The Megger MFT Series conform to EN61010 and have internal protection so fused test leads maybe waived, however in the event of testing in high energy installations it is recommended that fused leads are used.
It should be mentioned, when using fused test leads, if testing is conducted where the loop impedance is very low the resistance of the fuses will make a difference on the reading, also 500mA fuses may blow if testing across phases.
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