The ADL400 Series Three-Phase Electric Meter is a compact, accurate energy monitoring solution designed for use in low-voltage three-phase electrical systems. It measures both active and reactive energy (forward and reverse), offers harmonic analysis up to the 31st order, and features programmable settings via its LCD interface. Supporting both direct and CT connections, the ADL400 is ideal for smart energy monitoring in commercial buildings, industrial facilities, and energy management systems. Integrated RS485 Modbus communication enables seamless connectivity to BMS, EMS, and SCADA platforms.

Technical Specifications

Feature	Specification
Model	ADL400
Voltage Input	3×100V / 3×380V / 3×57.7/100V / 3×220/380V
Current Input	Direct: 80A / CT: 6A
Frequency	45–65Hz, accuracy ±0.2%
Power Consumption	<10VA per phase
Impedance	>2MΩ (voltage input)
Accuracy (Energy)	Active: Class 0.5s, Reactive: Class 2
Accuracy (Other)	Voltage/Current/Frequency: ±0.2%
Display	LCD, 12-digit readout, 3 keys
Pulse Output	1000 or 10000 imp/kWh (active energy)
Communication Interface	RS485 + Infrared
Communication Protocol	Modbus-RTU
Clock Accuracy	≤0.5s/day
Pulse Width	80 ± 20 ms
Harmonic Measurement	2nd to 31st order
Installation	DIN 35mm rail
Wiring Options	3P3W and 3P4W; direct or via CT
Operating Temp.	-25°C to +55°C
Storage Temp.	-40°C to +70°C
Humidity	≤95% RH (non-condensing)
Altitude	≤2000m

Functions

• Three-phase voltage and current monitoring
• Active/reactive/apparent power and power factor measurement
• Energy metering with forward/reverse tracking
• Historical data storage for up to 48 months and 90 days
• Harmonic analysis (2nd–31st)
• Real-time pulse and RS485 Modbus communication
• LCD user interface with programming keys

Applications

• Commercial and industrial energy metering
• Power distribution monitoring in buildings
• Electrical panels in production plants
• Sub-metering in commercial facilities
• SCADA/BMS integrated smart energy systems

Manufacturer Information

Acrel Co., Ltd., established in 2003, is a high-tech enterprise specializing in energy efficiency management and electrical safety solutions. With a comprehensive product line ranging from cloud platform software to sensors, Acrel offers smart energy meters, power sensors, and protection devices. Their products are widely utilized across industries such as electric power, communications, rail transit, petrochemical, and construction. In 2012, Acrel was listed on the Growth Enterprise Market with the stock code 300286.SZ. The company is committed to delivering innovative and reliable energy management solutions to its global clientele.