| 2.1.1. |
Measurement instrument An isolation resistance test instrument capable of applying a DC voltage higher than the working voltage of the high voltage bus shall be used. |
a0c0 |
| 2.1.2. |
Measurement method An insulator resistance test instrument shall be connected between the live parts and the electrical chassis. Then, the isolation resistance shall be measured by applying a DC voltage at least half of the working voltage of the high voltage bus. If the system has several voltage ranges (e.g. because of boost converter) in 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 electrical chassis can be measured separately by applying at least half of their own working voltage with those component disconnected. |
a0c0 |