The ADF400L Series is a modular, multi-user energy meter designed for applications requiring centralized management of multiple circuits. It can simultaneously monitor up to 12 three-phase or 36 single-phase circuits through flexible combinations of direct and transformer access modules. Widely adopted in residential buildings, schools, industrial facilities, and enterprise campuses, the ADF400L offers precise measurement, programmable functionality, remote communication, and optional prepaid control, making it ideal for modern energy infrastructure.

Technical Specifications

Feature	Specification
Model	ADF400L-□H□S□D(Y)-□
Measurement Capacity	12 three-phase or 36 single-phase circuits
Input Voltage	3×220/380V or 3×57.7/100V
Input Current	3×1(6)A (CT access), 3×10(80)A (direct access)
Communication	Infrared, RS485 (Modbus), optional Ethernet
Digital Inputs/Outputs	Main module: 2DI/2DO; Transformer access: up to 4DI/4DO
Pulse Output	Per circuit: 1 active energy pulse
Pulse Constant	6400 imp/kWh (CT), 400 imp/kWh (direct)
Power Supply	AC/DC 85–265V or 3×220/380V
Power Consumption	≤10W
Measurement Accuracy	Active energy: Class 0.5s
Clock Accuracy	≤0.5s/day
Display	LCD, 8-digit segment with backlight
Mounting	DIN-rail (35mm), modular combination system
Operating Temperature	-20°C to +60°C
Storage Temperature	-30°C to +70°C
Humidity	≤95% RH, non-condensing
Altitude	≤2000m

Functions

• Active energy metering (forward/reverse)
• Reactive energy, apparent power, and power factor measurement
• Voltage/current/frequency and harmonic analysis (2nd to 31st)
• Real-time display of multi-circuit readings and event logging
• RS485 Modbus-RTU and optional TCP/IP for remote data acquisition
• DI/DO programmable logic for alarms or external control
• Prepaid energy management options via RF card or remote control
• Multi-tariff energy billing with detailed time period settings
• Support for mixed access: direct and CT-based measurement

Applications

• Apartment complexes and residential communities
• Educational campuses and dormitories
• Office buildings and commercial energy metering
• Industrial factories with sub-load distribution
• Centralized energy monitoring panels

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.