Electric Meter External Circuit Breaker Technology Innovation and Breakthrough
2021-05-02
Smart meters as smart grid terminal, has gradually into our lives. According to statistics, China has completed the installation of about 258 million smart meters. There are still about 70 million new and replacement needs each year. Meter external Miniature Circuit Breaker is the key component to realize the intelligent charge control function with smart energy meter. The intelligent ammeter with relatively large rated current (> 60A) generally adopts the external Circuit Breaker to realize various fee control functions.
First, the appearance of miniature circuit breakers watt-hour meter
Currently, the charge control function used in the domestic prepaid meter is divided into two categories: semi-automatic and fully automatic:
The first is a semi-automatic, it is a shunt trip with miniature circuit breakers or relays, this product is the ordinary micro-circuit breaker with a micro-circuit breaker can be added to create an electromagnetic device or a separate relay. Arrears when the smart meter to send signals to the electromagnetic device coil control micro-circuit breaker tripping or relay action to achieve arrears automatic power-off function. However, this product can only be automatically de-energized after the arrears, and the professionals need to manually close the door after paying the fee. Although the power grid company has invested a huge manpower cost to maintain it, it still can not solve the timely problem of renewing the electricity. Greatly reduce the customer's electricity experience. At the same time the product also has the following shortcomings, one can not meet the requirements of the end of the charge-by-wire intelligent system; the second is due to the micro-circuit breaker installed in the electromagnetic device after the limited space, resulting in micro-circuit breaker N phase does not have abnormal Break protection.
The second is fully automatic, which in turn can be implemented by two devices:
One is the use of relay-type automatic reclosing, the main relay + electronic circuit board; and because the relay does not have the arc-breaking and breaking capacity, short-circuit protection can not be achieved, when it passes through a large current prone to contact welding, affecting the power supply System safety.
The second is assembled aerobics accessories automatic reclosing, the main body is miniature circuit breaker + electric accessories (split design, the handle outside the linkage). There is a bulky, sub-closing synchronization poor, poor reliability defects. The market general reclosing miniature circuit breakers, only the closing module on the 27-54mm, due to the large size, restricting the large amount of Oversea large scale meter box upgrade. If the re-design of the meter box, then the national power grid terminal meter fee control field will spend huge sums of money.
Second, the external energy meter miniature circuit breaker new technology
With the advancing of the construction of smart grid, the energy meter charge control system, as the basis of a large amount, is valued by the State Grid Corporation of China and South China Power Grid Corporation. In order to further improve the reliability of the power meter fee control system and ensure the safe and stable operation of the intelligent management and intelligent service of the power system, State Grid Corporation and China Southern Power Grid Company formulated the Technical Specifications for External Watt-hour Meter. In the future, the electric appliance specially developed FAR6-W external miniature circuit breaker (hereinafter referred to as FAR6-W) according to this standard.
The basic functions of FAR6-W are as follows: Reliable realization of arrearage automatic sub-gate power-off and payment auto-switch on and off, and precise feedback of closing, opening and fault status signals at the same time.
FAR6-W modular design, the structure is the drive module plus miniature circuit breakers. Drive module only 18mm width, single-phase plus N total width of 54mm, three-phase plus N total width of 90mm. In the industry the first breakthrough unipolar 18mm wide, the maximum rated current of 100A. Small size ensures that the FAR6-W can be easily installed in the existing standard measurement box.
The FAR6-W adopts the inner shaft transmission design, which ensures the synchronization, consistency and reliability of circuit breaker opening and closing. Drive module with manual (semi-automatic) and automatic selection function, which can effectively prevent the man-made closing power theft (that is, forcibly closed, the contact is not closed).
FAR6-W -25-60 ℃ for the temperature range, the extreme environment up to -40 ~ 70 ℃. So regardless of the summer heat in the south or the frigid winter in the north, the FAR6-W works reliably and offers more options for the mounting position of the meter box, either indoors or at ambient temperature. Larger outdoor.
FAR6-W watt-hour meter external circuit breaker in line with "GB10963.1 home and similar places overcurrent protection circuit breaker" standard, in line with the State Grid and the Southern Power Grid "Watt-hour meter external circuit breaker technical specifications," in line with China CQC Quality Certification Center " Meter External Circuit Breaker Specifications. "
Suzhou Future Electric Co., Ltd. in the various functions of low-voltage circuit breaker accessories, especially in the field of remote control (motor drive), focusing on 30 years, laid the leading position in the field of subdivision. (Successfully listed in the national share transfer system in 2015 with the stock code of 833054.) Rely on the leading technical team, leading innovation ability and leading technology (informationization and automation), take the lead in the industry to launch the meter external breaker, FAR6 -W series of products take the lead through the full 3C certification (certificate number), will meet the tens of millions of huge market demand gap.
KNB1-63 Mini Circuit breakers, also named as the air switch which have a short for arc extinguishing device. It is a switch role, and also is a automatic protection of low-voltage electrical distribution. Its role is equivalent to the combination of switch. Fuse. thermal relay and other electrical components. It mainly used for short circuit and overload protection. Generally, According to the poles, mini Circuit breaker can be divided into 1P , 1P+N , 2P, 3P and 4P.
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First Electrical Group Co., Ltd. http://www.zjmoldedcasecircuitbreaker.com