A smart fuse
A fuse and intelligent technology, which is applied in the direction of electrical components, circuits, emergency protection devices, etc., can solve the problems of fuses and fuses without fuses, etc., achieve high performance and improve the effect of intelligence
Active Publication Date: 2016-02-17
苏州市南光电器有限公司
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Problems solved by technology
However, there is no external display and alarm for the blown condition of the fuse in the current fuse
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[0029] The present invention describes an intelligent fuse, whose control principle block diagram is as follows figure 1 As shown, the three-phase line at the lower end of the fuse is connected to the intelligent control unit, (the working power of the intelligent control unit is provided by the internal auxiliary power supply), and the three-phase line at the lower end of the fuse is connected to the intelligent control unit. unit, the intelligent control unit includes a fuse state detection unit, a fuse current detection unit for detecting the current in the fuse, and a central control unit, and the detection results of the fuse state detection unit and the fuse current detection unit are sent to this A central control unit that connects the two units, and the central control unit issues instructions according to the detection results.
[0030] The three-phase line at the lower end of the fuse is connected to the intelligent control unit through the optocoupler isolation uni...
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The invention discloses an intelligent fuse. A lower end three-phase line of the fuse is connected in, an intelligent control unit is arranged in the intelligent fuse, the lower end three-phase line of the fuse is connected in the intelligent control unit, the intelligent control unit comprises a fuse state detection unit, a fuse current detection unit used for detecting current in the fuse, and a central control unit, the detection result of the fuse state detection unit and the detection result of the fuse current detection unit are both sent to the central control unit connected with the fuse state detection unit and the fuse current detection unit, and the central control unit gives out an indication instruction according to the detection results. According to the intelligent fuse, the state of a fuse wire of a fuse body in the intelligent fuse can be monitored, an alarm is given when a state fault occurs, meanwhile, whether the actual fusing time of the fuse wire is judged according to current flowing in the fuse wire, and therefore an alarm is given in advance under the condition that the fuse wire may fuse, the intelligence of the fuse is improved, and the intelligent fuse can have higher using performance.
Description
technical field [0001] The invention relates to a fuse, in particular to an intelligent fuse capable of issuing status failure alarms and pre-alarms. Background technique [0002] Fuses are a simple but effective way to protect electrical appliances. It mainly plays the role of short circuit protection in the circuit. The fuse is mainly composed of a melt and an insulating tube (insulation seat) for installing the melt. When in use, the principle of the fuse is to use the current to flow through the conductor to cause the conductor to heat up. After reaching the melting point of the conductor, the conductor melts, so the circuit is disconnected to protect the electrical appliances and the circuit from being burned out. It is an accumulation of heat, so overload protection can also be achieved. Once the melt burns out, the melt should be replaced. However, there is no external display and alarm for the blown condition of the fuse in the current fuse. Contents of the inv...
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IPC IPC(8): H01H85/30H01H85/46
Inventor 李云宏李建国
Owner 苏州市南光电器有限公司