Control device cooperated with plug-in type watt-hour meter
A technology of control devices and watt-hour meters, applied in the direction of circuits, coinless or similar appliances, coin-operated equipment for distributing discrete items, etc., can solve the problem of high failure rate, affecting the reliability and safety of power supply, and circuit breakers Complicated structure and other problems, to achieve the effect of good power supply reliability, guaranteed reliability, and low failure rate
Active Publication Date: 2011-05-25
人民电器集团仪器仪表有限公司
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AI Technical Summary
Problems solved by technology
The structure of the circuit breaker is complicated, the operation of the bimetal element is unstable, and the failure rate is high
[0004] In addition, the user's transmission line is often equipped with multiple circuit breakers and multi-level circuit breaker protection. Therefore, when a circuit breaker at one end of the lower circuit breaker is disconnected, the circuit breaker at the upper level will be disconnected quickly, causing multiple power supply interruptions to form a leapfrog trip. , making other electrical appliances unusable, seriously affecting the reliability and safety of power supply
Method used
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Embodiment 1
[0017] See figure 1 , the control device used in conjunction with the plug-in watt-hour meter of the present invention includes a circuit breaker KM for controlling the on-off of the output power of the plug-in watt-hour meter; the first normally open contact switch K1 of the circuit breaker KM and the second The normally open contact switch K2 is connected in series with the live wire output line and the zero line output line of the card-type watt-hour meter; the circuit breaker KM has a closed control voltage signal input terminal IN; the power-on signal output terminal of the card-type watt-hour meter is connected to The closing control voltage signal input terminal IN of the circuit breaker KM.
[0018] See figure 1 , in the live wire output line of the plug-in watt-hour meter, the first normally open contact switch K1 of the circuit breaker KM is connected in series with the first overload and short-circuit release F1; in the zero-line output line of the plug-in watt-hou...
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The invention relates to a control device working together with a card plug-in type kilowatt hour meter, which comprises a circuit breaker for controlling the on-off of the output power supply of the card plug-in type kilowatt hour meter. A first normal open contact switch and a second normal open contact switch of the circuit breaker are respectively connected with the fire line output circuit and the zero line output circuit of the card plug-in type kilowatt hour meter. The electrification signal output end of the card plug-in type kilowatt hour meter is connected with the close control voltage signal input end of the circuit breaker. When electric cost is used up, the IN end of the circuit breaker has no voltage signal and the circuit breaker cuts off after a time delay of 0.2-2s. After a user has purchased electricity and inserted an IC card into the card plug-in type kilowatt hour meter, the card plug-in type kilowatt hour meter outputs a close control voltage signal, the IN end of the circuit breaker gets the voltage signal and the circuit breaker can be switched on, and the user gets electricity. The circuit breaker provided by the invention has overloading and short circuit protection characteristics, thereby bringing about low failure rate and good power supply reliability during use.
Description
technical field [0001] The invention relates to a control device used in conjunction with a card-inserted watt-hour meter. Background technique [0002] At present, the plug-in watt-hour meter has begun to be popularized and used, which greatly facilitates the real-time control of the power consumption of users by the power supply department. However, there are a series of problems in the reliability of the control device used in conjunction with the card-type watt-hour meter, which is not conducive to the comprehensive promotion and use of the card-type watt-hour meter. [0003] Chinese patent documents CN 2393218 and CN1139817 are both a circuit breaker for plug-in type watt-hour meter system, except including: upper and lower connection terminals, contact device, arc extinguishing device, circuit breaking device, bimetal element and magnetic tripping device , also includes a control circuit and a heat-sensitive ceramic element; the control circuit is connected to the hea...
Claims
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IPC IPC(8): G07F15/00H03K17/292
Inventor 黄朝波黄章武包志舟
Owner 人民电器集团仪器仪表有限公司