Multifunctional and intelligent alternating current meter
A multi-function, electric meter technology, applied in the field of meters, can solve the problems of difficult use, large error, large energy consumption, etc., and achieve the effects of cost saving, raw material saving, and strong overload capacity.
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[0012] Such as figure 1 As shown, a multifunctional intelligent AC ammeter described in this embodiment is a multifunctional intelligent AC ammeter, which includes an input circuit 1 composed of an ACV-1 voltage module and an ACA-1 current module, an amplifier 2, and an ammeter measurement chip U2 forms the processing unit 3, the liquid crystal screen forms the display unit 4 and the 485 communication interface 5, the ACV-1 voltage module is composed of 10 sampling resistors 1-1 and a magnetic coupling voltage sensor 1-2; the ACA -1 current module adopts magnetic coupling current sensor 1-3, which has the characteristics of small internal resistance and strong overload capacity. The described one is composed of 10 sampling resistors 1-1 and a magnetic coupling voltage sensor 1-2, and five resistors 1-1 with a certain resistance value are respectively connected in series at the two input ends of the magnetic coupling voltage sensor 1-2. Has a strong overload capacity. The amp...
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