Answer / kiran kumar

the effects of armature flux on the distribution of main field flux is called armature reaction

Answer / rizwankhan

The action of armature flux on the main flux is called as armature reaction.

Answer / bob

armature indused flux cause influance on field flux so the
Magnetic Neutral axis will be shifted and spark appear on
carbon brashes

Answer / aday9

Armature reaction is the interaction between flux set-up by the current carrying armature conductors with the main field flux.The entire energy conversions from mechanical to electrical in the case of generator, and electrical to mechanical in the case of motors takes place only due to this interaction.

Answer / rolly

weakening and distorting main field flux by the flux
produced by armatures is known as armature reactions.it
will produce problems in commutation.

Answer / engr. irfan jamil

If the magnetic field windings of a DC machine are
connected to a power supply and the rotor of the machine is
turned by an external source of mechanical power then a
voltage will be induced in the conductors of the rotor. If
a load is connected to the terminals of the machine a
current will flow in the armature (rotor) windings. This
current will produce a magnetic field of its own , which
will distort the original magnetic field from the machine's
poles. This distortion of the flux in a machine as the load
is increased is called ARMATURE REACTION. This armature
reaction causes two main problems in DC machines: neutral-
plane shift and flux weakening.

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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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