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- Thông số Specs Details Overview Components Packages Resources Additional Modules Complementary products Architecture Tools Benefits Features Customer Ordering
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
