Kelvin double-arm bridge clamp for cable conductor resistance test

Abstract

The invention discloses a Kelvin double-arm bridge clamp for cable conductor resistance testing, and belongs to the technical field of cable detection equipment. A horizontal linear guide rail is arranged on a substrate; the two sliding seats are installed on the base plate through horizontal linear guide rails and are arranged close to the two ends of the base plate respectively. Current chucks are respectively arranged on the sliding seats; the pull rod is connected with one end of the substrate and a sliding seat; the tension sensor is arranged between the pull rod and the sliding seat; the balancing weight is connected with the other sliding seat through a stay wire; the insulating cross beam is a beam frame parallel to the horizontal linear guide rails, and the insulating cross beam is arranged between the two sliding seats; the upper end of the vertical pin rod is connected with the insulating cross beam, and the lower end of the vertical pin rod is mounted on the substrate; the vertical pin rod is sleeved with the spring, and the spring transversely applies upward elastic force to the insulator. The potential contact heads are provided with V-shaped contact grooves, and the two potential contact heads are arranged on the two sections of the insulating cross beam respectively. According to the device, the traction tension of the sample conductor can be adjusted and controlled, and the cable cannot be damaged.

Description

technical field [0001] The invention belongs to the technical field of cable testing equipment, and in particular relates to a Kelvin double-arm electric bridge fixture for cable conductor resistance testing. Background technique [0002] According to the national standard, the cable conductor is generally tested by Kelvin double-arm bridge, and the resistance of the sample is measured by the four-terminal measurement method. [0003] At present, the Kelvin double-arm bridge is generally tested with the 630-type fixture sold on the market, and the main applicable conductor diameter range is 1 ~ 630mm 2 copper or aluminum conductors. The two potential ends of the fixture use hand-cranked double semicircle or double V-shaped blade clamping devices; the two current ends use clamping knob grid chucks, and the end of the pattern is connected to a clamping knob to tighten the pattern conductor. A support column is arranged in the middle to support the test sample. This traditi...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the present invention provides a Kelvin double arm for cable conductor resistance test which solves the problems that the currently used fixture is easy to cause damage to the pattern, unreliable test clamping and fixation, and poor test repeatability. Bridge fixture

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