Answer Posted / j.prakash

after the load and running time is decided the battery bank
size can be calculates the first calculation is to divide
the laod in watts by 10 for 12 v systems or 20 for a 24v
system ....

resulting in the number of amps required from the batter
bank..

AN Example of this calculation is:

1.total watts=1000watts.
2.amps from 12v battery =1000/10=100amps DC.

FOR A 12V BATTERY 100AMPS DC*3H=300AMPS HOURS(AH)

how to find 5 kilo meter long under ground 33 kv cable fault location if IR VALUE shows 0.05 M ohm @5000 volt.and cable fault locator shows some time fault distance 3 kilo meter ,3.7 kilo meter and some time 1 kilo meter? now how to find the fault location that where is leakage. note--it is tested with 5000 kv megger and insulation resistance is 0.05 M ohm. and some time 0.03 M ohm comes.

2214

---

what is harmonics? what are the factors it will depend upon

2030

---

what is p.s impedance measurement test in earthing transformer?

2415

---

-What shall be short circuit current of LV switchgear for a 1000 kva, 11.415kv, 3 phase tranformer with 5% reactance.

2133

---

what is x'mer ,isolation x'mer & yltra-isolation x'mer?????

2482

---

How Diesel Generator start ?

2419

---

can any one tell me about the Extra low voltage systems?From where we give supply to these type of systems??

1921

---

What is quadrantal symmetry?

1653

---

placing earthing pit in pathway is correct or wrong??. placing earthing wireGI1/18 inside walls is correct or wrong?. explain!!!

2168

---

role of europe union in UK safety legistlation (electrical safety)

1772

---

hello friends..... any one have papers or any study materials?sail ,hpcl...?

1886

---

What are the types of instrument transformer?

1173

---

surge tank, hrc fuse, earthing transformer, firm power objective type

1639

---

Why it need to form a capcitor when it not been in use from three or two year. Plz describe it technically.

1935

---

why did youi choose this career?

2220

---