Description

Table of Contents

Overview of digital multifunction power meter

The multifunction & multifunctional power meter supports programmable measurement, display, digital communication and pulse transmission output.
It realizes power parameter measurement, energy metering, data display, collection and transmission.
Widely used in substation automation, distribution automation, intelligent buildings and enterprise power measurement, management and assessment.
It has 0.5-level measuring accuracy for voltage and current, with on-site LED display and remote RS-485 interface based on MODBUS-RTU protocol.

Multifunction Power Meter

Parameter Item	Specification
AC Voltage Sampling Range	0-400V; external voltage transformer required for sampling voltage over 400V
AC Current Sampling Range	0-5A; external current transformer required for sampling current over 5A
Harmonic Measurement Range	2nd to 31st order harmonics of phase voltage & phase current, range: 0.01%~99.99%
Total Harmonic Distortion (THD) Range	0.1%~999.9%
Metering Sampling Rate	1.0s per time
Harmonic Measurement Sampling Rate	0.5s per time
Metering Accuracy	±0.5%FS
Harmonic Measurement Accuracy	±0.05%FS
Display Mode	LED display
Current Loop Input Power Consumption	< 0.5VA
Voltage Loop Input Power Consumption	< 0.2VA
Working Power Supply	AC220V, AC/DC 89-265V; system power consumption < 0.3VA
Alarm Output	Independent relay output; contact capacity: 250Vac/5A, 30Vdc/5A
Transmission Output	4-20mA analog output (switchable between 4-20mA and 0-20mA); accuracy ±0.5%FS; load capacity <900Ω; common-source output
Communication Interface	RS485 serial communication, supporting MODBUS-RTU protocol
Digital Input	Passive dry contact, with optocoupler isolation
Electrostatic Discharge Immunity	Air discharge >8KV, Contact discharge >4KV
Surge Immunity	>4KV
Electrical Fast Transient Burst Immunity	>4KV
Power Frequency Withstand Voltage	>2KV

Meter Type	Main Measured Parameters	Signal Input	Typical Application
Single-phase Voltmeter	AC Voltage	Direct 0~400V / PT access	Low-voltage distribution cabinet
Single-phase Ammeter	AC Current	Direct 0~5A / CT access	Motor control cabinet
Single-phase Power/Energy Meter	Voltage, Current, Active Power, Energy	CT+PT	Civil power distribution
Three-phase Multifunction Power Meter	V, I, P, Q, kWh, 2~31st Harmonic, THD	CT+PT	MV switchgear, PV station, substation
Digital Power Factor Meter	Power Factor	CT+PT	Reactive power compensation cabinet

A: It measures AC voltage, current, power, energy, 2nd~31st harmonic and THD. External CT/PT is needed for signals exceeding 5A/400V.

A: Standard RS485 port with Modbus-RTU protocol; optional switchable 4–20mA/0–20mA analog transmission output.

A: AC220V or universal AC/DC 89~265V, low overall power consumption below 0.3VA.

A: Basic metering accuracy ±0.5%FS, harmonic accuracy ±0.05%FS.

A: Yes, independent relay alarm output, contact rating: 250VAC/5A, 30VDC/5A.

A: It passes strict EMC tests: air ESD＞8kV, contact ESD＞4kV, surge & EFT＞4kV, dielectric withstand＞2kV.

A: Widely fitted in switch cabinets, distribution boxes, photovoltaic and wind power projects.

xiao zhang – June 3, 2026

Compact digital meter precisely measures voltage, current and power parameters with clear digital readout. Low power consumption and robust anti-interference suit switchgear, PV and distribution cabinet installation.
Rated 5 out of 5

Jack – June 4, 2026

Protection logic is easy to customize with the provided software.

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