MZC-320S
Index: WMGBMZC320
High-current loop impedance meter
Description
Technical Specification
Files
  • Description

    Measurement of very low short circuit loop impedances (with resolution 0,1 mΩ) with a current of 130 A at 230 V; maximum 300 A at 550 V or with a current 24 A at 230 V, maximum 30 A at 550 V (with resolution 0,01 Ω)

    • measurements in installations with rated voltages between: 110/190 V, 115/200 V, 127/220 V, 220/380 V, 230/400 V, 240/415 V i 290/500 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 short circuit current,
    • ability to change the length of test lead,
    • four-pole method, test leads do not require calibration (measurement with current 300 A).
    • Touch voltage and touch shock voltage measurement with resistor 1 kΩ).
    • AC voltage measurement in range 0...550V.
    • Memory of 999 measurement results with an ability to transfer the data to a PC
    • Ability to transmit date thru USB.
    • Meter meets the requirements of the standard EN 61557.
  • Technical Specification

    Voltage measurements (True RMS)

    Range Resolution Accuracy
    0...550 V 1 V ±(2% m.v. + 2 digits)
    •  frequency range: DC, 45...65 Hz
    •  input impedance of the voltmeter: >200 kΩ

    Frequency measurements (for voltages in range 95...550 V)

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

    Short circuit loop parameters measurement using high current (4p, Imax=300 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 R 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

    Short circuit current indication
    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
    • for Un = 500 V 250 A...69,4 kA
    Range Resolution Accuracy
    115,0...199,9 A 0,1 A Accuracy of the curren indication computed, respectively, with the use of resistance measurements
    200...1999 A 1 A Accuracy of the curren indication computed, respectively, with the use of resistance measurements
    2,00...19,99 kA 0,01 kA Accuracy of the curren indication computed, respectively, with the use of resistance measurements
    20,0...199,9 kA 0,1 kA Accuracy of the curren indication computed, respectively, with the use of resistance measurements
    200 kA...* 1 kA Accuracy of the curren indication computed, respectively, with the use of resistance measurements

    * 230 kA for UL-N
    400 kA for UL-L

    Short circuit loop parameters measurement using standards current (2p, Imax=30 A)

    Touch voltage measurements UST and 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 test leads length 1,2 m

    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. + 3digits) impedance reading for a particular measurement
    20,0...199,9 Ω 0,1 Ω ±(3% m.v. + 3 digits) impedance reading for a particular measurement

    Readings short circuit current

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

    „m.v.” - measured value.

    Electric security:

    • type of insulation: double, according to PN-EN 61010-1 and IEC 61557;
    • measurement category: IV 600 V acc. to PN-EN 61010-1;
    • protection class acc. PN-EN 60529: IP20 (IP67 with front cover closed);

    Other technical data:

    • power supply: build in Li-Ion 7,2 V/8,8 Ah
    • resistor limited the current:
      • for 4 pole method 4p: 1,8 Ω;
      • for two pole method 2p: 9,4 Ω for U≤253 V, 19 Ω for U>253 V,   
    • number of short circuit loop measurements: 2000 (4/min.),
    • temperature coefficient: ±0,1% measured value /°C;
    • dimensions: 390 mm x 310 mm x 170 mm;
    • weight: 6,6 kg

    Rated operational conditions:

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