An energy-limited explosion-proof circuit
An energy-limited circuit and energy-limited technology, applied in the field of energy-limited explosion-proof circuits, can solve problems such as poor adaptability, increased product cost, and large volume, and achieve the effects of easy popularization, reliable functions, and low cost
Active Publication Date: 2018-11-06
SHENZHEN OCEANS KING LIGHTING ENG CO LTD +1
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Problems solved by technology
The existing safety barrier has a fixed shape structure, which is bulky and not adaptable. In addition, installing a surge protector will increase the cost of the product
Method used
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[0023] 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.
[0024] see figure 1 , is a structural schematic diagram of the first embodiment of the energy-limited explosion-proof circuit provided by the present invention. Such as figure 1 As shown, the energy-limiting explosion-proof circuit may include a surge suppression circuit 1 and an energy-limiting circuit 2, and the energy-limiting circuit 2 includes a first voltage regulator tube ZD1, a first resistor R1, and a first fuse F1, wherein: the first voltage regulator tu...
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The embodiment of the invention discloses an energy-limiting explosion-proof circuit comprising a surge suppression circuit and an energy limiting circuit. The energy limiting circuit comprises at least one voltage regulator tube, a first resistor and a first fuse. The cathode of the at least one voltage regulator tube is connected with one end of the first resistor, and the anode of the at least one voltage regulator tube is connected with the negative electrode of a power output end. The other end of the first resistor is connected with the positive electrode of the power output end. One end of the first fuse is connected with the cathode of the at least one voltage regulator tube, and the other end of the first fuse is a first output end of the energy-limiting explosion-proof circuit. The surge suppression circuit is connected between the power output end and the energy limiting circuit, and is used for suppressing transient overvoltage. By implementing the energy-limiting explosion-proof circuit disclosed by the invention, energy supplied to an intrinsically safe circuit can be effectively limited to achieve an explosion-proof effect, and a surge protection function can be achieved. The energy-limiting explosion-proof circuit has the advantages of simple structure, low cost, and easy popularization.
Description
technical field [0001] The invention relates to the field of electronic technology, in particular to an energy-limited explosion-proof circuit. Background technique [0002] Intrinsically safe circuits refer to circuits that cannot ignite specified explosive gas atmospheres under normal operation and fault conditions specified in standards by any electric spark or any thermal effect. At present, intrinsically safe circuits, as power supply equipment for communication, monitoring, detection, alarm and control systems, have been widely used in environments containing explosive mixtures such as petroleum, chemical, textile and coal mines. In order to meet the explosion-proof requirements, a safety barrier is usually installed between the intrinsically safe circuit and the non-intrinsically safe circuit to control the energy provided to the intrinsically safe circuit within the standard range. In order to avoid damage to the circuit caused by surge voltage, a surge protector is...
Claims
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IPC IPC(8): H02H9/04H02H3/087
Inventor 周明杰王现中
Owner SHENZHEN OCEANS KING LIGHTING ENG CO LTD