Single Phase Meters
- Dedicated metering IC with SMT assembly
- EMC design for stable field operation
- Accuracy class 1.0 or 2.0
- Rated voltage 220V
- Low power consumption
- Easy installation
- IC card prepaid options
- Stepped-tariff and multi-tariff options
Product Overview
- Wanfang single-phase meters are used on 220V single-phase supplies. The range includes an electronic kWh meter, IC card prepaid meters with LED or LCD display, a stepped-tariff meter and a multi-tariff meter.
- Prepaid models use a standard IC card. One meter works with one card. The meter can show remaining energy and total consumption. When remaining energy is low, the meter can alarm. When the load is too high, the meter can disconnect and then restore power.
- Common current ratings in this range include 5(20)A, 5(30)A, 5(40)A, 10(40)A, 15(60)A, 20(80)A and 30(100)A, depending on the model.
| Model | Function | Display | Prepaid | What is different |
|---|---|---|---|---|
| DDS550 Electronic | kWh metering | — | No | Postpaid metering only |
| Type I 4-digit | Prepaid | 4-digit LED | Yes | Two-screen remaining energy; reverse card shows total kWh; auto restore after disconnect |
| Type I 6-digit | Prepaid | 6-digit LED | Yes | Shows total kWh, remaining energy and purchase times |
| Type II 4-digit | Prepaid | 4-digit LED | Yes | Remaining / Total lamps; insert card to restore power |
| Type II LCD | Prepaid | LCD | Yes | Chinese-character LCD; insert card to restore power |
| DDSY550 Stepped-tariff | Prepaid + stepped tariff | — | Yes | 3 tariff steps; RS485 and IR reading |
| DDS550 Multi-tariff | TOU | — | — | 4 tariffs, 8 periods; backup battery |
DDS550 Electronic kWh Meter
Electronic active-energy meter for single-phase supplies. Postpaid metering. No prepaid disconnect function.
- Dedicated IC and SMT assembly
- EMC design, with EMC integrated as a module
- High accuracy
- High reliability
- Low power consumption
- Easy installation, with little restriction on mounting position
- Long service life
| Item | Specification |
|---|---|
| Accuracy | Class 1.0 / Class 2.0 |
| Rated voltage | 220V |
| Meter constant | 1600imp/kWh, 800imp/kWh |
| Current | 5(20)A, 5(30)A, 10(40)A, 15(60)A, 20(80)A |
| Frequency | 50Hz |
| Operating temperature | -30℃ to +45℃ |
| Relative humidity | ≤85% |
| Power consumption | <0.3W |
Prepaid Meter, Type I 4-digit
IC card prepaid meter. Remaining energy is shown on two screens. Insert the card in reverse to show total consumption.
- Dedicated IC and SMT assembly
- EMC design
- Standard IC card; low-power magnetic latching relay
- Remaining energy on two screens; reverse card insertion shows total consumption
- Buzzer alarm and power-off alarm; power is restored about 5 minutes after disconnect
- Overload disconnect; power is restored about 3 minutes later
- One meter, one card
| Item | Specification |
|---|---|
| Accuracy | Class 1.0 / Class 2.0 |
| Rated voltage | 220V |
| Meter constant | 1600imp/kWh, 800imp/kWh |
| Current | 5(40)A, 10(40)A, 15(60)A, 20(80)A |
| Frequency | 50Hz |
| Operating temperature | -30℃ to +40℃ |
| Relative humidity | ≤85% |
| Power consumption | <0.3W |
Prepaid Meter, Type I 6-digit
IC card prepaid meter. The display can show total consumption, remaining energy and the number of purchases.
- Dedicated IC and SMT assembly
- EMC design
- Standard IC card; low-power magnetic latching relay
- Shows total consumption, remaining energy and purchase times
- Buzzer alarm and power-off alarm; power is restored about 5 minutes after disconnect
- Overload disconnect; power is restored about 3 minutes later
- One meter, one card
| Item | Specification |
|---|---|
| Accuracy | Class 1.0 / Class 2.0 |
| Rated voltage | 220V |
| Meter constant | 1600imp/kWh, 800imp/kWh |
| Current | 5(40)A, 10(40)A, 15(60)A, 20(80)A |
| Frequency | 50Hz |
| Operating temperature | -30℃ to +40℃ |
| Relative humidity | ≤85% |
| Power consumption | <0.3W |
Prepaid Meter, Type II 4-digit
IC card prepaid meter. The Remaining lamp shows remaining energy on two screens. The Total lamp shows total consumption on two screens.
- Dedicated IC and SMT assembly
- EMC design
- Standard IC card; low-power magnetic latching relay
- Remaining / Total lamps switch the display
- LED flashing alarm and power-off alarm; insert the card to restore power after disconnect
- Overload disconnect; power is restored about 3 minutes later
- One meter, one card
| Item | Specification |
|---|---|
| Accuracy | Class 1.0 / Class 2.0 |
| Rated voltage | 220V |
| Meter constant | 1600imp/kWh, 800imp/kWh |
| Current | 5(40)A, 10(40)A, 15(60)A, 20(80)A |
| Frequency | 50Hz |
| Operating temperature | -30℃ to +40℃ |
| Relative humidity | ≤85% |
| Power consumption | <0.3W |
Prepaid Meter, Type II LCD
IC card prepaid meter with LCD. Total consumption and remaining energy are shown in the meters.
- Dedicated IC and SMT assembly
- EMC design
- Standard IC card; low-power magnetic latching relay
- LCD shows total consumption and remaining energy in Chinese characters
- Flashing alarm and power-off alarm; insert the card to restore power after disconnect
- Overload disconnect; power is restored about 3 minutes later
- One meter, one card
| Item | Specification |
|---|---|
| Accuracy | Class 1.0 / Class 2.0 |
| Rated voltage | 220V |
| Meter constant | 1600imp/kWh, 800imp/kWh |
| Current | 5(40)A, 10(40)A, 15(60)A, 20(80)A |
| Frequency | 50Hz |
| Operating temperature | -30℃ to +40℃ |
| Relative humidity | ≤85% |
| Power consumption | <0.3W |
DDSY550 Stepped-Tariff Meter
Single-phase stepped-tariff meter with IC card prepaid function. Three tariff steps can be set. When consumption reaches the set value, the meter switches to the next tariff. RS485 and infrared interfaces are provided for centralized reading.
- Dedicated IC and SMT assembly
- EMC design
- Standard IC card; low-power magnetic latching relay
- Functions cover prepaid use by the consumer and management by the utility
- RS485 and IR interfaces for automatic centralized reading
- Three stepped tariffs; the meter switches tariff by consumption
| Item | Specification |
|---|---|
| Accuracy | Class 1.0 / Class 2.0 |
| Rated voltage | 220V |
| Meter constant | 1600imp/kWh |
| Current | 1.5(6)A, 2.5(20)A, 5(20)A, 10(40)A, 15(60)A, 20(80)A, 30(100)A |
| Frequency | 50Hz / 60Hz |
| Operating temperature | -30℃ to +40℃ |
| Relative humidity | ≤85% |
| Power consumption | <0.3W |
DDS550 Multi-Tariff Meter
Single-phase multi-tariff meter. Four tariffs and eight time periods can be set. A backup battery keeps the meter working after a power outage.
- Dedicated IC and SMT assembly
- EMC design
- Four tariffs and eight time periods
- Backup battery for operation after power outage
| Item | Specification |
|---|---|
| Accuracy | Class 1.0 / Class 2.0 |
| Rated voltage | 220V |
| Frequency | 50Hz |
| Current | 5(20)A, 5(30)A, 10(40)A, 15(60)A, 20(80)A |
| Meter constant | 1600imp/kWh, 800imp/kWh |
| Power consumption | <1W |
| Weight | About 0.7kg |
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