Measurement method. An insulation resistance test instrument shall be connected between the live parts and the ground connection. Then, the isolation resistance shall be measured. If the system has several voltage ranges (e.g. because of boost converter) in a galvanically connected circuit and some of the components cannot withstand the working voltage of the entire circuit, the isolation resistance between those components and the ground connection can be measured separately by applying at least half of their own working voltage with those component disconnected.
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