The ADW350 Wireless Metering Meter is a compact and intelligent three-phase energy meter designed for accurate sub-item metering in low-voltage distribution systems. It supports real-time measurement of key electrical parameters and is equipped with RS485 Modbus-RTU, with optional NB-IoT and 4G wireless communication. The ADW350 supports flexible current sensing via external CTs or Hall effect sensors, and includes features such as harmonic monitoring, temperature measurement, digital inputs/outputs, and configurable alarms, making it an ideal solution for building automation, industrial energy metering, and smart grid projects.

Technical Specifications

Feature	Specification
Model	ADW350
Voltage Input	AC 3×57.7/100V, 3×220/380V, 3×380/660V; DC: 48V
Current Input	AC: 3×20(100)A; DC: 50A or 100A (via CT or Hall)
Power Supply	AC 85–265V / DC 48V (±20%)
Power Consumption	<5W
Measurement Accuracy	Active Energy: Class 0.5; Temperature: ±2°C
Frequency	50Hz
Display	LED + LCD (configurable)
Communication	RS485 (Modbus-RTU); Infrared; Optional NB-IoT, 4G
Pulse Output	AC: 400 imp/kWh; DC: 1600 imp/kWh
Digital Outputs (DO)	3 relay outputs (5A @ AC250V / DC30V)
Digital Inputs (DI)	Supports break/make signal collection with internal +12V
Harmonic Analysis	2nd to 31st harmonic order; THDv supported
Temperature Measurement	Range: -40°C to +100°C; Accuracy: ±2°C
Working Temperature	-20°C to +55°C
Storage Temperature	-40°C to +70°C
Humidity	≤95% RH, non-condensing
Altitude	≤2000m
Mounting	DIN-rail, panel embedded

Functions

• Real-time monitoring of three-phase voltage, current, power, and power factor
• Active energy metering with forward/reverse and total calculation
• Harmonic detection and THD monitoring for power quality insight
• RS485 Modbus communication for SCADA/EMS integration
• Optional NB-IoT and 4G connectivity for remote energy management
• Digital inputs for external signal tracking, relay outputs for control
• On-board temperature monitoring for transformer or switchgear diagnostics

Applications

• Distribution board sub-metering
• Building and facility-level energy audits
• Smart grid and utility energy monitoring
• Renewable energy (solar/BESS) metering
• Industrial plant and equipment-level metering
• Cloud-based energy reporting via NB/4G modules

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.