APM520 Multifunction Network Power Meter

Application:

1）Comprehensive three-phase power monitoring for distribution and energy management
2）Measures and records real-time demand and maximum demand for peak-demand analysis
3）Supports energy metering, harmonics, unbalance and other power quality monitoring
4）Suitable for factories, industrial parks, commercial buildings, data centers, PV/ESS systems and switchgear

Basic Parameters:

1）Demand: three-phase current plus active, reactive and apparent power
2）Rated input: 57.7/100 V, 63.5/110 V, 230/400 V, 400/690 V; 1 A or 5 A
3）Accuracy: voltage/current 0.2%; active power 0.5%; active energy Class 0.5S, optional 0.2S
4）Communication: RS485 Modbus-RTU / DL/T645; Ethernet and wireless communication optional
5）Size: 96 × 96 mm panel; 88 × 88 mm cut-out

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Information

Parameter

Function

Download

Characteristic

Communication
RS485, Modbus-RTU / DL/T645-2007
Ethernet, Modbus-TCP, 2nd communication, WiFi, LoRa and 4G optional

Display
128×128 dot-matrix LCD with white LED backlight
56×60 mm visible area with electrical parameter and power quality display

Rated U and l

66/115 V, 230/400 V, 277/480 V, 400/690 V

AC 1 A / 5 A
External CT Secondary Input

General

APM520 is a 96 mm panel-mounted multifunction network power meter designed for comprehensive electrical measurement, energy metering, demand monitoring and power quality analysis. It supports three-phase three-wire and three-phase four-wire systems and is suitable for industrial power distribution, data centers, photovoltaic systems, energy storage systems and other critical power monitoring applications.

Function

Accuracy

Voltage & Current 0.2%
Active Power 0.5%
Reactive Power 1%
Active Energy Class 0.5S, Class 0.2S optional

Frequency

45–65 Hz

Power Quality

Voltage and current unbalance
Voltage and current phase angle
Voltage and current THD
2nd–63rd individual harmonics
Voltage crest factor and current K-factor
Interharmonics, flicker and fault waveform recording optional

Energy Measurement

Active, reactive and apparent energy
Four-quadrant energy
Current and power demand
Maximum demand with timestamp
Maximum / minimum value recording
Multi-tariff energy optional

Communication

RS485 / Modbus-RTU
Ethernet / Modbus-TCP, 2nd communication, WiFi, LoRa, 4G optional

Input & Output

4DI + 2DO + 2 Energy Pulse Outputs
Additional 4DI + 2DO, 2-channel Analog Output optional
Relay Output AC 250V/3A, DC 30V/3A

Extended Monitoring

4-channel NTC Temperature Measurement
1-channel Leakage Current Measurement
Optional

Auxiliary Power Supply

AC 85–265V / DC 100–350V
Power Consumption ≤15VA

Protection Degree

Front Panel IP54
IP65 optional

Environment

Operating Temperature -25°C to +70°C
Storage Temperature -40°C to +85°C
Relative Humidity ≤95%, non-condensing
Altitude ≤2500m

Wiring

Installation

Typical connection

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Parameter	Specification
Power Network	3-phase 3-wire / 3-phase 4-wire
Display	128×128 dot-matrix LCD, white LED backlight
Visible Area	56 × 60 mm
Frequency	45–65 Hz
Rated Voltage	AC 3×57.7/100V, 3×63.5/110V, 3×230/400V, 3×400/690V
Rated Current	AC 3×1(1.2)A / AC 3×5(6)A
Current Connection	External CT
Voltage / Current Accuracy	0.2%
Harmonic Accuracy	1%
Frequency Accuracy	±0.02 Hz
Active Power Accuracy	0.5%
Reactive Power Accuracy	1%
Active Energy Accuracy	Class 0.5S; Class 0.2S optional
Switch Input	4DI standard
Relay Output	2DO; AC 250V/3A, DC 30V/3A
Energy Pulse Output	2EP
Standard Communication	RS485 / Modbus-RTU / DL/T645-2007
Optional Communication	Ethernet / Modbus-TCP, 2C, WiFi, LoRa, 4G
Auxiliary Power	AC 85–265V / DC 100–350V
Power Consumption	≤15VA
Operating Temperature	-25°C to +70°C
Storage Temperature	-40°C to +85°C
Relative Humidity	≤95%, non-condensing
Altitude	≤2500m
Front Protection	IP54; IP65 optional
Panel Size	96 × 96 mm
Housing Size	86.5 × 86.5 mm
Depth	77.8 mm
Cut-out Size	88 × 88 mm

Function	APM520
Full electrical parameter measurement	Standard
Four-quadrant energy / phase energy / apparent energy	Standard
Demand & maximum demand	Standard
Extreme value statistics	Standard
Voltage / current unbalance	Standard
Voltage / current phase angle	Standard
Voltage / current THD	Standard
2nd–63rd individual harmonics	Standard
Voltage crest factor / current K-factor	Standard
Voltage & current waveform	Standard
Event record	Standard
Alarm record	Standard
4DI + 2DO	Standard
2 Energy Pulse Outputs	Standard
RS485 / Modbus-RTU	Standard
DL/T645-2007	Standard
Ethernet / Modbus-TCP	Optional
Extended 2nd Communication (2C)	Optional
Additional 4DI + 2DO	Optional
2-channel Analog Output	Optional
Multi-tariff Energy	Optional (F)
4-channel NTC Temperature Measurement	Optional (T)
1-channel Leakage Current Measurement	Optional (L)
Interharmonics / Flicker	Optional (S)
Fault Waveform Recording	Optional (S)
WiFi	Optional
LoRa	Optional
4G	Optional