Interested to Buy Any Domain ? << Click Here >> for more details...
My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula.
formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec.
Sp = RT( I x I x t) / K
Where Sp – is the cross sectional area of bus bar in millimeters.
I - is the value of AC fault current.
t - is the operating time of disconnecting device in seconds.
K – is the factor depending on the material of the conductor, insulation and initial and final temperature.
Value of ‘k’ for copper is 143.
- 0 Answers
- 1870 Views
- Premier, I also Faced
- E-Mail Answers
No Answer is Posted For this Question
Be the First to Post Answer
if in 3-phase system voltage=440V,frequency=60Hz, current=400A. then if it is single phase then current=? and if it is single phasing then current=?
What is grid collapse? what is the reason for it?
what is Electrical BMS
why we use salt for earthing?
In single core cable, Why non-magnetic material is used??
formula for calculation of switchgears(i.e. contactor, fuse, cb, relay etc.), if load current is given?
How many size of cable required for a 300m long and 30kw inductive lode
I have doubt that the supply HZ (very low or high than rated ) may affect the power factor. is it true. ?
Define availability (operational)?
what is the difference between the following 2 situations ? 1)Line & Neutral=240V Line & Earth=230V Neutral & Earth=10V 2)Line & Neutral=230V Line & Earth=240V Neutral & Earth=10V
How to measure corona loss in a transmission line?(Plz ans only if u know the exact answer)
MCB is used for high rating &MCB is used for lower rating.What is technical difference between ACB & MCB?
-
Civil Engineering (5086) - Mechanical Engineering (4456)
- Electrical Engineering (16639)
- Electronics Communications (3918)
- Chemical Engineering (1095)
- Aeronautical Engineering (239)
- Bio Engineering (96)
- Metallurgy (361)
- Industrial Engineering (259)
- Instrumentation (3014)
- Automobile Engineering (332)
- Mechatronics Engineering (97)
- Marine Engineering (124)
- Power Plant Engineering (172)
- Textile Engineering (575)
- Production Engineering (25)
- Satellite Systems Engineering (106)
- Engineering AllOther (1379)
