CN87205637U

CN87205637U - Fuse with indicator

Info

Publication number: CN87205637U
Application number: CN 87205637
Authority: CN
Inventors: 江益民
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-03-28
Filing date: 1987-03-28
Publication date: 1987-10-21

Abstract

The utility model discloses a fuse with an indicator. The fuse with an indicator is characterized in that the two ends of a resistor R and a neon bulb which are concatenated with each other are connected to the two fixed ends of a fuse wire in a fuse, so that the resistor R and the neon bulb can be connected parallel with the fuse wire, and the neon bulb is arranged on the housing of the fuse at a position which can be easily observed. Once the fuse with an indicator is adopted in a complicated power supply system, after the open circuit of the fuse wire is caused by circuit malfunctions, indicator signals can be displayed on the housing of the fuse which is at the open state, so that an electrician can maintain in time.

Description

Fuse with indicator

The utility model relates to a kind of emergency protective device, particularly relates to the protective device that a kind of fusing owing to fusible material makes current interruptions, i.e. fuse.

(110 volts to 380 volts) after electric current is crossed ambassador's fuse failure, do not have signal to show as the fuse of overload, short-circuit protection on the shell of fuse in the existing mains-supplied system.Like this, in a comparatively complicated electric power system, because the fuse that adopts is more, just be difficult to determine is the fuse open circuit of which fuse actually, this makes troubles just for the timely maintenance of circuit, and the electrician often will check one by one that fuse just can find out the fuse that is in open-circuit condition.

The fuse that the signal demonstration can be provided on the shell of fuse after therefore, this practical purpose is to provide a kind of fuse in fuse by overcurrent fusing.

Referring now to Fig. 1,, this is circuit theory diagrams of the present utility model, above-mentioned purpose of the present utility model realizes in the following manner, promptly in parallel with two stiff ends of fuse in the fuse ［ 1 ］ the two ends of the resistance R of series connection mutually and neon bulb ［ 2 ］, and above-mentioned neon bulb ［ 2 ］ is installed in is easy to the position that people observe on fuse ［ 1 ］ shell, reference number among the figure ［ 3 ］ is circuit load.Because fuse ［ 1 ］ is mounted in the current supply circuit, after its fuse disconnects, still having little electric current in whole power supply circuits exists, thereby on two terminals of fuse, still have potential difference, this potential difference will make on two terminals that are connected fuse and the neon bulb that becomes state in parallel with fuse through build-up of luminance after the step-down of resistance R.When fuse is in closed circuit state, owing on two terminals, do not have the potential difference that is enough to make the neon bulb build-up of luminance, so neon bulb build-up of luminance not.

Fig. 2 is the application of the utility model in three-phase circuit, and is wherein identical among the element represented of reference number and Fig. 1.If have only the fuse open circuit of a phase, the neon bulb build-up of luminance on the shell of this fuse of going up mutually then, the neon bulb on the fuse in other two-phase is build-up of luminance not, thereby just can need change fuse by very fast definite which phase fuse.

The utility model has the advantages that conspicuous, if in electric power system, adopt such fuse, circuit break down cause fuse open circuit in the fuse after, promptly can on the shell of the fuse that is in open-circuit condition, demonstrate index signal, the electrician can determine it is the fuse open circuit of which or which fuse easily, and in time replace with new fuse, because this fuse structure that has an indication is simple, easy to make, cost is compared increase with original fuse very few, so be very suitable for promoting the use of.

Below in conjunction with accompanying drawing an embodiment of the present utility model is described in further detail, thereby makes structure of the present utility model and advantage more obvious, wherein:

Fig. 1 is circuit theory diagrams of the present utility model;

Fig. 2 is the application schematic diagram of the utility model in three-phase circuit;

Fig. 3 is the structural representation of an embodiment of the present utility model.

Referring now to Fig. 3,, this is the structural representation of an embodiment of the present utility model, the fuse of Cai Yonging is that the most frequently used can be used for exchanges 110 volts to 380 volts RCIA type fuse ［ 1 ］ in the present embodiment, shown in the figure is the socket ［ 4 ］ of this fuse, this socket ［ 4 ］ is to be made by the ceramic material of electric insulation, at the two ends of socket ［ 4 ］ metal insert ［ 5 ］ is housed, this inserted sheet ［ 5 ］ is fixing by the set bolt ［ 8 ］ that is fixed in the fixing hole ［ 7 ］, set bolt ［ 8 ］ is also fixing with fuse ［ 12 ］ simultaneously, also there is a pair of location hole ［ 9 ］ at back and the corresponding position of inserted sheet ［ 5 ］ at socket ［ 4 ］, and bolt ［ 10 ］ is crossed location hole ［ 9 ］ inserted sheet ［ 5 ］ is fixed.Back central part at socket ［ 4 ］ has a chamber ［ 11 ］, (present embodiment adopts RJ1/4w to one lead with resistance R, the resistance of 416K-510K) and neon bulb ［ 2 ］ (present embodiment adopt NHO-10 type neon bulb) series connection, the resistance R and the neon bulb ［ 2 ］ of series connection place chamber ［ 11 ］ mutually, the two ends of lead are by bolt ［ 8 ］ location, thereby make the resistance R of mutual series connection and neon bulb ［ 2 ］ in parallel with fuse ［ 12 ］.

Claims

1, a kind of fuse that has indication, of the present utility model being characterised in that, the two ends of the resistance R of mutually series connection and neon bulb are connected on two stiff ends of fuse in the fuse so that make it in parallel, and above-mentioned neon bulb is installed in the position that is easy to people's observation on the fuse shell with fuse.

According to the described fuse of claim 1, it is characterized in that 2, the central part at above-mentioned fuse sockets back has a chamber, the resistance of above-mentioned mutual series connection and neon bulb place this chamber.