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Smart Prepayment Meter
DDSY178 BS Single Phase STS Keypad Prepayment Meter

The DDSY178 is a single-phase electricity meter for residential usage, which complies with IEC62055-41, IEC 62052-11, 62053-21, 62053-23, 62056-46, 62056-53, 62056-61 and 62056-62 international standards. DDS1079 is designed for the measurement of active and reactive energy, time-of-use metering, data recording, alarm detection, as well as the control switch function for connecting or disconnecting user’s power.

  • Ø Standard Features

    STS standard, an open safety transmission standard.

    Payment information is transmitted by TOKEN code, extensible various payment means;

    Class 1

    Include internal Real Time Clock (RTC).

    Include nonvolatile memory for register data and load profile.

    Switching power supply.

    Meter cover removal detection.

    Include Time-of-Use (TOU), demand, load profile features.

    Include self testing, event log features.

    Include removable backup battery.

    Ø Communication Features

    Optical port, complies with IEC 62056-21 for two-way communication.

    Include RJ-45 connector for 2-wire RS-485 communication.

    Optional accessories: PLC/RF module.

    Disconnect switch. (Direct connected meter has disconnect switch, CT connected meter hasnt.)

    LCD backlight.

  •  

    Reference Voltage

    230V

    Current Rating

    5(100)A

    Maximum Current

    100A

    Reference Frequency

    50Hz

    Variation in frequency

    ±5%

    Accuracy Class

    1 for active,2 for reactive

    Starting Current

    0.4%Ibfor active

    Measuring Elements

    Two

    Operating Voltage

    0.8Vref1.1Vref

    Meter constant

    1000imp/kWh

    1000imp/kVarh

    Alarm function

    Alarm indicator light

    Power Consumption

    <1.5W(8VA)

    Test for Immunity to Electrostatic Discharge

    (ESD)

    8kV(Contact ESD ) , 15kV(Air ESD )

    Fast Transient Burst Test

    4kV

    A.C. High Voltage Test

    4kV

    Impulse Voltage Test

    6kV

    Lightning Protection

    4kV(between phase and neutral)

    Protocol

    DLMS

    Communication

    Optical, RS 485,PLC/RF

    Environmental Temperature

    Operation range:-1060

    Limit range for storage and transport:-1070

    Relative Humidity

    85%

    Waterproof

    IP54

    Service Life

    10 years 


Contact

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