MZC-310S
Index: WMGBMZC310
Loop Meter
Description
Technical Specification
Files
  • Description
    The MZC310S is a professional portable meter for testing electrical installations with over-current circuit breakers. The instrument measures short-circuit L-PE, L-N and L-L loop and prospective short-circuit loop current. A measurements can be done either with low testing current (up to 42 A) with 2-pole method or high testing current (up to 280 A) with 4-pole method that enables measurements with very high accuracy and resolution.
     
    The results can be stored in the internal memory and send to a computer via serial interface.
  • Technical Specification

    Measurement of very low short circuit loop impedances (with resolution 0,1 mΩ) with a current of 150 A at 230 V; maximum 280 A at 440 V or measurement with a current of 23 A at 230 V; maximum 42 A at 440 V.

    • measurements in installations with rated voltages between: 220/380 V and 230/400 V and frequencies 45...65 Hz,
    • ability to perform measurements in short circuit system: phase-phase, phase-protective, phase-neutral,
    • differentiation between the phase voltage and the inter-phase voltage while calculating the shortcircuit current,
    • Ability to change the length of test leads (measurement 23/42 A),
    • four-pole method, test leads do not require calibration (measurement 150/280 A).

    Touch voltage and touch shock voltage measurement (with resistor 1 kΩ).

    AC voltage measurement in range 0...440 V.

    Memory for 999 measurement results with an ability to transfer the data to a PC.

    Meter meets the requirements of the standard EN 61557.

    Electric security:

    • type of insulation: double, according to EN 61010 - 1 and IEC 61557
    • measurement category: CAT IV 300 V acc. to EN 61010 - 1
    • protection class acc. to EN 60529: IP20


    Other technical data:

    • power supply alkaline batteries LR14 (C) (5 pcs.)
    • resistor limiting the current:
    • for measurement 4p: 1,5 Ω
    • for measurement 2p: 10 Ω
    • number of short circuit loop measurements (alkaline batteries): min. 2000 (4/min.)
    • temperature coefficient: ±0,1% of measured value /°C


    Rated operational conditions:

    • operating temperature: 0...+40°C

     

    Voltages measurement (True RMS)

    Range Resolution Accuracy
    0...440 V 1 V ±(2% m.v. + 2 digits)
    • frequency range: DC, 45...65 Hz
    • input impedance of the voltmeter: >200 kΩ

     

    Frequency measurement (for voltages within the range 50...440 V)

    Range Resolution Accuracy
    45,0...65,0 Hz 0,1 Hz ±(0,1% m.v. + 1 digits)

     

    Short circuit loop parameters measurement using high current (4p, Imax=280 A)

    High-current of measurement of short circuit loop impedance ZS:
    measuring range according to IEC61557: 7,2 mΩ...1999 mΩ

    Range Resolution Accuracy
    0...199,9 mΩ 0,1 mΩ ±(2% m.v. + 2 mΩ)
    200...1999 mΩ 1 mΩ ±(2% m.v. + 2 mΩ)

     

    Short circuit resistance RS and reactance XS display range

    Range Resolution Accuracy
    0...199,9 mΩ 0,1 mΩ ±(2% m.v. + 2 mΩ) impedance reading for a particular measurement
    200...1999 mΩ 1 mΩ ±(2% m.v. + 2 mΩ) impedance reading for a particular measurement

     

    Prospective short circuit loop current
    measuring range according to IEC 61557:

    • for Un = 230 V 115,0 A...32,0 kA
    • for Un = 400 V 200 A...55,7 kA
    Range Resolution Accuracy
    115,0...199,9 A 0,1 A accuracy of the current indication computed, respectively, with the use of resistance measurement
    200...1999 A 1 A accuracy of the current indication computed, respectively, with the use of resistance measurement
    2,00...19,99 kA 0,01 kA accuracy of the current indication computed, respectively, with the use of resistance measurement
    20,0...199,9 kA 0,1 kA accuracy of the current indication computed, respectively, with the use of resistance measurement
    200 kA...* 1 kA accuracy of the current indication computed, respectively, with the use of resistance measurement
    • * 230 kA for UL-N
    • 400 kA for UL-L

     

    Measurement of short circuit loop using standard current (2p, Imax=42 A)

    Touch voltage measurement UST (shock voltage UT)

    Range Resolution Accuracy
    0...100 V 1 V ±(10% m.v. + 2 digits)

     

    Short circuit loop impedance ZS measurement:
    measuring range according to IEC61557: 0,13 Ω...199,9 Ω for 1,2 m long test leads

    Range Resolution Accuracy
    0,00...19,99 Ω 0,01 Ω ±(2% m.v. + 3 digits)
    20,0...199,9 Ω 0,1 Ω ±(3% m.v. + 3 digits)

     

    Short circuit resistance RS and reactance XS display range

    Range Resolution Accuracy
    0,00...19,99 Ω 0,01 Ω ±(2% m.v. + 3 digits) impedance reading for a particular measurement
    20,0...199,9 Ω 0,1 Ω ±(2% m.v. + 3 digits) impedance reading for a particular measurement

     

    Prospective short circuit loop current

    Range Resolution Accuracy
    1,150...1,999 A 0,001 A accuracy of the current indication computed, respectively, with the use of resistance measurement
    2,00...19,99 A 0,01 A accuracy of the current indication computed, respectively, with the use of resistance measurement
    20,0...199,9 A 0,1 A accuracy of the current indication computed, respectively, with the use of resistance measurement
    200...1999 A 1 A accuracy of the current indication computed, respectively, with the use of resistance measurement
    2,00...19,99 kA 0,01 kA accuracy of the current indication computed, respectively, with the use of resistance measurement
    20,0...40,0 kA 0,1 kA accuracy of the current indication computed, respectively, with the use of resistance measurement

    „m.v.” - measured value

  • Files

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