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  • SDM630-Modbus 100A 3P3W/3P4W/1P2W Mutlifunction Power Analyser With RS485 Port modbus RTU

    • Measures kWh Kvarh, KW, Kvar, KVA, P, F, PF, Hz, dmd, V, A, etc.
    • Bi-directional measurement IMP & EXP
    • Two pulse outputs
    • RS485 Port modbus RTU
    • Din rail Mounted
    • 100A direct connection
    • Class 1.0 accuracy
    • 76mm width 4 modual
    • Description
    • Diagram
    • Manual Download

    The SDM630-Modbus measures and displays the characteristics of single phase two wires (1p2w), three phase three wires (3p3w,) and three phase four wires(3p4w) supplies, including voltage, frequency, current, power ,active and reactive energy, imported or exported. Energy is measured in terms of kWh, kVArh. Maximum demand current can be measured over preset periods of up to 60 minutes. In order to measure energy, the unit requires voltage and current inputs in addition to the supply required to power the product.
    SDM630-Modbus supports max. 100A direct connection, saves the cost and avoid the trouble to connect external CTs, giving the unit a cost-effective and easy operation. Built-in interfaces provides pulse and RS485 Modbus RTU outputs. Configuration is password protected.

    Measured Parameters
    The unit can monitor and display the following parameters of a single phase two wire(1p2w), three phase three wire(3p3w) or four phase four wire(3p4w) supply.

     Voltage and Current
    Phase to neutral voltages 100 to 289V a.c. (not for 3p3w supplies)
    Voltages between phases 173 to 500V a.c. (3p supplies only)
    Percentage total voltage harmonic distortion (THD%) for each phase to N ( not for 3p3w supplies)
    Percentage voltage THD% between phases (three phase supplies only)
    Current THD% for each phase

     Power factor and Frequency and Max. Demand
    Frequency in Hz
    Instantaneous power:
       Power 0 to 99999 W
    Reactive Power 0 to 99999 VAr
    Volt-amps 0 to 99999 VA
    Maximum demanded power since last Demand reset Power factor
    Maximum neutral demand current, since the last Demand reset (for 3p4w supply only)

     Energy Measurements
    Imported active energy    0 to 999999.99 kWh
    Exported active energy     0 to 999999.99 kWh
    Imported reactive energy   0 to 999999.99 kVArh
    Exported reactive energy   0 to 999999.99 kVArh
    Total active energy        0 to 999999.99 kWh
    Total reactive energy      0 to 999999.99 kVArh

     Measured Inputs
    Voltage inputs through 4-way fixed connector with 25mm2 stranded wire capacity. single phase two wire(1p2w), three phase three wire(3p3w) or four phase four wire(3p4w) unbalanced. Line frequency measured from L1 voltage or L3 voltage.

    Voltage                     0·5% of range maximum
    Current                     0·5% of nominal
    Frequency                   0·2% of mid-frequency
    Power factor                 1% of unity (0.01)
    Active power (W)             ±1% of range maximum
    Reactive power (VAr)          ±1% of range maximum
    Apparent power (VA)          ±1% of range maximum
    Active energy (Wh)            Class 1 IEC 62053-21
    Reactive energy (VARh)        ±1% of range maximum
    Total harmonic distortion       1% up to 31st harmonic
    Temperature co-efficient       Voltage and current = 0.013%/°C typical  
                                   Active energy = 0·018%/°C, typical
    Response time to step input    1s, typical, to >99% of final reading, at 50 Hz.
     Interfaces for External Monitoring
    Three interfaces are provided:
    an RS485 communication channel that can be programmed for Modbus RTU protocol
    an Pulse output(Pulse 1) indicating real-time measured energy.(configurable)
    an Pulse output(Pulse 2) 400imp/kWh    
    The Modbus configuration (Baud rate etc.) and the pulse output assignments (kW/kVArh, import/export etc.) are configured through the Set-up screens.

     Pulse Output
    The unit provides two pulse outputs. Both pulse outputs are passive type.
    Pulse output 1 is configurable. The pulse output can be set to generate pulses to represent total / import/export kWh or kVarh.
    The pulse constant can be set to generate 1 pulse per:
    dFt = 2.5 Wh/VArh
    0.01 = 10 Wh/VArh
    0.1 = 100 Wh/VArh
    1 = 1 kWh/kVArh
    10 = 10 kWh/kVArh
    100 = 100 kWh/kVArh
    Pulse width: 200/100/60ms
    Pulse output 2 is non-configurable. It is fixed up with active kWh. The constant is 400imp/kWh.

     RS485 Output for Modbus RTU
    For Modbus RTU, the following RS485 communication parameters can be configured from the Set-up menu:
    Baud rate 2400, 4800, 9600, 19200, 38400
    Parity none (default)/odd/even
    Stop bits 1 or 2
    RS485 network address nnn – 3-digit number, 001 to 247
    Modbus? Word order Hi/Lo byte order is set automatically to normal or reverse. It cannot be configured from the set-up menu.

     Reference Conditions of Influence Quantities
    Influence Quantities are variables that affect measurement errors to a minor degree. Accuracy is verified under nominal value (within the specified tolerance) of these conditions.
    Ambient temperature               23°C ±1°C
    Input frequency                    50 or 60Hz ±2%
    Input waveform                    Sinusoidal (distortion factor < 0·005)
    Magnetic field of external origin       Terrestrial flux

    Operating temperature             -25°C to +55°C
    Storage temperature               -40°C to +70°C
    Relative humidity                  0 to 90%, non-condensing
    Altitude                          Up to 2000m
    Warm up time                     1 minute
    Vibration                         10Hz to 50Hz, IEC 60068-2-6, 2g