CONSERVATOR TANK 23. LOCKED, WHAT WILL HAPPEN DURING LOAD CYCLE. 24. WHAT IS THE FUNCTION OF OIL SEAL IN BREATHER. 25. WHAT ARE LOCATIONS FOR BUCHHOLZ RELAY FIXED IN POWER TR. 26. WHAT ARE CHECKS IN POWER TR. DURING MAINTENANCE. 27. WHAT IS IMPORTANT WHEN WE CHECK OLTC OPERATION DURING MAINTENANCE. Trafo - Page 2 of 2

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