What is pd controller?

0 Answers  

---

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  

---

I am shobana from Chennai. I am having my personal interview on 19th Dec at Chennai.kindly mail me the questions to mail id shobana.shanthi@gmail.com

0 Answers   Avalon, KK Capital,

---

why we use isolation transformer?

2 Answers   Godrej,

---

How to checked frequency drive output voltages?

0 Answers  

---

How do we arrive at selecting reactive capacitance value as 30% of h.p rating of motor?

0 Answers  

---

what is transient enclosure vltage , very fast transients, very fast transient over voltages

0 Answers  

---

if dc is better then ac...then why we are perfering ac over dc?eg:at home?

2 Answers  

---

what is stper motor

0 Answers   Bhel, WAPDA Water and Power Development Authority,

---

I want definition for ABT Meter (Availability Based tariff) ?

0 Answers   Radha Regent Hotels,

---

If ct ratio is 250/1 and mtr is of 5 amp, what will be mf?

1 Answers  

---

how to identyfy cable sizes?

4 Answers   IAF, Mylan,

---