Sonel MZC 320S

The Sonel MZC 320S High Current Loop Impedance Meter is a professional-grade instrument designed for precise testing and measurement of electrical loop impedance in low-voltage networks. Engineered for electricians, maintenance teams, and testing professionals, this meter ensures reliable verification of circuit protection and safety compliance.

With its high-current injection capability, the MZC 320S accurately measures loop impedance, helping detect faults, verify earth connections, and ensure proper operation of protective devices. The meter features a clear digital display, intuitive interface, and rugged construction suitable for demanding industrial and field environments.

Key features:

High-current testing up to 320 A for accurate loop impedance measurement
Automatic calculation of prospective fault current (PFC)
Measurement of earth loop impedance for single-phase and three-phase circuits
Clear digital display with backlight for easy reading in low-light conditions
Portable, robust design for field use
Compliant with international safety standards (IEC/EN)

Whether used for routine maintenance, installation verification, or troubleshooting, the Sonel MZC 320S provides fast, accurate, and reliable measurements that professionals can depend on for electrical safety and compliance.

Specifications

1. Electrical Measurement

Loop Impedance Measurement: 0.00 Ω – 1999 Ω
Test Current: Up to 320 A (High Current Injection)
Voltage Range: 230 V AC (single-phase) / 400 V AC (three-phase)
Frequency: 50 Hz / 60 Hz
Prospective Fault Current (PFC): Automatic calculation based on measured impedance

2. Measurement Capabilities

Earth loop impedance for single-phase and three-phase circuits
Fault detection and verification of protective devices
Automatic and manual testing modes
Continuous measurement with display of real-time values

3. Display & Interface

Large digital display with backlight
Clear readout of impedance, current, and calculated fault current
Intuitive user interface for easy operation
LED indicators for test status and safety warnings

4. Safety & Compliance

Test category: CAT IV 300 V / CAT III 600 V
Overcurrent and short-circuit protection
Compliant with IEC/EN 61557 standard for electrical safety testing
Robust insulation and protective housing

5. Physical & Environmental

Dimensions: Approx. 250 × 150 × 90 mm
Weight: ~2.0 kg
Operating Temperature: -10°C to +50°C
Storage Temperature: -20°C to +70°C
Humidity: 0 – 95% non-condensing
Housing: Rugged, impact-resistant casing

6. Accessories

Test leads and clamps
Carrying case for portability
Instruction manual and calibration certificate
Optional software for data logging and reporting

Loop Impedance Tester

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