Inspection Device And Inspection Method Of Insulating Property, And Manufacturing Method Of Insulated Wire
A technology for insulated wires and inspection devices, which is applied in the direction of measuring devices, measuring electricity, and testing circuits, etc., which can solve the problems of differences in evaluation results and the inability to reliably guarantee the insulation properties of insulated wires
Inactive Publication Date: 2014-09-24
HITACHI METALS LTD
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Problems solved by technology
However, in this evaluation method, only the insulation properties of both ends of the insulated wire are evaluated, and therefore, the insulation properties of the entire length of the insulated wire may vary greatly depending on the sampling method or the number of samples.
That is, sometimes the insulation characteristics of the entire length of the insulated wire cannot be reliably guaranteed
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[0023] First, prior to describing the embodiments of the present invention, knowledge acquired by the inventors will be described. As described above, in the evaluation test of the insulation properties of the wire, the inspection voltage applied to the insulated wire as the moving wire is often set to a low voltage of several hundreds of volts. Therefore, even an insulated wire having insulation breakdown cannot be detected as a defective product, and an insulated wire whose insulation properties are not sufficiently ensured may be manufactured. Therefore, in order to improve the assurance of the insulation properties of the insulated wire over the entire length, the inventors of the present invention focused on applying a high inspection voltage of the same level (for example, several thousand volts) as the voltage (guaranteed voltage) required to ensure the insulation properties of the insulated wire. . The present invention is an invention based on the above knowledge obt...
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The invention provides an inspection device, which can extend as long as an insulated wire and inspect insulating property, and an inspection method of the insulating property, and a manufacturing method of the insulated wire. The inspection method of the insulating property is equipped with a guaranteeing voltage applying unit for applying a guaranteeing voltage to a mobile line, a grounding unit which is arranged on a downstream side of the guaranteeing voltage applying unit and removes charged charges in the mobile line by means of grounding of the mobile line, and a check voltage applying unit which is arranged on a downstream side of the grounding unit, applies a check voltage lower than the guaranteeing voltage to the mobile line and detects a leakage current value.
Description
technical field [0001] The present invention relates to an insulation property inspection device, an insulation property inspection method, and an insulated wire manufacturing method. Background technique [0002] Generally, an insulated electric wire includes a lead wire (core wire) and an insulating layer formed by covering the periphery of the lead wire with an insulating material. Such an insulated wire is manufactured by an insulated wire manufacturing apparatus comprising: an insulating material coating device for coating an insulating material around a conductor to form an insulating layer; Roll around. [0003] Evaluation of the insulation properties of an insulated wire is performed, for example, by a test for measuring a breakdown voltage (BDV: BreakDown Voltage). That is, the insulation properties of the insulated wire are evaluated by measuring the leakage current value while applying a predetermined voltage (inspection voltage) to the insulated wire. In this ...
Claims
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IPC IPC(8): G01R31/12G01R31/14
CPCG01R31/022G01R31/1272G01R31/59
Inventor 谢鹏菊池英行日野大辅
Owner HITACHI METALS LTD