Online residual current circuit breaker dynamic characteristic detection device and detection method thereof
A technology of residual current and detection device, applied in the field of online residual current circuit breaker dynamic characteristic detection device, can solve problems such as disassembly, verification, and installation of current circuit breaker, which require a long time, consume a lot of manpower and material resources, and have hidden dangers in power consumption. , to achieve accurate residual current protection value and open circuit action time, reduce labor intensity, and improve the effect of safety
Pending Publication Date: 2016-12-07
JIANGSU SUYI ELECTRIC APPLIANCE
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Problems solved by technology
Since it takes a long time to disassemble, verify and install the residual current circuit breaker, and the detection efficiency is low, it will not only consume a lot of manpower and material resources, but also cause power outages and bring inconvenience to users
Therefore, the regular testing of the dynamic characteristics of the residual current circuit breaker by the power supply department has not been carried out, which has brought great hidden dangers to the safety of electricity consumption. It is urgent to carry out periodic verification of the online dynamic characteristics of the residual current circuit breaker
Method used
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[0029] Further description will be given below in conjunction with the accompanying drawings and embodiments.
[0030] Such as figure 2 The online residual current circuit breaker dynamic characteristic detection device of the present invention includes a display screen (1), a keyboard (2), a micro-printer (3), a GPRS wireless communication module (4), an ARM processor (11), a single-chip microcomputer ( 16), external digital-to-analog voltage converter (19), filter circuit (20), voltage control current circuit (21), relay group (24), sampling and holding (17), wiring protection circuit (23) and residual current circuit breaker Dynamic unit ground (18).
[0031] Wherein, the ARM processor (11) includes ARMI0 0~7 input and output ports (5), ARMI0 8~15 input and output ports (6), ARMSPI1 input and output ports (7), ARM internal timer (8), ARMUSART2 Input and output ports (9), ARM CPU (10), ARM internal digital-to-analog voltage converter (12), ARMUSART1 input and output ports...
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The invention relates to an online residual current circuit breaker dynamic characteristic detection device and a detection method thereof. The device mainly comprises display equipment, input equipment, dual microprocessors, dual digital-analog voltage converters and a wiring protection circuit. The mode of dual-core combination of an ARM and a single-chip microcomputer is adopted to realize intellectualization of detection signal generation, detection process and detection result processing of the device; the method of cascading of the dual digital-analog voltage converters is adopted so that the method of generating sine wave signals of various different values can be simplified; and feedback modulation is performed on output residual current signals by the device so that the detection accuracy can be enhanced. The device can safely and automatically perform detection of the residual current circuit breaker dynamic characteristics online in a short-term manner so that the bottleneck problem of large disassembling workload of the detection work can be solved, the electric power department is enabled to perform periodic detection work on the residual current circuit breaker and the safety of a low-voltage power distribution line can be enhanced. Besides, inconvenience caused by power outage of the detection work can also be avoided for users through application of the device.
Description
technical field [0001] The invention relates to the detection field of low-voltage electrical appliances, in particular to an online residual current circuit breaker dynamic characteristic detection device and a detection method thereof. Background technique [0002] Residual current circuit breakers, also known as residual current circuit breakers, are used in low-voltage power grids and electrical equipment. They are the most basic and important measures to prevent electrical equipment insulation damage and leakage, which may lead to personal accidental electric shock casualties, equipment burning and fire accidents. one. my country's residual current circuit breaker began to develop in the mid-1970s, and was first popularized and applied in rural low-voltage power grids. After continuous improvement and development from the 1980s to the 1990s, it has formed a complete variety, complete specifications, and conforms to IEC international standards. A product line of residual...
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Inventor 徐承喜陈则平李正
Owner JIANGSU SUYI ELECTRIC APPLIANCE