Huawei DDSU666-H Energy Meter (1-Phase, 100 A)

The Huawei DDSU666-H is a single-phase energy meter designed for DIN35 rail mounting, supporting current measurement up to 100 A. The device features Class 1 measurement accuracy and a built-in RS485 interface with the Modbus-RTU protocol.

The Huawei DDSU666-H energy meter is a measuring device designed for single-phase installations (1P2W). It allows voltage measurement in the range of 176 V AC to 288 V AC and current up to 100 A using an external current transformer. The device is equipped with an LCD display, which facilitates direct reading of operating parameters. The total power consumption of the meter is below 0.8 W, reducing energy losses in the measuring system.

Key features

• Single-phase connection system (1P2W)
• Class 1 energy measurement accuracy (±1% error)
• Built-in LCD display for data reading
• Communication via RS485 interface (Modbus-RTU protocol)
• Includes a 100 A / 40 mA current transformer with a 5 m cable

Technical data

Input voltage (phase)	176 - 288 V AC
Current measurement range	0 - 100 A
Connection type	1P2W
Power consumption	< 0.8 W
Mounting	DIN35 rail
Communication interface	RS485 (Modbus-RTU, 9600 bps)
Operating temperature	-25 °C to 60 °C
Dimensions (H x W x D)	100 x 36 x 65.5 mm
Weight (with cables)	1.2 kg