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Vacuum circuit breaker permanent magnet mechanism
PUBLISHER:Shanghai Moye Electric Co.,Ltd””RELEASE TIME:2017/7/13
With the development of technology, and now the older generation of ordinary type of vacuum circuit breakers are gradually out of the stage of history, a new generation of intelligent products are being replaced. The most important thing in the intelligent series is the addition of permanent magnet operation. This article technicians and we explain the so-called permanent magnet vacuum circuit breaker how a matter.
Permanent magnet mechanism uses a new intelligent phase selection vacuum switch structure. This structure is only one of the main moving parts, no mechanical off, locking device, less fault source, high reliability, and long life, generally more than 100,000 times, while controlling the closing phase, to achieve synchronous control , Thereby reducing the impact of over-voltage and surge on the system, reducing system protection inputs, improve the overall life of the system.
Circuit breaker based on permanent magnet mechanism using electromagnetic operation, permanent magnet to keep the way, very few components, the action process is simple, with its switch parts than the spring mechanism to reduce 80%, thus ensuring the reliability of operation and reduce the failure Rate, to avoid debugging, less maintenance, for its intelligent, automated control laid the foundation. So many domestic manufacturers competing to develop and produce, to create a wide range of products, the formation of a small boom. Due to a variety of products, uneven quality control, it is necessary to some problems: some users in the coal body, such as the disclosure of capacitor energy storage components such as quality problems, electric points, closing unreliable and other issues, no manual Sub-gate device or hand is not complete, in the case of power failure can not repair and debugging, etc., the existence of these problems, to the user caused some bad effects, that intelligent integrated permanent magnet vacuum switch technology is not yet mature, Large-scale promotion time has not yet arrived. Seriously affected the further development of this technology.
Permanent magnet mechanism has the function
1 closing
Power system normal work, through the operating mechanism to close the circuit breaker, then the circuit flows through the working current, the working current is generally below 400A, the current is small, easier to close. However, when the grid short circuit accident occurs, the circuit short-circuit current up to 40kA, or even greater. Circuit breaker to withstand the electric power of up to several thousand cattle or more, the operating mechanism must overcome such a huge electric power, in order to close the circuit breaker.
2 Keep closing
In order to reduce the overall size of the circuit breaker and reduce energy consumption, the closing coil is designed for short-term work, only in a very short period of time through the closing current, if the power is too long, will burn the closing coil. This requires the operating mechanism in the closing coil power failure, the circuit breaker can still remain in the closing position.
3 gate
Circuit breaker sub-gate means to break the circuit, to appear arc, breaking the greater the current, the more difficult to extinguish the arc, the more severe the working conditions. When the short circuit fault occurs, the short circuit current is much larger than the normal load current, because the system occurs when the short circuit, the system circuit performance for the inductive circuit, so when the AC voltage zero, the circuit breaker static and dynamic contact moment, Current can not be mutated, there will be transient recovery voltage. In order to achieve the purpose of breaking the circuit, the operating mechanism must provide a certain opening speed, especially just split speed.
Mainstream permanent magnet vacuum circuit breaker products
VS1-12
Fixed installation, can be installed in the XGN2-12, DXG and other fixed switchgear, but also independent fixed installation, as a separate switch control equipment used; out of the installation, installed in the KYN28 (48) -12, KYN44-12 and other home Switchgear, especially because the installation size and VS1 (ZN63A) consistent, but also for some old switchgear transformation.
ZW32-12
Installed in the XGN15-12 ring network cabinet and cable distribution box, as the main switch to use, can break off the short-circuit fault current, reduce the impact of the area. Widely used in Shandong, Hebei and other places power supply system of the opening and closing stations, cable and other power distribution system.
Permanent magnet mechanism uses a new intelligent phase selection vacuum switch structure. This structure is only one of the main moving parts, no mechanical off, locking device, less fault source, high reliability, and long life, generally more than 100,000 times, while controlling the closing phase, to achieve synchronous control , Thereby reducing the impact of over-voltage and surge on the system, reducing system protection inputs, improve the overall life of the system.
Circuit breaker based on permanent magnet mechanism using electromagnetic operation, permanent magnet to keep the way, very few components, the action process is simple, with its switch parts than the spring mechanism to reduce 80%, thus ensuring the reliability of operation and reduce the failure Rate, to avoid debugging, less maintenance, for its intelligent, automated control laid the foundation. So many domestic manufacturers competing to develop and produce, to create a wide range of products, the formation of a small boom. Due to a variety of products, uneven quality control, it is necessary to some problems: some users in the coal body, such as the disclosure of capacitor energy storage components such as quality problems, electric points, closing unreliable and other issues, no manual Sub-gate device or hand is not complete, in the case of power failure can not repair and debugging, etc., the existence of these problems, to the user caused some bad effects, that intelligent integrated permanent magnet vacuum switch technology is not yet mature, Large-scale promotion time has not yet arrived. Seriously affected the further development of this technology.
Permanent magnet mechanism has the function
1 closing
Power system normal work, through the operating mechanism to close the circuit breaker, then the circuit flows through the working current, the working current is generally below 400A, the current is small, easier to close. However, when the grid short circuit accident occurs, the circuit short-circuit current up to 40kA, or even greater. Circuit breaker to withstand the electric power of up to several thousand cattle or more, the operating mechanism must overcome such a huge electric power, in order to close the circuit breaker.
2 Keep closing
In order to reduce the overall size of the circuit breaker and reduce energy consumption, the closing coil is designed for short-term work, only in a very short period of time through the closing current, if the power is too long, will burn the closing coil. This requires the operating mechanism in the closing coil power failure, the circuit breaker can still remain in the closing position.
3 gate
Circuit breaker sub-gate means to break the circuit, to appear arc, breaking the greater the current, the more difficult to extinguish the arc, the more severe the working conditions. When the short circuit fault occurs, the short circuit current is much larger than the normal load current, because the system occurs when the short circuit, the system circuit performance for the inductive circuit, so when the AC voltage zero, the circuit breaker static and dynamic contact moment, Current can not be mutated, there will be transient recovery voltage. In order to achieve the purpose of breaking the circuit, the operating mechanism must provide a certain opening speed, especially just split speed.
Mainstream permanent magnet vacuum circuit breaker products
VS1-12
Fixed installation, can be installed in the XGN2-12, DXG and other fixed switchgear, but also independent fixed installation, as a separate switch control equipment used; out of the installation, installed in the KYN28 (48) -12, KYN44-12 and other home Switchgear, especially because the installation size and VS1 (ZN63A) consistent, but also for some old switchgear transformation.
ZW32-12
Installed in the XGN15-12 ring network cabinet and cable distribution box, as the main switch to use, can break off the short-circuit fault current, reduce the impact of the area. Widely used in Shandong, Hebei and other places power supply system of the opening and closing stations, cable and other power distribution system.