General introduction
The TOMZN Three Phase Volt Current Frequency Multi-function Meter (3P4L) is a sophisticated digital monitoring device designed to provide precise and real-time measurements of electrical parameters in three-phase power systems. Engineered for versatility, this meter supports both AC and DC auxiliary power supplies within the 85-265V range, making it adaptable to various industrial, commercial, and institutional electrical infrastructures. Its primary function as a digital multimeter (V-I-Hz) focuses on measuring and displaying three-phase voltage, three-phase current, and frequency, while also offering advanced features such as tracking maximum and minimum values of voltage and current, and recording the maximum demand value of current. This combination of basic measurement capabilities and enhanced monitoring functions ensures that users can maintain full visibility of their power system's performance, enabling proactive maintenance and efficient energy management.
Digital multimeter (V-I-Hz) are is used to measure and display three phase voltage, three phase current and frequency in power system.It supplys the view functions of max.and min.value of voltage and current and the max.demand value of current.
Technical parameters
1.Measuring range(can overload 1.2 times continuously)
Voltage
Direct measurement:AC 100V,220V/380V or 500V
Current:
Direct measurement: AC 1A or 5A
External current transformer: AC */1A or */5
Frequency: 45~65Hz
2.Accuracy: class 0.5
3.Sampling rate: 1.5 times/s
4. input circuit power consumption: <0.5VA/phase
5.Display resolution: voltage max. 0.1V, current max.0.001A, frequency 0.01Hz
6.Auxiliary power supply: AC220V ±15%, 50/60Hz,<3VA
7.Working environment: places which is free of gas corruption with
temperature:-10~50℃,humidity:<85%RH
Audited Supplier 
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