Interested to Buy Any Domain ? << Click Here >> for more details...
Why the rating of the HT breakers are in 1250 Amp, while
the load on the breaker is around 50 Amp. ?
- 9 Answers
- 24568 Views
- Wipro, I also Faced
- E-Mail Answers
Answer Posted / rahul
bcoz CBs are supposed to interrupt fault current which can
be several times larger than the continous load current.
( for further clarification see CB specifications)
| Is This Answer Correct ? | 21 Yes | 11 No |
Post New Answer View All Answers
what are symmetrical and non symmetrical components in electrical installation.
why ht motors are star connected?
Is there any rule to select the voltage of motor based on KW rating? What is the rating above which lt motor becomes the HT motor?.
When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<
What is the previous name of Cox's Bazar
I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?
How to know th details about an electrical Drawing ? Please mention the easy method.
In EHV transmission line a neutral grounding reactor is often placed at neutral point of shunt reactors. What is the recommended protection for this neutral grounding reactor? Should I use a fast closing switch to bypass neutral grounding reactor when this protection operates?
there is an alternator 480 k.w, 400v,50hz, 4-wire running on load having leakage alternator body earthed current 38 A. is it within acceptable limit? if yes then give reference if no then how to bring within specified limit
how we decide wire gauge for ac or dc coil and what is the basic diff. B/w these two coil?
what is earthing.how we make it,describe briefly.
HOW DOES THE ELECTRONIC ENERGY METER WORKS?
I want to know Electrical Circuit?
What is the principal of motor?
SUTIABLE FOR ohm's law super conductor
