I. Overview

The DDSF1332 electronic single-phase multi rate energy meter is designed using advanced energy metering chips and reliable MCU circuits. It is manufactured using digital processing technology and advanced SMT production processes, and is an internationally advanced level energy meter. The DDSF1332 electronic single-phase multi rate energy meter can record the electricity consumed by users in different time periods according to the set multiple rate parameters. Set parameters and read/write data to the electricity meter locally or remotely through an infrared programmer or RS485 interface. Establish long-distance power parameter collection through RS485 data network. Users can display relevant parameters in the electricity meter through the LCD screen.

All parameters and performance indicators fully comply with the following technical standards:

GB/T17215-2002 "Static AC Active Energy Meters of Class 1 and 2";

GB/T15284-2002 "Special Requirements for Multi Rate Energy Meters";

DL/T614-1997 "Multifunctional Energy Meter";

DL/T645-1997 "Communication Protocol for Multi functional Electricity Meter";

Comply with the technical specifications and communication protocols of the power company regarding electronic single-phase multi rate energy meters.

2、 Specifications and main technical indicators

2.1 Rated voltage: 220V

2.2 Rated frequency: 50Hz

2.3 Basic current: 520A, 1040A, 1060A

2.4 Meter constant: Refer to the corresponding nameplate markings.

2.5 Accuracy level: Level 1, Level 2

2.6 Starting current: 0.4Ib (1.0 level), 0.5Ib (2.0 level)

2.7 Stealth: With anti creep logic design, the voltage circuit is rated at 115, and when there is no current in the current circuit, the meter does not generate more than one pulse output.

2.8 Clock Parameters

Clock accuracy (daily error): ≤ 0.5s (23 ℃) Battery capacity: ≥ 1Ah Data retention time after power outage: ≥ 10 years

2.9 Voltage Range

Normal operating voltage: 0.7Un~1.2Un

2.10 Power consumption (LCD)

Voltage line power consumption: ≤ 1.0W and 6VA

Current line power consumption: ≤ 1VA (under rated current conditions)

2.11 Basic Error

Basic error of load current power factor ()

0.05Ib Level 1 Level 2

±1.5±2.5

0.1Ib-Imax 1±1.0±2.0

0.1Ib 0.5 Sensory ± 1.5 ± 2.5

0.8 capacity ± 1.5——

0.2Ib Imax 0.5 Sensory ± 1.0 ± 2.0

0.8 Capacity ± 1.0——

2.12 Climate conditions

Normal operating temperature: -15 ℃ to+55 ℃

Extreme working temperature: -20 ℃ to+70 ℃

Storage and transportation temperature: -25 ℃ to+70 ℃

Humidity: ≥ 95 (diffused naturally)

2.13 Dimensions: 228.5mm × 144mm × 73mm

2.14 Weight: Approximately 0.8kg

2.15 Average lifespan: ≥ 10 years

3、 Working principle

Figure 1 Block diagram of the working principle of DDSF1332 electric meter

When the electric energy meter is working, the energy consumed by the user is converted into voltage and current signals, which are sampled separately by the sampling circuit,

Processed by the dedicated integrated circuit of the electric energy meter into a pulse signal proportional to the power consumption, the MCU records the power pulse and stores it.

Process and record the power consumption during the corresponding time period based on the content of the clock and time slot, and the LCD displays the parameters selected by the user in a cyclic manner

The stored information data can be transmitted through infrared meter reading machine or RS485 communication interface.

4、 Main functions

4.1 Electricity metering

Measure positive and negative active energy; (Reverse energy is accumulated based on forward energy), and power outage data is maintained for more than 10 years;

● Store energy data for each rate of electricity for four months, including this month; The data transfer boundary time is set to the automatic meter reading date.

4.2 Rates and Time Periods

Programmable setting of 4 rates, 9 time periods, and 2 annual time zones for time-sharing metering of electricity consumption; The minimum interval between time periods is 15 minutes, and the time period can be set to cross zero.

Equipped with a hardware clock circuit with built-in crystals and temperature compensation circuit. Automatically adjust time, date, and leap year automatic switching function within the effective time of 2099.

5、 Installation and use

5.1 The electric energy meter should be installed indoors or outdoors in a rainproof meter box, which should be fixed on a sturdy and fire-resistant wall,

It is recommended to install at a height of no less than 2 meters. There are no corrosive gases in the air.

5.2 The electric energy meter should be wired according to the wiring diagram on the terminal cover, preferably using copper wire or copper wire connectors, and all wiring screws should be tightened,

5.3 Electric Meter Appearance: Dimensions: Length x Width x Height=228.5mm x 144mm x 73mm

5.4 Wiring is shown in Figure 3.