Single-phase electric energy meter built-in load switch current zero-crossing breaking arc-extinguishing system and method
A load switch and current zero-crossing technology, which is applied in the field of load switch testing for electric energy meters, can solve problems such as low accuracy, unfavorable maintenance, complex structure, etc., and achieve the effects of improving efficiency, improving service life and safety, and reducing costs
Inactive Publication Date: 2019-06-25
HANGZHOU XILI INTELLIGENT TECH CO LTD
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Problems solved by technology
[0005] Aiming at the problems of complex structure, high cost, low accuracy and unfavorable maintenance in the prior art, the present invention discloses a single-phase electric energy meter built-in load switch current zero-crossing breaking arc suppression system and method, through hardware circuits and corresponding The algorithm realizes the differential and accurate arc suppression of different electric energy meters, which is convenient for mass production to improve efficiency, reduce costs, and improve safety during use
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[0029] Example: such as figure 1 Shown is a single-phase electric energy meter built-in load switch 5 current zero-crossing breaking arc suppression system, including load switch 5, also includes processor 1, memory (not shown), metering chip 2, execution module 3 and judgment module 4 , the processor 1 is connected to the input end of the execution module 3, the memory and the metering chip 2, the output end of the execution module 3 is connected to the control line of the load switch 5, the metering chip 2 detects the load current, and the judgment module 4 The output end of the judgment module 4 is connected to the output end of the load switch 5 , and the input end of the judging module 4 is connected to the processor 1 . Through the processor 1, the metering chip 2 and the judging module 4, the switching demand is judged, and then the switching operation of the load switch 5 is performed through the execution module 3, so that the operation efficiency is high and the saf...
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The invention discloses a single-phase electric energy meter built-in load switch current zero-crossing breaking arc-extinguishing system and method. The system comprises a load switch, a processor, amemory, a metering chip, an execution module and a judging module. The processor is connected with the input end of the execution module, the memory and the measuring chip. The output end of the execution module is connected with the control line of the load switch. The metering chip detects the load current. The output end of the judging module is connected with the processor. The input end of the judging module is connected with the output end of the load switch. The arc-extinguishing method comprises the steps that the disconnection time of the load switch in each electric energy meter ismeasured; the disconnection time is saved to the memory, and is read by the processor when used; the metering chip and the processor judge the time point at which a switch out signal is issued; if delay is not required, switch out is directly carried out; if delay is required, the next step is carried out; the required delay is calculated according to the saved disconnection time; and the switch out signal is issued after the delay. According to the invention, the efficiency is improved; the cost is reduced; and the safety is improved.
Description
technical field [0001] The invention relates to the technical field of load switch testing for electric energy meters, in particular to a zero-crossing breaking and arc suppression system and method for a built-in load switch of a single-phase electric energy meter. Background technique [0002] Since the promotion and application of smart electric energy meters in 2010, the application of charge control functions such as electric energy meter pulling and closing has increasingly become an important technical means for power supply services of electricity sales enterprises. In order to protect the contacts of the load switch and avoid excessive burning to reduce the life of the contacts, the technical specification of the smart electric energy meter proposes that there should be corresponding hardware or software arc suppression measures when the electric energy meter with the built-in load switch is used for switching operation. The arc suppression measures of the load swit...
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Inventor 朱永丰吴建锋钱艳军
Owner HANGZHOU XILI INTELLIGENT TECH CO LTD