Liquid crystal display multifunction instrument for real time electric power monitoring system
A technology of liquid crystal display and power monitoring, applied in the direction of digital variable/waveform display, instrument, measuring electric variable, etc., can solve the problems of not really detecting harmonics, low precision, poor performance, etc., and achieve small engineering quantity and high precision High, simple wiring effect
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[0034] The circuit and usage method of the liquid crystal display multifunctional instrument used in the real-time power monitoring system of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0035] Such as figure 1 , figure 2 and image 3 As shown, a real-time power monitoring system uses a liquid crystal display multifunctional power meter, including a meter case 1, an LCD display 2 and a control button 3 arranged on the front side of the meter case 1, and a control button 3 arranged on the back side of the meter case 1 The upper and lower rows of connection terminals 4, 5 and the circuit board arranged in the casing. The control buttons 3 include a SET key, a left key, a right key and an Enter key.
[0036] image 3 Pin 12 in the upper row of terminal 4 is the live wire L of the power supply, pin 13 is the neutral wire N of the power supply, pin 11 is the ground wire Nc of the power supply, p...
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