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In the direct vicinity of transformers or in transformer stations, where the circuits are equipped with a high current protection (fuse-links with the rating of several hundred amperes, motor circuit breakers), fault currents may reach several hundreds of kilo-amps. Measurement of fault loop impedance in such networks requires a high-current meter, which is capable of measuring ZS values at the level of single milliohms.
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The MZC-310S 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 impedance and prospective short circuit loop current. Measurements can be done either with low measurement current (up to 42A) with 2-pole method or high measurement current (up to 280A) 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.
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The Sonel MZC-306R meter is fully Network Rail PADS approved under the Network Rail Certificate of Acceptance PA05/07453 and catalogue number 0092/010414. Approved for use in testing on the Network Rail 650V electrical system Signal Power feeders to test the fault loop impedance measurements. The Sonel MZC-306R measures Ik sometimes called PSCC (Prospective Short Circuit Current).
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The Sonel MZC-306 enables measurements in various types of networks up to 750V AC. The meter is invaluable for engineers who work on a variety of electrical work in low-voltage areas, such as solar, renewables, homes and buildings, public facilities, workshops and factories. The resolution of the measurement result is 0.01 Ω and the meter can also perform measurements in networks protected by RCD circuit breakers. The casing of the MZC-306 meter is IP54 rated, which provides a resistance to mechanical damage with the cover of the device also being able to be set at several positions to enable easy and comfortable transport and use of the meter.
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The Sonel MPI-540-PV is an advanced prosumer multifuction tester created in particular for measuring parameters of photovoltaic installations. With the meter it is possible to carry out a whole range of tests on the DC and AC sides in accordance with the guidelines of the EN 62446 standard as outlined in Section 712 of amendment 2 of the 18th Edition Wiring Regulations. The Sonel MPI-540-PV can also be used to carry out all measurements to determine the safety condition of domestic as well as industrial electrical installations.
