The main technical features of ordinary multi-user smart meters are:

1. The electric meter adopts advanced metering and control chips (industrial grade), modular structure design, and strong anti-interference ability.

2. The meter box has a small volume, with regular and neat internal wiring that meets the requirements of power distribution. It is easy to install, maintain, and upgrade.

3. The communication circuit of the electric meter adopts lightning protection circuit, and the signal adopts photoelectric isolation. The communication circuit is separated from other circuits of the electric meter for processing, which can greatly reduce the damage of lightning strikes to the electric meter.

4. The interface of the electric energy signal acquisition module adopts a computer specific interface, which has undergone special processing to ensure reliable signal transmission.

5. The measurement circuit and communication/display circuit adopt a dual CPU mechanism, with one CPU responsible for measurement and the other for communication, display, and indication. Communication does not affect measurement.

6. Galvanized shielding plates are used to isolate the internal strong and weak electricity, which can reduce the interference of strong electricity on weak electricity signals.

7. The electric meter adopts a dedicated three-phase energy metering chip, which has a short measurement cycle, high accuracy, stable performance, long service life, and effectively steals electricity.

8. The internal power supply is three-phase, but the power supply is out of phase, and the electricity meter is working as usual.

9. The incoming terminal of the electric meter adopts dedicated wiring terminals, which have strong current carrying capacity and are convenient for on-site construction.

10. Data * *, various data parameters of the electricity meter are encrypted using algorithms to ensure data * *.

11. It can simultaneously measure and detect 36 households (single-phase) or 12 households (three-phase), as well as any combination of single and three-phase for households below 36.

Main technical indicators:

Rated voltage: 3 * 220/380v

Working voltage range: AC180~260V

Calibration current: 15 (60) A

Pulse constant: 3200 imp/kWh

Accuracy constant: Level 2.0

Measurement division: 0.1 degrees

Data protection: Data will be retained for more than 10 years after a power outage.

Meter reading method and system composition:

1. Direct reading meter reading: DDSH1703 multi-user energy meter.

2. Infrared meter reading: DDSH1703 multi-user energy meter; Infrared meter reader; Computer and management software.

3. Networked meter reading: DDSH1703 multi-user energy meter; Infrared meter reader (used to number electric energy meters); RSVVP

Type shielded twisted pair cable; Dataset reader; Computer and management software.

External dimensions: