Đồng hồ đo điện trở vòng Sonel MZC-310S

• 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: Đồng hồ đo điện trở vòng Sonel MZC-310S
- 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)

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

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

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

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

Short circuit resistance R_S and reactance X_S display range

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

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

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

Touch voltage measurement U_ST (shock voltage U_T)

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

Short circuit resistance R_S and reactance X_S display range

Prospective short circuit loop current