Sonel MZC-310S 回路阻抗测试仪

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 42A) with 2-pole method or high testing current (up to 280A) 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.
 
Detail

   MZC-310S Technical Specifications

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  • Measurement of very low short circuit loop impedances (with resolution 0,1mΩ) with a current of 150A at 230V; maximum 280A at 440V or measurement with a current of 23A at 230V; maximum 42A at 440V.
    - measurements in installations with rated voltages between: 220/380V and 230/400V and frequencies 45...65Hz,
    - 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 23/42A),
    - four-pole method, test leads do not require calibration (measurement 150/280A).
  • Touch voltage and touch shock voltage measurement (with resistor 1kΩ).
  • AC voltage measurement in range 0...440V.
  • 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 300V 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: 1,5Ω 
   for measurement 2p: 10Ω
- 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...440V 1V ±(2% m.v. + 2 digits)

 

· frequency range: DC, 45...65Hz
·  input impedance of the voltmeter: >200kΩ

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

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

 

 

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

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

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

Short circuit resistance RS and reactance XS display range

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

Prospective short circuit loop current
measuring range according to IEC 61557:
for Un = 230V   115,0A...32,0kA
for Un = 400V   200A...55,7kA 

Range Resolution Accuracy
115,0...199,9A 0,1A accuracy of the current
indication computed,
respectively,
with the use of resistance
measurement
200...1999A 1A
2,00...19,99kA 0,01kA
20,0...199,9kA 0,1kA
200kA...* 1kA

* 230 kA for UL-N
   400 kA for UL-L 

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

Touch voltage measurement UST (shock voltage UT)

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

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

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

Short circuit resistance RS and reactance XS display range

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

 

 

Prospective short circuit loop current

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

„m.v.” - measured value

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