The Sonel MZC-304F is dedicated to performing measurements in single and multi-family buildings, office buildings, industrial plants and any other places equipped with low voltage electrical systems. In addition, the meter is intended for maintenance personnel working on objects, where fault currents reach 4.4kA (measured according to EN 61557). MZC-304F is also a great tool for checking circuits additionally protected by residual current devices.
Sonel MZC-304F
Description
The Sonel MZC-304F compact short circuit loop impedance meter
The Sonel MZC-304F is one of the smallest instruments available on the market intended for short circuit loop impedance measurements in 230/400V networks and continuity of protective and equipotential connections measurements. The MZC-304F meter performs short circuit loop measurements with a resolution of 0.01 Ω, also in the case of measurements in networks protected with RCD switches. With a backlit keyboard and display, the device can be used even in low light. The device has a sealed casing with IP67 protection, which is characterised by excellent resistance and ensures smooth operation even under adverse environmental conditions.
The device meets the requirements set out in standard EN 61557.
Capabilities
- Fault loop impedance measurement with 0.01 Ω resolution.
- Low-current impedance measurement in circuits protected by RCD ≥ 30mA with 0.01 Ω resolution (range of 180…270V)
- Operates in networks with voltages 220/380V, 230V/400V, 240/415V (operating range 180…460V)
- Operating voltage range: 180…270V (for ZL-PE and ZL-N) and 180…460V (for ZL-L).
- Maximum measuring current: 7.6A for 230V (3×10 ms), 13.3A for 400V (3×10 ms).
- Operating frequency 45…65 Hz
- Calculation of Ik fault current.
- Measurement with swapped L and N conductors.
- Measurement of resistance (RS) and reactance (XS) components.
- Low-voltage measurement of continuity of circuit and resistance.
Additional features
- Contact electrode – quick testing of proper connection of PE conductor.
- Voltage measurement 0…500V.
- Frequency measurement 45.0…65.0Hz.
- Memory of 990 measurement results, ability to transfer the data to a PC via Bluetooth.
- Power supply: batteries (4 x LR14) or rechargeable batteries (4 x NiMH).
Applications
The Sonel MZC-304F is dedicated to performing measurements in single and multi-family buildings, office buildings, industrial plants and any other places equipped with low voltage electrical systems. In addition, the meter is intended for maintenance personnel working on objects, where fault currents reach 4.4kA (measured according to EN 61557). MZC-304F is also a great tool for checking circuits additionally protected by residual current devices.
Technical Specification
| Measurement functions | Measurement range | Display range | Resolution | Accuracy |
|---|---|---|---|---|
| Voltage | 0 V…500 V | 0 V…500 V | from 0.1 V | from ±(2% m.v. + 2 digits) |
| Frequency | 45.0 Hz…65.0 Hz | 45.0 Hz…65.0 Hz | 0.1 Hz | ±(0.1% m.v. + 1 digit) |
| Short-circuit loop parameters | ||||
| 2p method – standard current measurement maximum current 13.3 A | from 0.13 Ω…1999 Ω acc. to EN 61557 | 0.00 Ω…1999 Ω | from 0.01 Ω | ±(5% m.v. + 3 digits) |
| 2p method – measurements without tripping RCDs | from 0.5 Ω…1999 Ω acc. to EN 61557 | 0.00 Ω…1999 Ω | from 0.01 Ω | from ±(6% m.v. + 5 digits) |
| Short-circuit current readings | ||||
| 2p method – standard current measurement | Calculated on the basis of test ZS ranges and rated voltages | 0.110 A…9999 A | from 0.001 A | Calculated on the basis of error for fault loop |
| 2p method – measurements without tripping RCDs | Calculated on the basis of test ZS ranges and rated voltages | 0.110 A…9999 A | from 0.001 A | Calculated on the basis of error for fault loop |
| Measurement of continuity of protective conductors and equipotential bonding | ||||
| Low-voltage measurement of continuity of circuit and resistance with ±200 mA current | 0.12 Ω…400 Ω acc. to EN 61557-4 | 0,00 Ω…400 Ω | from 0.01 Ω | ±(2% w.m. + 3 cyfry) |
| Measurement of resistance with low current | 0.0 Ω…1999 Ω | 0.0 Ω…1999 Ω | from 0.1 Ω | ±(3% w.m. + 3 cyfry) |
m.v. – measured value
