1. Brief Introduction
1.1 Main application & applicable range
DTSU666 series three phase four wire and DSSU666 series three phase three wire electronic
energy meter (din-rail) (hereinafter referred to as the “instrument”) is designed based on power
monitoring and energy metering demands for electric power system, communication industry,
construction industry, etc. as a new generation of intelligent instrument combining measurement and
communication function, mainly applied into the measurement and display for the electric parameters
in the electric circuit including three voltage, three current, active power, reactive power, frequency,
positive& negative energy, four-quadrant energy, etc. Adopting the standard DIN35mm din rail
mounting and modular design, it is characterized with small volume, easy installation and easy
networking, widely applied into the internal energy monitoring and assessment for industrial and
mining enterprises, hotels, schools, large public buildings.
Complied standards:
IEC 61010-1:2010《Safety requirements for electrical equipment for measurement，control and
laboratory use Part1:General requirements》
IEC 61326-1:2013 《Electrical equipment for measurement，control and laboratory use –EMC
requirements Part1:General requirements》
MODUS-RTU protocol.
1.2 Product Features
1) Characterized with positive and reverse active power, combined active power, combined
reactive power, four quadrant reactive power metering and storage function with combination
mode character can be set.
2) RS485 communication function with communication protocol complied with Modbus-RTU.
3) Adopting the standard DIN35mm din rail mounting and modular design, it is characterized
with small volume, easy installation and easy networking.
4) The update speed of active power is better than 120ms.
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