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简单介绍：
The MZC203 instruments are cost effective, portable and easy to usemeters for testing electrical installations with overcurrent circuit breakers. The instrument measures short-circuit (L-PE, L-N or LL
详情介绍：
The MZC203 instruments are cost effective, portable and easy to usemeters for testing electrical installations with overcurrent circuit breakers. The instrument measures short-circuit (L-PE, L-N or LL) loop resistance and prospective short-circuit loop current. The meter belongs to the MZC200 Series which consists of four types of instruments (MZC-200, MZC- 201, MZC-202 and MZC-203), each for different nominal line voltage.
voltmeter input resistance ≥200 kΩ
frequency 45...65Hz
***) the current dependent on the meter type and the rated voltage as follows:
MZC-200,201,202,203 Technical Specifications
- Short circuit loop resistance measurement:
- short circuit loop phase-to-phase(L-L) and phase-to-PE(N) measurement, neutral L-PE(N),
- automatic calculation of prospective short-circuit loop current,
- selectable test leads length 1,2m; 5m; 10m; 20m, - Test for coutinuity of protecting wires and equalizing connection.
- AC voltages measurement.
- Autoranging.
- Memory of the last measurement.
- AUTO-OFF function.
- Versions available:
- MZC-200: operate in mains voltage 220/380 V or 230/400 V,
- MZC-201: operate in mains voltage 290/500 V,
- MZC-202: operate in mains voltage 100/170 V,
- MZC-203: instrument, manufactured at special order for any chosen mains voltages, less than 500V, allows short circuit loop impedance measurement.
- Meter meets the requirements of the standard EN 61557.
The range of voltages in the short circuit loop resistance measurement:
- MZC-200: 180...440V
- MZC-201: 240...550V
- MZC-202: 85...190V
- MZC-203: upon request, up to 500V
rated frequency: 45...65 Hz
Short-circuit loop measurement resistor:
- MZC-200: 15 Ω
- MZC-201: 22 Ω
- MZC-202: 6,8 Ω
- MZC-203: selected according to the rated voltage
- MZC-200
for 230V: 15,3A (10ms)
for 400V: 26,7A (10ms) - MZC-201
for 290V: 13,2A (10ms)
for 500V: 22,7A (10ms) - MZC-202
for 100V: 14,7A (10ms)
for 170V: 25,0A (10ms) - MZC-203
selected according to the rated voltage
Short circuit loop resistance measurement:
measuring range according to IEC 61557 for voltages196...440V, and a phases angle 0...180°
and 1,2m long test leads: 0,24...200Ω
| Range | Resolution | Accuracy |
| 0,00...9,99Ω |
0,01 Ω | ±(2,5% m.v. + 5 digits) |
| 10,0...99,9Ω | 0,1 Ω | ±(2,5% m.v. + 3 digits) |
| 100...200Ω | 1 Ω | ±(3% m.v. + 3 digits) |
AC voltages measurement
| Meter type |
Range | Resolution | Accuracy |
| MZC-200 | 0...440 V | 1 V | ±(2% m.v. + 2 digits) |
| MZC-201 | 0...550 V | ||
| MZC-202 | 0...250 V | ||
| MZC-203 | (max. 500 V) |
frequency 45...65Hz
Prospective of the short circuit loop current (calculated Rs and Un)
| Range | Resolution | Accuracy |
| 0...9,99A | 0,01A | accuracy of the current indication computed, respectively, with the use of resistance measurement |
| 10,0...99,9A | 0,1A | |
| 100...999A | 1A | |
| 1,00...9,99kA | 0,01kA | |
| 10,0 ... ***kA | 0,1kA |
| Meter type | for UL-N | for UL-L |
| MZC-200 | 23,0 kA | 40,0 kA |
| MZC-201 | 29,0 kA | 50,0 kA |
| MZC-202 | 10,0 kA | 17,0 kA |
| MZC-203 | upon request | |
„m.v.” - measured value
