Magnetic field near a rectangular bus bar

[seadogsmith]

Homework Statement

My project is to use a hall sensor to measure the magnetic flux density close to a rectangular bus bar [csa 19mm x 6.4mm] carrying 300A. But first I need to estimate the magnetic field in order to choose the correct sensor.

Relevant Equations

H = I/2πd

An old field theory notebook has given me a formula for a long straight conductor that H = I/2πd which suggests 2.3873T at 0.2mm. Is it a reasonable approximation to use this as a basis for selecting the sensor? Any help much appreciated.

 

[BvU]

Hello seadogsmith, !

Magnetic flux density is measured in Tesla, so I am missing a factor $\mu_0$ with the dimension of T$cdot$m/A

Furthermore I would stay away at least a few cm from such a current (but I grant you that'just a hunch).

Hyperphysics calculator is useful, but a correction for the geometry of the setup will be needed.

 

[Vanadium 50]

at 0.2mm

That's awfully close. About three human hair widths.

 

[seadogsmith]

Hello seadogsmith, !

Magnetic flux density is measured in Tesla, so I am missing a factor $\mu_0$ with the dimension of T$cdot$m/A

Furthermore I would stay away at least a few cm from such a current (but I grant you that'just a hunch).

Hyperphysics calculator is useful, but a correction for the geometry of the setup will be needed.

That's awfully close. About three human hair widths.

Whoops - I should have said 2mm.