Interested to Buy Any Domain ? << Click Here >> for more details...
How can calculate ups battery back up time?
- 25 Answers
- 168689 Views
- Cisco, Cooper, Pronet, Wipro, I also Faced
- E-Mail Answers
Answer Posted / guest
As a thump rule,if we need 1 hrs backup from the 1 KVA UPS
12V/130AH is Required,For Example,10 KVA ON-Line
UPS,Battery-12V/65AH,26 nos.
BAck-up Time=Ah of the Battery*Total no of the
Battery/Output KVA*130
BAck-up Time=65*26/10*130
BAck-up Time=1.3
BAck-up Time=60~70 Mins(Approx)
| Is This Answer Correct ? | 219 Yes | 147 No |
Post New Answer View All Answers
what are the main faults that occur in stabilizers? How they corrected and resolved ? Types of stabilizers ?
how to find impedance , mutual indatnce in transmission lines
why the NGR (neutral grounding resistor) always OFF during DG off?
ASTM D 3455 - Standard Test Methods for Compatibility of Construction Material with Electrical Insulating Oil of Petroleum Origin has been used for Testing Transformer Oils with a product placed in it. Aged Control Oil has a Power Factor of 0.032% at 100°C. Aged Oil with a Test component has a Power Factor of 0.093% at 100°. Is this increase acceptable? If not why? How much increase is acceptable?
what will happens if one phase is missing for 33/11kv power transfomer and why?
describe the fully control circuit diagram of ac drives
Differnce between negative Pahse SequenceFunction and unbalance Function?
how harmonics generated in induction furnance? how minimise it?
1.What is captive power plant? 2.What is national grid?Give brief idea.
The electromagnetic torque developed is proportional to what in a D.C series motor?
How to design a Unit auxiliary transformer for a power house having a unit of 65 MW and Generating voltage of 11 KV and Secondary voltage of 433V
Why cables and busbar both needed in LT Panels?
If the rated speed of a d.c. Shunt motor is1440 r.p.m, which method of speed control would you suggested to obtain a speed of 1500 r.p.m?
Explain and give me an example of a time when you had to explain some new procedures to your co-workers for quality service delivery, how did you go about it?
WHAT IS ELECTRICAL MAINTAINTENCE ?
