I have carried out wiring for lighting in a shed in
Industrial area which contains Metal halide lamps & have
balanced in 3ph.Now when we put all the lines on in the
daytime the current taken at 3phases at MCB comes to be
equal i.e.28,29,28Amps respectively but in the night time
i.e between 7p.m.to 11p.m. at the same MCb the current is
52,59,62Amp, though I have fit 63A MCB it is tripping in
the above period.What may be the reason.?
Note: This industry is located in industrial area where
majority of steel ingot manufacturing plants are there.
Whether this may be due to harmonic? what should I do to
overcome above problem.pl suggest urgently.
- 4 Answers
- 5318 Views
- I also Faced
- E-Mail Answers
Answer Posted / h r jadhav
pl check the maloperation of mcb or correct rating of mcb/
secondly the power factor may be very low of the metal hal
lamps during day time that may be compenseted by bus
capacitors and which are disconnected at the time of no
work. there by increasing current and mcb get tripped/ pl
use energy efficient electronics ballast.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
what is the question paper model for section engineer in RRB
WHAT IS SUBSTATION & ACCORDING TO VOLTAGE HT,EHT SUBSTATION EXPLAIN IT
what is high and low cut off voltage of BB and DG at SPS????????
what is the principle of operation of CFL ??
what happens if dc supply is given and the remedies for it.
Graphs of measuring power and speed on dc motor
What are IP protections used for electrical panels, JB, equipments installed in explosive zones like Petrochemicals, Oil & gas
WHAT IS THE PARTIAL DISCHARGE TEST?
what is the Connected Load (kW) or Contract Demand (kVA)of mahindra nasik plant??
When we have earthing mesh or underground earthing network in industrial plants, weather we have NT-S or NT-C-S kind of earthing system, so eventually weather we must use 4 or 5 wire in 400 volt level (For example 3×150+70 mm2 or 5×150 mm2) in this connection I would like to know exactly the paragraph of IEC or IEEE number
What will happen if i used 11KV earth ht kit to 11 KV / 11 KV cable termination?
what is load despatching
How to know the Max. current caring capacity of the cable by its size ?
I want to make street light with solar system ... What may I do for procedure and how much of estimation for each material ... If any one knows guide me and inform this id : aravindd7@gmail.com
i have install 750 kva distribution transformer at my site and want to do neutral earthing. what calculations should i follow to determine earthing conductor material and size?
