Sonel MZC-310S High Current Loop Impedance Meter

With the use of the Sonel MZC-310S meter, it is possible to test short circuit loop impedance in consumer networks as well as in distribution networks protected with high-current circuit breakers. At the same time as measuring the impedance, the shock and contact voltages can be measured. Where the condition for automatic power off cannot be satisfied, the facility may be authorised to operate based on the voltage criterion.

The application of the four-wire method and the flow of the measuring current in the 150/280 A pulse determine the high precision of the performed test. This single device hides a multitude of measurement capabilities, making it appreciated by specialists in many fields. The meter complies with the requirements specified in the EN 61557 standard.

Key features

• 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.
• Measurement with a current of 23 A at 230 V, maximum 42 A at 440 V with resolution 0,01 Ω.
• Measurements in installations with rated voltages: 220/380 V and 230/400 V and frequencies 45…65 Hz.
• Ability to perform measurements in short circuit system: phase-phase, phase-PE, phase-N.
• Differentiation between the phase voltage and the inter-phase voltage while calculating the short circuit current.
• Ability to change the length of test lead (measurement with 2p method).
• 4p (four-pole) method, test leads do not require calibration (measurement with current up to 280 A).
• Measurement of resistance (R_S) and reactance (X_S) components.
• Touch voltage and touch shock voltage measurement with resistor 1 kΩ.
• AC voltage measurement in range 0…440 V.
• Frequency measurement 45.0...65.0 Hz.
• Memory of 990 measurement results, ability to transfer the data to a PC via RS-232.
• Power supply: rechargeable battery (5x LR14).

What's Included?

• High Current Loop Impedance Meter
• Double-wire test lead 3 m (10 / 25 A)
• Test lead 1.2 m (banana plugs) black / yellow
• Pin probe 1 kV (banana socket) black / yellow
• 2x Kelvin clamp, 1 kV, 25 A
• 4x crocodile clip 1 kV 32 A black
• 2x high-current pin probe 1 kV (banana sockets)
• RS-232 serial transmission cable
• Unisonel hanging straps
• L1 carrying case
• 5x LR14 1.5 V alkaline battery
• Factory calibration certificate