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.
1026How to apply 'c' license and also explain what is difference between 'c' and 'b'license.i am also working in one of the private company.i have finished my diploma in 2014 .i have already finished in ITI electrician course.....
1090what is conductor constant of raccun conductor
CSPDCL-Chhattisgarh State Power Distribution Company Limited,
1131Please tell me in DETAIL about the following 3 types of fuses or recommend me a good power system protection book or a website link ? 1.Dropout Fuse 2.Striker Fuse 3.Empulsive fuse (not sure if its impulsive or explosion fuse , sorry)
1211What is the difference Marshaling box and RTCC (Relay tap changer circuit) Panel of transformer ?
1 4209Do you know what is dry-out test in x'mer
First American Corporation, GPSC Gujarat Public Service Commission, Jindal,
1675Post New Electrical Engineering Questions
how to setting voltage RTCC panel
how we decide wire gauge for ac or dc coil and what is the basic diff. B/w these two coil?
one split ac how can told of this ac which Tr tell me us
which of the following elements is not present in stainless steel
which are the criterias needed to select the kind of neutral earthing(solid earthing,resistance earthing,etc.) at various voltage levels in electrical distribution?
Does all the output contacts (N/O as well as N/C) of a Numerical relay operate when relay receives a binary input/inputs or contacts are designated to specific logic input/inputs and only these contacts operate?
1. If 8.35%Z means the percentage impedance of 132kV-line from power company, we will like to reconfirm its base capacity.
Diagram and details of polarity test for Current Transformer 11kv 400/200/100/1A
What is the capacity of the Fastners 12mm?
why the colour of insultor stack , petticoat is brown. Is it has some technical reason.
In the magnetic fluxes, what is the role of armature reaction?
In convertor can we use rectifier thyristor in place of invertor thyristor with explain.
The metal-enclosed switchgear and controlgear is subdivided into three types: 1. metal-clad switchgear and controlgear; 2. compartmented switchgear and controlgear 3. cubicle switchgear and controlgear. What is the main differnence between them. State some example.
Why you want to join non technical field when you are an engineer?
What is industrial plc
