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Insulating material molding body for arc extinction and circuit breaker using same

A technology of insulating materials and molded bodies, applied in the direction of circuit breaker components, etc., can solve the problems of continuous disconnection and the easy damage of the circuit breaker frame, so as to reduce the amount of resin, inhibit the damage of the frame, and achieve high resin strength Effect

Active Publication Date: 2014-12-17
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, although improvements in strength, heat resistance, and pressure resistance have been confirmed for these arc-extinguishing insulating material molded products, there are some problems that cannot be achieved in the overload interruption test conducted from the viewpoint of durability of the interruption performance. The problem of continuous circuit breaking for a specified number of times
In addition, there is a problem that the internal pressure increase in the arc extinguishing device caused by pyrolysis gas generated during arc extinguishing cannot be suppressed, and the frame of the circuit breaker is easily damaged due to the internal pressure increase during arc extinguishing.

Method used

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  • Insulating material molding body for arc extinction and circuit breaker using same
  • Insulating material molding body for arc extinction and circuit breaker using same
  • Insulating material molding body for arc extinction and circuit breaker using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0058] The arc-extinguishing insulating material molded body of the present embodiment includes an inorganic filler A1 decomposed at 350°C to 1400°C, a needle-shaped inorganic filler B1, and a matrix resin, and the inorganic filler A1 and the inorganic filler B1 are The total content is 5 to 50% by weight.

[0059] The needle-shaped inorganic filler B1 compounded for the purpose of improving the strength of the molded body is different from the inorganic filler A1 that decomposes at 350°C to 1400°C, and may not decompose at 1400°C or less Material. In this case, it can be seen that when the one inorganic filler A1 is thermally decomposed and scattered, the other inorganic filler B1 that does not thermally decompose is also scattered, and the surface of the arc-extinguishing insulating material molded body often becomes resin and The surface where the inorganic filler is mixed can also achieve the above object.

[0060] In order to efficiently scatter the inorganic filler B1 ...

Embodiment approach 2

[0078] The arc-extinguishing insulating material molded body of the present embodiment includes an inorganic filler A2 and a matrix resin that do not decompose below 1500°C,

[0079] At least a part of the above-mentioned inorganic filler A2 is covered with an inorganic surface treatment agent that decomposes below 1500°C,

[0080] The above-mentioned inorganic filler A2 is acicular or fibrous, or contains an acicular inorganic filler B2 different from the above-mentioned inorganic filler A2.

[0081] The inorganic filler treated with the inorganic surface treatment agent is bonded to the matrix resin through the inorganic surface treatment material. When exposed to an electric arc and the inorganic surface treatment agent decomposes, the inorganic filler material loses its adhesion to the matrix resin. In addition, due to the impact or pressure caused by the generation of decomposed gas or the change in form when the surface treatment agent is decomposed, the inorganic fille...

Embodiment 1～5

[0113] (Examples 1-5, Comparative Examples 1-4)

[0114] Table 1 shows the material compositions of the arc-extinguishing insulating material molded articles of Examples 1 to 5 and Comparative Examples 1 to 4 of Embodiment 1 described above. In addition, in Example 1, the inorganic filler A1 is needle-shaped, and also serves as the inorganic filler B1. In each material, the following products were used. Polyamide 46 (TS350 manufactured by DSM), acicular calcium carbonate (Wiscal A manufactured by Maruo Karsium: decomposition temperature 600°C), 3MgO·4SiO 2 ·H 2 Talc (Microse K-1 manufactured by Nippon Talc Co., Ltd.: decomposition temperature 900°C), boehmite (Beimite C20 manufactured by Daimei Chemical Co., Ltd.: decomposition temperature 500°C), wollastonite (manufactured by Kinseimatec) with O as the main component SH-800S, Otsuka Chemical Biostar), glass fiber (Nittobo CSX 3J-451). In addition, wollastonite and glass fiber will not decompose below 1400°C, and generally...

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Abstract

The present invention provides an insulating material molding body for arc extinction, which is used for a circuit breaker, wherein the insulating material molding body comprises an inorganic filling material A1 disintegrated under a temperature range from 350 DEG C to 1400 DEG C, a needlelike inorganic filing material B1 and a matrix resin, the total content of the inorganic filling material A1 and the inorganic filling material B1 is from 5 to 50 wt.%. The present invention also provides a further insulating material molding body for arc extinction, which is used for the circuit breaker. The insulating material molding body comprises an inorganic filling material A2 which is not disintegrated under a temperature lower than 1500 DEG C, an inorganic filling material A2 and a matrix resin, wherein at least a part of the inorganic filling material A2 is covered by an inorganic surface treating agent disintegrated under the temperature lower than 1500 DEG C, the inorganic filling material A2 is needlelike or fibrous, or comprises a needlelike inorganic filling material B2 different from the inorganic filling material A2.

Description

technical field [0001] The present invention relates to an arc-extinguishing insulating material molded body for eliminating arcs generated from contacts when a circuit breaker or the like is interrupted, and a circuit breaker using the same. Background technique [0002] Circuit breakers and earth leakage circuit breakers for wiring are used to open the circuit and cut off the power supply from the primary side when an abnormal current flows in the secondary side circuit (load, circuit) due to overload or short circuit, thereby A device to avoid damage to load circuits or wires. [0003] In such wiring circuit breakers and earth leakage circuit breakers, when the excess current or rated current is energized, when the contact of the movable contact element is separated from the contact of the fixed contact element, an arc will be generated between the two. . exist figure 1 (a) and figure 1 (b) schematically shows the movable contact element and the fixed contact element ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H73/18
Inventor 久保一树中田光昭伏见征浩江古宪一上元利和大川达也
Owner MITSUBISHI ELECTRIC CORP