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1、 Overview
The rail mounted electric energy meter is suitable for installation in compact electric energy metering cabinets or cabinets. It adopts MODBUS interface, which facilitates the connection with PLC and other equipment to upload electric energy related data, and facilitates the automation management of electricity consumption. An automatic meter reading system can also be formed by communicating with a microcomputer through an RS485 communication interface. Rail mounted energy meters are the latest generation of miniaturized intelligent energy meters launched in recent years. This series of electric energy meters has the advantages of small size and easy installation, as well as extremely high accuracy and good anti electromagnetic interference performance, fully meeting the relevant technical requirements of level 1 and level 2 electronic energy meters in the national standards DL/T614-1997 and GB/T17215-2002. The model of single-phase rail mounted electric energy meter is DDS2026-N, which adopts LCD display. The enhanced type can be set for clock, rate period, etc., and has pulse output function;
2、 Technical indicators
Project indicators
DDS2026-N single-phase energy meter DTS2026-N three-phase energy meter
Accuracy level active level 1 active level 1 (optional 0.5 level)
Reference voltage Un single-phase: 220V three-phase four wire: 2 * 220V/380V
Current specifications 1.5 (6) A, 5 (20) A, 10 (40) A, 20 (80) A 1.5 (6) A, 5 (20) A, 10 (40) A, 20 (80) A
Participation frequency 50-60HZ 50-60HZ
Normal operating voltage range: 0.7UN-1.2UN Normal operating voltage: 0.7UN-1.2UN
Working temperature -10~+45 ℃ Working temperature -10~+45 ℃
Power consumption voltage circuit: ≤ 5VA
Current circuit:<4VA/phase (at maximum current) Voltage circuit: ≤ 5VA
Current circuit:<4VA/phase (at maximum current)
Clock accuracy ≤ 0.5S/D ≤ 0.5S/D
Pulse output parameters Pulse width: 80ms ± 20ms Passive output, external current:+5V~24V Pulse width: 80ms ± 20ms Passive output, external current:+5V~24V
Communication protocol MODBUS-RTU (other customizable) MODBUS-RTU (other customizable)
Dimensions 76 * 89 * 74 (mm) 126 * 89 * 74 (mm)
3、 Functional Features
DDS2026-N single-phase rail energy meter
1. Measurement: 1.1 Measurement of positive and negative active energy, with automatic recognition and indication of power direction
1.2 Total, peak, flat, and valley electrical energy shall be stored separately and saved in the corresponding storage units
1.3 The electricity meter can store data for 3 months, and the default frozen transfer date for electricity is 24:00 at the end of the month (frozen at the end of the month)
1.4 After power failure, all stored data will not be lost and can be maintained for more than 10 years
2 Clock and Time Rate:
2.1 Clock error within 0.5S/day, with automatic switching between calendar, timing, and leap year functions
2.2 Programmable setting of peak, flat, and valley rates, with 8 time periods per day and a minimum interval of 1 minute between time periods
3 Display:
3.1-inch wide temperature LCD display
3.2 It can display the effective values of voltage and current in real time, and can achieve data rotation display with a cycle display time of 4 seconds
3.3 Electric energy pulse indicated by red LED
3.4 Three rates are indicated by green LED during peak, off peak, and off peak periods
4 outputs:
4.1 Active energy pulse output, used for meter calibration and energy collection
5 Communication:
5.1 Used for parameter setting and meter reading
5.2 RS485 communication interface, MODBUS-RTU communication protocol
6 Programming:
6.1 Programming settings are performed through the upper computer
6.2 Time and Date Setting
6.3 Meter Address Setting
6.4 Rate Period Setting
6.5 Battery Bottom Zero Setting

Single phase outline drawing
6、 Wiring method
The rail mounted energy meter supports two wiring methods: primary connection (direct connection) and secondary connection (through current transformer CT connection).