Description of DDS522 single-phase electronic watt-hour meter of Weifang Haote Electric Branch of Wuzhou Mingzhu Co., Ltd.

◆ The product has few peripheral components, simple structure, small volume, light weight, low power consumption, high precision, wide load (up to 6 times), long service life, high reliability, convenient installation and complete specifications.

◆ It has the function of preventing current from stealing electricity in reverse direction.

◆ Photoelectric isolation pulse outputs detection signal, which is convenient for function expansion and used in centralized reading system.

◆ The product has built-in lightning protection and high-frequency electromagnetic field interference protection circuit.

DDS 686 (Ⅱ) —— Lightning protection, overvoltage protection and overcurrent protection

◆ It has all the characteristics of ordinary type.

◆ Lightning protection can reach hundreds of times.

◆ It can work under the overvoltage condition of1.9un..

◆ It can work in the overcurrent state of 10Ib.

DDS 686 (Ⅲ) —— Transformer Connection Type

◆ It has all the characteristics of ordinary type.

◆ The voltage and current circuits are separated, and a current transformer can be connected externally to expand the current range.

DDS 686 (Ⅳ) —— Anti-shunt Stealing Type

◆ It has all the characteristics of ordinary type.

◆ It has the function of preventing shunt electricity stealing and current reverse electricity stealing, and can indicate abnormal power (green LED is on).

◆ It has good magnetic shielding to prevent strong magnetic field interference, and the watt-hour meter counter has calibration function.

Quality guarantee date

Within 18 months from the delivery date of the electric energy meter, if it is found that the user meets the requirements of this manual and the manufacturer's lead seal is still intact, the manufacturer will repair or replace the electric energy meter free of charge.