a safety barrier
A safety barrier and control unit technology, applied in the field of safety barriers, can solve problems such as disasters and load damage
Active Publication Date: 2016-03-30
BEIJING ZHONGKE SIPENG TECH
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Problems solved by technology
[0003] The present invention proposes a safety barrier, which solves the problem in the prior art that the fuse fuse needs a certain period of time to accumulate energy, causing the load to be damaged before the fuse fuse and causing disasters.
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[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0046] Such as Figure 1-Figure 3 As shown, a safety barrier described in the present invention includes:
[0047] a first control unit 1;
[0048] The first load 2 and the load group used to share the excess voltage, the first load 2 is connected to the load group, wherein the load group includes the second load 3, the third load 4 and the fourth load 5, the second load 3 and the third load The load 4 is connected in parallel with the fourth load 5 after being c...
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The invention provides a safety grid which solves the problem that in the prior art, energy needs to be accumulated for a certain time before a protective tube is melted, and disasters can happen due to the fact that a load is damaged before the protective tube is melted. The safety grid comprises a first control unit, a first load, a load set, a second control unit, a third control unit, a fourth control unit and a fifth load. The load set comprises a second load, a third load and a fourth load, wherein the second load and the third load are connected in series and then are connected with the fourth load in parallel, the third control unit is connected with the first load, the second control unit is connected with the third control unit, the fourth control unit is respectively connected with a power input end and the second control unit, and the fifth load is arranged between the power input end and the second control unit. The safety grid can switch off an output wire timely on the condition of excessive voltages or excessive currents, and the problem that disasters can happen due to external electric sparks generated due to the fact that output electric energy exceeds the range of an allowed value due to excessive output voltages or excessive currents is avoided.
Description
technical field [0001] The invention relates to the field of power supplies, in particular to a safety barrier that prevents combustible gases from burning or exploding due to electric sparks caused by external circuits. Background technique [0002] In the prior art, the overcurrent / overvoltage protection of the power supply adopts a first-level overcurrent / overvoltage protection. Such as over-current insurance tube or over-voltage protection tube, but the speed of over-current / over-voltage protection through the above-mentioned method is slow. If over-voltage or over-current occurs, it needs enough energy to accumulate for a certain period of time before the insurance tube can "fuse". During this period, the load may overheat and generate electric sparks, which may cause disasters; in addition, when the input voltage itself has a large range of changes, the protection point of the overvoltage protection device can only take the upper limit value. Contents of the inventio...
Claims
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IPC IPC(8): H02H3/20H02H3/08
Inventor 蒋明明
Owner BEIJING ZHONGKE SIPENG TECH