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What is current density of copper busbar for 4000A?
The current density for a copper busbar will vary as the size of the bar. And no, that's not a trick answer. More information about the application is needed to determine what size the busbar is, since only the ampacity was cited here. There are different specifications (sizes) for busbars, as you know. The deal is that there is usually a "temperature rise" factor that delimits what you're supposed to use. Higher temps mandate bigger bars, which you probably already figured out. The basic busbar size is set on how much heat the busbar will generate when conducting it maximun rated current. But factors regarding the thermal environment in which the unit is operating must be considered. Minimum size for 4000A is probably 1/4 x 10, but some applications will require up to 3/4 x 10 with some allowing something in between. With a specified size bar, you can easily calculate the current density by dividing the current (4000A) by the cross-sectional area. Pick one and go for it.
What is impedance voltage in a transformer?
Power transformers have an impedance (Z) rating that is listed in %. So the nameplate might state 5% Z for example. What this means is that when the secondary conductors are bolted together then 5% of the rated primary voltage is applied and will generate 100% current in flow in the secondary. Example: you have a 75KVA Delta-Wye 5% Z transformer with a 480V primary rating and 208/12 secondary rating. The amp rating of the secondary is 208A [75,000/(1.732x208)] So if you applied 24VAC to the primary with the secondary bolted together with busbar then you would have 208A of current flow.
What a bus bar?
The term, 'bus', in 'busbar', comes from the word, 'omnibus', meaning 'to serve all'. A busbar, then, is a copper bar that connects several independent circuits together. For example, a generator might be connected to a busbar, serving several circuits all connected to that same busbar. There are separate busbars for line, neutral, and earthing (grounding) connections.
Why busbar melted on circuit breaker primary side?
due to heat only it has malted . when over current is flowing in the Al. or cu. conductor at that time it will get damage or flash over will come.
How do you calculate the amps rating of copper bus bars?
A formula for 60 Hz with reasonable ventilation: Imax = 7.73 x A^0.5 x p^0.39 A is the cross-section area in sq. mm and p is the circumference of the busbar's cross-section in mm. So for a busbar of 100 mm x 5 mm the maximum current is 1391 amps.
What is meant by 1.55 in busbar current calculation?
Busbar current rating for 1 square inch is 1000a.
What is mean by busbar in electrical engineering?
it is an infinite current carrying conductor which doesn't have voltage drop.
What is Current Carrying capacity of 50 mm X 6 MM copper flat busbar?
300ams
What types of current transformer?
Current transformer are used for measuring current in a bus bar without disconnecting it by means of ammeter.There are three types 1.bar type current transformer 2.toroidal current transformer 3.wound type current transformer
What is the torque for a 800Amps electrical busbar?
65 N/m is sufficient for 800A Busbar.
What is current density of copper busbar for 4000A?
The current density for a copper busbar will vary as the size of the bar. And no, that's not a trick answer. More information about the application is needed to determine what size the busbar is, since only the ampacity was cited here. There are different specifications (sizes) for busbars, as you know. The deal is that there is usually a "temperature rise" factor that delimits what you're supposed to use. Higher temps mandate bigger bars, which you probably already figured out. The basic busbar size is set on how much heat the busbar will generate when conducting it maximun rated current. But factors regarding the thermal environment in which the unit is operating must be considered. Minimum size for 4000A is probably 1/4 x 10, but some applications will require up to 3/4 x 10 with some allowing something in between. With a specified size bar, you can easily calculate the current density by dividing the current (4000A) by the cross-sectional area. Pick one and go for it.
What is impedance voltage in a transformer?
Power transformers have an impedance (Z) rating that is listed in %. So the nameplate might state 5% Z for example. What this means is that when the secondary conductors are bolted together then 5% of the rated primary voltage is applied and will generate 100% current in flow in the secondary. Example: you have a 75KVA Delta-Wye 5% Z transformer with a 480V primary rating and 208/12 secondary rating. The amp rating of the secondary is 208A [75,000/(1.732x208)] So if you applied 24VAC to the primary with the secondary bolted together with busbar then you would have 208A of current flow.
What a bus bar?
The term, 'bus', in 'busbar', comes from the word, 'omnibus', meaning 'to serve all'. A busbar, then, is a copper bar that connects several independent circuits together. For example, a generator might be connected to a busbar, serving several circuits all connected to that same busbar. There are separate busbars for line, neutral, and earthing (grounding) connections.
What is difference between to busbar and feeder?
The busbar is used as a conductor and is used as a connection between the parallel and the feeder. The feeder is the supply, and it handles the relays.
What is the difference between busbar and busbar trunking system?
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Why busbar melted on circuit breaker primary side?
due to heat only it has malted . when over current is flowing in the Al. or cu. conductor at that time it will get damage or flash over will come.
How do you calculate the amps rating of copper bus bars?
A formula for 60 Hz with reasonable ventilation: Imax = 7.73 x A^0.5 x p^0.39 A is the cross-section area in sq. mm and p is the circumference of the busbar's cross-section in mm. So for a busbar of 100 mm x 5 mm the maximum current is 1391 amps.
