In a 3 phase 4-wire system. For a 3.5 core cable if all loads are single phase and balanced, what will be neutral current? will it be sum of all phase currents? Or it will be zero? And if loads are unbalanced what will be neutral current?1182
explain the functions of main isolation switches
please I wont know how to calculate the vector group for power transformer ZNyn11 best regard.1191
Any formula to calculate neutral current in 3 phase 4 wire system1 2033
What are IP protections used for electrical panels, JB, equipments installed in explosive zones like Petrochemicals, Oil & gas1121
In my 3 phase 4 wire electrical system N to earth voltage is 0.08 is it ok What is standard for it ?1 1468
What are the difference between normal application Transformer and Solar application Transformer?1172
Instrument connected to a single phase supply1167
What is the safe limit of voltage between earth and neutral in india.2 2689
What is the possible cause for failure of lightning arrestors in outdoor substation under normal condition1180
How will be the single line diagram of series trip HT breaker? how it works?
Please explain, how to test vector group of tranformer(Delta y1) . Thank
Draw the vector diagramme for Asynchronous Induction Generator at noload,half load and fullload.
How to calculate or formula to calculate rhe power in 2 phase system ??
H.t motor 6600 volt to same motor lt supply 440volt supply applyed to h.t motor to effect....
how to determine the inrush current of a transformer
how solar power plant energy meter multiplication factor
Explain forward resistance, static resistance and dynamic resistance of a pn junction diode.
how to design step down 12 V, 1mA small transformer from 220 V AC? Because according to VI relation and power transfer it results bulky...
how the B-H loop obtain under the static condition
Why sometime AVR and sometime Booster coil is used in Alternator? what is the diferance between AVR & Booster coil due to which they are selected
What are the ratings of VCB, MCB, MCCB, SF6, ACB, and OCB?
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
what is RNG in the DG synchronizing by PLC?
what is apparent poewr, reactive power, & active power?