I01�High-voltage�Components
12.�Technical�Safety�Precautions
171
12.1.�High�voltage�interlock�loop
The�high-voltage�interlock�loop�is�used�to�protect�individuals�when�working�on�or�at�the�high-voltage
components.�Via�the�high-voltage�interlock�loop�it�is�identified�whether�one�or�several�high-voltage
plug�connections�have�been�disconnected.�If�a�high-voltage�plug�connection�has�been�disconnected,
the�entire�high-voltage�system�is�shut�down�automatically.�A�square�wave�signal�with�alternating
current�direction�is�sent�through�the�line�of�the�high-voltage�interlock�loop�by�the�battery�management
electronics�SME.�The�SME�and�the�electrical�machine�electronics�EME�evaluate�this�signal.
The�line�of�the�high-voltage�interlock�loop�runs�through�each�connector/plug�of�the�high-voltage
components,�which�are�able�to�generate�high�voltage.
