MZC-310S    

Catalog index: WMGBMZC310

Loop Meter

 

   

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.

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

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

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
2,00…19,99 kA 0,01 kA
20,0…199,9 kA 0,1 kA
200 kA…* 1 kA
  • * 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
20,0…199,9 A 0,1 A
200…1999 A 1 A
2,00…19,99 kA 0,01 kA
20,0…40,0 kA 0,1 kA

„m.v.” – measured value

Data Sheet                                      

User Manual                                   

Declarations of conformity          

 

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