Multifunctional and intelligent alternating current meter

Abstract

The invention discloses a multifunctional and intelligent alternating current meter which comprises an input loop composed by an ACV-1 voltage module and an ACA-1 current module, an amplifier, a processing unit composed by an electric meter measuring chip U2, a display unit composed by a liquid crystal display and a 485 communication interface, wherein the ACV-1 voltage module consists of 10 sampling resistors and a magnetic coupling voltage sensor; and the ACA-1 current module adopts a magnetic coupling current sensor. The multifunctional and intelligent alternating current meter can simultaneously measure eight parameters of the alternating current instantaneous value, the alternating voltage instantaneous value, the alternating current effective value, the alternating voltage effectivevalue, the active power, the reactive power, the power factor and the frequency, realizes one meter with multiple purposes and has stronger overload capacity and obvious energy-saving effect.

Description

technical field [0001] The invention relates to an instrument, in particular to a multifunctional intelligent alternating current meter. Background technique [0002] At present, six meters such as AC ammeter, AC voltmeter, active power meter, reactive power meter, power factor meter, and frequency meter are mostly used in the industry to measure the instantaneous value of AC current, the effective value of AC current, the instantaneous value of AC voltage, and the AC voltage. RMS voltage, active power, reactive power, power factor, frequency and other eight commonly used parameters, and the internal resistance of the current AC ammeter is usually above 50 ohms, the error is large when measuring small currents, and the energy consumption is large. Also, because the current coil is usually above 50Ω, the error is large when measuring low power, and the energy consumption is large. The power factor meter usually cannot measure -1~0~+1 in all directions, especially for low powe...

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Problems solved by technology

[0002] At present, six meters such as AC ammeter, AC voltmeter, active power meter, reactive power meter, power factor meter, and frequency meter are mostly used in the industry to measure the instantaneous value of AC current, the effective value of AC current, the instantaneous value of AC voltage, and the AC voltage. RMS voltage, active power, reactive power, power factor, frequency and other eight commonly used parameters, and the internal resistance of the current AC ammeter is usually above 50 ohms, the error is large when measuring small currents, and the energy consumption is large. Also, because the current coil is usually above 50Ω, the error is large when measuring low power, and the energy consumption is large. The power factor meter usually cannot measure -1~0~+1 in all directions, especially for low power factor meters (below 0.2). Usually a low power factor meter is used, which makes it difficult to use

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