Switching power circuit for three-phase intelligent electric energy meter
A technology of switching power supply circuit and smart energy meter, which is applied in the direction of electrical components, output power conversion device, irreversible AC power input conversion to DC power output, etc., can solve low-level problems, and achieve simple and reliable, strong cost Advantages and Effects of Practical Value
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[0021] Such as figure 1 with 2 As shown, a switching power supply circuit for a three-phase smart energy meter of the present invention includes a distributed load regulating device 1, a half-wave rectification and filtering device 2, a neutral line, overvoltage and electromagnetic interference monitoring and protection device 4, and The load control device 5, the distributed load regulating device 1 is powered by the three-phase four-wire power supply 6, the distributed load regulating device 1 is connected to one end of the half-wave rectifying and filtering device 2, and the other end of the half-wave rectifying and filtering device 2 outputs to the DC / DC converter 3, DC / DC converter 3 is connected with electric energy meter functional circuit 7, one end of neutral line, overvoltage and electromagnetic interference monitoring and protection device 4 is connected with half-wave rectification and filtering device 2 and DC / DC converter 3, The other end of the neutral line, o...
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