Three-phase three-wire smart energy meter

The XJ Instrument DSZ566 three-phase three-wire smart energy meter is an advanced intelligent energy metering product developed and manufactured by Henan XJ Instrument Co., Ltd.:

Basic Parameters

· Model: DSZ566.

· Basic Current: 1.5(6)A.

· Accuracy Class: 0.5S.

· Current Multiplier: 1.

· Display Method: LCD display.

· Frequency: 50Hz.

· Current: 6A.

· Power Supply Type: AC.

· Structure Type: Integrated.

· Wiring Method: Direct connection.

Working Principle

It consists of a measurement unit, data processing unit, communication unit, etc. The metering unit processes the sampled metering signals, obtains voltage and current values through integration and software filtering operations, calculates instantaneous power through multiplication, and then obtains energy by integrating instantaneous power. It can also calculate fundamental energy and voltage/current 2nd to 21st harmonic content data through Fourier transform. The main CPU unit serves as the core of the system, integrating data from various units to generate energy, demand, instantaneous measurement, and other data, completing functions such as time-of-use billing management, power event management, and user data display management.

Features

1. Comprehensive metering functions: Includes combined active energy, forward/reverse total active energy, forward/reverse rate-based active energy, forward phase-separated active energy, four-quadrant reactive energy, and other metering functions. It can also correlate energy, fundamental energy, harmonic energy, and apparent energy.

2. Flexible freeze functions: Supports settlement, instantaneous, scheduled, daily, hourly, and other freeze functions.

3. Convenient reset functions: Allows meter reset and demand reset.

4. Diverse output functions: Can output alarm signals, energy pulses, clock signals, time period switching, demand cycle signals, etc.

5. Complete time functions: Includes calendar, timing, leap year switching, two sets of rates, time period conversion, two sets of tiered electricity price conversion, broadcast time calibration, etc.

6. Comprehensive event recording: Records events such as undervoltage, phase loss, current loss, complete voltage loss, power failure, reset, programming, time calibration, reverse voltage phase sequence, meter cover opening, terminal cover opening, as well as voltage qualification rate.

7. Clear display functions: Supports automatic cycle display, button cycle display, and self-test display.

8. Powerful communication functions: Equipped with RS485 and infrared interfaces for easy data exchange with external devices.

9. Advanced measurement functions: Measures phase-separated voltage, phase-separated current, neutral current, total and phase-separated active power, total and phase-separated reactive power, total and phase-separated apparent power, total and phase-separated power factor, grid frequency, phase-separated phase angle, internal temperature, etc.

10. Harmonic analysis function: Analyzes 2nd to 21st harmonic content of voltage and current, as well as voltage waveform distortion rate.

11. Other practical functions: Supports power-off meter reading, power-off display, load recording, and is equipped with an auxiliary power supply.

Application Scenarios

Primarily used in three-phase three-wire power supply systems, suitable for three-phase symmetrical loads such as three-phase power transformers, three-phase motors, and other large industrial equipment and commercial facilities for energy metering.