huadong cable overhead abc cable 

Currently stranded resistance measuring jig shape much like a knife-shaped and bounded by

tightening the bolts on the sample to generate pressure. Due to the presence of aluminum monofilament surface oxide film, when measuring the current through the introduction of a

sample of this form jig, its current distribution is often uneven, stranding the outer filaments current density. This phenomenon increases with the cross section stranded serious. V-type current clamp, is less than knife-like, annular current folder have a greater improvement, but not allow the current to achieve the desired homogeneous state. Uneven distribution measuring current to voltage terminal 1m apart two of the voltage difference is greater than the current uniform measuring voltage difference between two voltage terminal. In this case, the shape of the voltage terminal clamps, pressure for closer improvements are often not effective. Therefore, the key to solve the problem is how to measure the resistance measuring current and voltage terminal clamps uniform requirements, can measure the current uniform from the huadong cable group.

For all single wire overhead cable core reliably and current lead-in phase, and the line between the insulating core of the monofilament along the filament current flow into a spiral. So in the same filament diameter, homogeneous case, the sample perpendicular to the section line should be the core and other planes, in between the filaments of the section on the potential difference is zero. In the allelic case, the potential difference between the voltage at the terminal will not shape voltage clamp, the way contact with the sample surface changes and changing the pressing force of the sample.

Stranded resistance failure phenomenon occurs, because all that resistance measurements failed to uniformly measure the current flowing through the specimen.

 

huadong cable overhead abc cable