Phase Meter Electrical Training Equipment Vocational Training Equipment

MR507E Phase Meter Electrical Training Equipment Vocational Training Equipment

I.Product Overview
1.1 Overview
Phase meter is an electrical measuring instrument used to measure voltage, current and phase in three-phase AC circuits. It is widely used in power system, industrial enterprises, scientific research institutions and other fields for energy metering, phase monitoring, electrical equipment commissioning and other work. It can accurately measure the voltage and current amplitude in the circuit and the phase between each quantity, and can also measure single/three-phase power and power factor, frequency and other parameters, and can display the measurement results through the pointer, providing important data support for the operation management of the power system and the performance evaluation of the equipment.
1.2 Features
High-precision measurement: It uses precise mechanical structure and electronic components, has high measurement accuracy and stability, and can accurately measure parameters such as voltage, current and phase in the circuit.
Intuitive display: The pointer display is intuitive and clear, which is convenient for users to quickly read the measurement results. It is especially suitable for use in dim light or when the phase relationship needs to be quickly determined.
Easy operation: With a simple and easy-to-understand operation interface and clear indication marks, users can quickly get started without complex training, improving work efficiency.
Safe and reliable: The three voltage input channels are insulated and isolated from each other, and the three current channels are input by clamp-type current transformers. Measurements can be performed without disconnecting the circuit being measured. There is no need to directly contact the live circuit during measurement to ensure safe operation.
II.Working Principle

The working principle is based on AC sampling technology and phase difference measurement technology. When the voltage and current signals of the measured circuit are input to the phase meter, they are firstly subjected to voltage and current reduction processing by the voltage transformer and the current transformer to convert the high voltage and high current signals into low voltage and low current signals suitable for measurement. Then, these signals are respectively input into the voltage measurement circuit and the current measurement circuit of the phase meter, and the signals are sampled and conditioned by precise resistors, capacitors and other components to obtain analog signals proportional to the voltage and current. Next, the analog signal is converted into a digital signal by an analog-to-digital converter (ADC) and sent to the microprocessor for calculation and processing. Based on the voltage and current digital signals obtained by sampling, the microprocessor uses the phase difference calculation formula to calculate the phase difference between the two voltages, between the two currents, and between the voltage and the current, and displays the measurement results by the position of the pointer on the dial for the user to read and analyze.