What is the Difference Between MCCB & ACB & VCB
Answer Posted / sendô
VCBs are used primarily for medium voltage circuits (11kV
in UK), due to their better arc quenching abilities (these
high voltages in ACBs or MCCBs would cause an arc between
the terminals and render the breaker useless).
The fundamental differences between ACBs and MCCBs are.
1. MCCBs cost far less than ACBs
2. MCCBs are better at lower interrupt currents (below
630/800A), ACBs are better at higher currents (800A and
above)
3. ACBs are a lot bigger and take up large sections of
panel that you might be able to fit 3 or 4 smaller MCCBs
into.
4. The main advantage is ACBs perform better under high
current short circuits, and will normally withstand for
long enough to allow a downstream device to open and clear
the fault, thus localising the short circuit trip.
5. ACBs are more easily serviced (particularly withdrawable
type).
Is This Answer Correct ? | 104 Yes | 15 No |
Post New Answer View All Answers
What is non-minimum phase transfer function?
how can get electrical c licence.now i am working in spining mill , transformer capacity 2750KVA. SANCTION DEMAND 2250KVA. PLEASE ADVISE ME . MY CONTACT NO 09944226823
what is the basic construction diffrance between servo motor ans sqiralcage induction motor
According to IEC60034-14, When the vibration monitoring system required for motor Bearing. above which KW, it is required? and for what type of bearing the vibration probe is provided.
how to size H.T & L.T Panel ?
What are the basic & Majour problems in UPS ?
How many types of oil using in H/T & L/T Oil Circuit Breakers. need Explenation ?
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
Draw a SLD of DG distribution up to main LT panel?
Can a generator runs after getting 1st stator earth fault.
An automatic water heater is an example of which type of control system?
i have to install a HT panel, what components, I have to use in this and what will the diagram of that diagram,please tell me each and everything.
how hazordious area is classified at an oil & gas plant and categorise suitable class of electric equipment in that area like induction motors, LCS, Lighting Fixtures Fluerescent/Flood lights Mercury& sodium lights, J.Bs, Power Cables etc
how can we find thae value of capacitor for single phase motor. what is difference between starting capacitor and running capacitor.
What is sensitivity of a measurement?