Single multi-function power meter power supply circuit

Now, most power supply sectors prevent the electric meter or human beings or the destructive power meter or human becomes due to the power meter or artificial dismissive, and have requested the newly mounted single-phase electric meter to withstand high pressure (such as 380V voltage). ) For a certain time (such as 4h) without damage, if the single-phase input circuit does not process, the input high pressure will cause the electric meter to be burned in a short time. As long as a suitable PTC thermistor overflow protection is connected in series in the transformer input, the external voltage is mainly added to the PTC thermistor, and the linear transformer can not be hot and damaged. In order to ensure that the actual AC input current of the thermistor does not occur, the actual AC input current of the reference power meter is selected, and 50% of the remaining amount is left, the temperature of the cache should be ≥80 ° C; at the highest operating temperature, the maximum load When working, the electric meter cannot be protected, and at the lowest operating temperature, when the input is added to 380V AC power, the PTC within the electricity table should protect the role in a short period of time, and ensure that the electric meter is not damaged, the circuit diagram is shown in Figure 4. . Figure 4 Single-Phase Multiple Function Power Meter Power Supply, Technology Area On Mu, the SiC, GaN, and Three Levels brought by Siqiang reach your efficiency. How to prevent switching power supply noise by using secondary output filters Ceramic vertical mount package (CVMP) welding precautions and layout Mathematical modeling and loop compensation design of DC-DC converters What are the commonly used benchmark regulated power?

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