CN2134714Y - Pull-out fuse having indication - Google Patents

Abstract

The utility model relates to an improved plug-in fuse, particularly a plug-in fuse having indications capable of intuitionally identifying the on and off states of a fuse wire, being suitable for electrical sources of from 220V to 380V. The utility model is composed of a base body, a conducting connecting insert, a fuse wire, a current limiting resistor, a neon tube, a display cover, etc. When the utility model is used, whether the fuse wire is in a good condition or not can be accurately identified according to whether the neon tube produces glow or not, and the fuse is unnecessary to be pulled out for checking. The utility model has the advantages of accurate and clear display, safe reliability, time saving, labour saving, convenient working for maintainers.

Description

Pull-out fuse having indication

The utility model relates to a kind of improved plug-in fuse, and the particularly a kind of display type plug-in fuse that can intuitively discern the fuse on-off is applicable to 220V～380V power supply.

Existing plug-in fuse connects plug-in unit by porcelain matrix, conduction and parts such as securing member, fuse and securing member thereof, insulation sealing are formed.When circuit generation overload flow, the specified fuse of fuse is blown, and makes circuit obtain overcurrent protection.Use this kind plug-in fuse, in case disconnection fault occurs, the maintainer often pulls up fuse earlier, checks whether fuse is intact, confirms that fuse is not disconnected, plug fuse again, such one pulls out one inserts the operate as normal that certainly will influence other circuit arrangements, even fusible link has broken, such inspection method is inconvenient, particularly at night, must illuminate by other light sources.Very inconvenient.

Whether intact the purpose of this utility model provide a kind of fuse of not pulling up and just intuitively discern fuse display type plug-in fuse, the utility model is simple in structure, clear display, correct, with low cost uses the utility model time saving and energy saving, is convenient to service work greatly.

Task of the present utility model is finished with following method: connect the display type plug-in fuse that plug-in unit, fuse, current-limiting resistance, neon tube, demonstration cover, insulation sealing are formed by matrix, conduction, between the conduction connection plug-in unit at fuse two ends, seal in a current-limiting resistance and neon lamp, make the current-limiting resistance and the neon lamp of serial connection in parallel with fuse, when the fuse fuse is worked under rated current, circuit is normal, current-limiting resistance and the short circuit of neon tube fuse, neon tube two ends be because of potential-free, and can not blaze; When the circuit overload, fuse is blown, and at this moment, the neon tube two ends cause neon tube to blaze because of producing electromotive force, and luminous as long as the maintainer sees neon tube, it is disconnected to discern fuse, otherwise then fuse is intact, again needn't pull up fuse and check the fuse on off operating mode.Use the utility model directly perceived, make things convenient for, save time, laborsaving, safe, reliable.

Below with reference to accompanying drawing the utility model is further described.

Fig. 1 structure chart of the present utility model;

Fig. 2 electrical schematic diagram of the present utility model.

Made by ceramic material or other materials with good insulation performance and mechanical strength with reference to Fig. 1,2 matrixes 1, the two ends of matrix 1 are given respectively and are stayed installing hole 2 middle parts to leave a demonstration vestibule 11, and the vestibule inwall has two fairleads 6.

Conduction connects 4 two of plug-in units, all has copper material to make.To conduct electricity by installing hole 2 by screw 3 respectively and connect plug-in unit 4 and be fastened on the matrix 1.Fill with insulation sealing 10 in the installing hole 2, fuse trip bolt 9 is equipped with in a side of conduction connection plug-in unit 4, and root has attachment screw 5.

Current-limiting resistance 7 is connected in series with neon tube 12, and is placed in the demonstration vestibule 11 of matrix 1, and serial connection part two ends lead-in wire is connected to respectively on the attachment screw 5 by fairlead 6.

Fuse 8 is pressed the circuit Rated Capacity Choice, and its two ends are fastened on conduction respectively and connect on the fuse trip bolt 9 of plug-in unit 4.

Show that cover 13 adopts the insulation transparent materials to make, be contained in show vestibule 11 above, enable clear and intuitive neon tube 12 and blaze.

Claims (3)

1, a kind of by conduction connection plug-in unit 4, the plug-in fuse that fuse 8 is formed is characterized in that by being provided with fairlead 6, the display type plug-in fuse of the matrix 1 of demonstration vestibule 11, current-limiting resistance 7, neon tube 12, demonstration cover 13 compositions.

2, by the display type plug-in fuse of claim 1 regulation, it is back in parallel with fuse 8 to it is characterized in that described current-limiting resistance, neon tube 12 are connected in series.

3, by the display type plug-in fuse of claim 1 or 2 regulations, it is characterized in that the serial connection part of described current-limiting resistance 7, neon tube 12, be installed in the demonstration vestibule 11.

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