I01�High-voltage�Components
2.�Important�Notes
12
The�following�graphic�shows�the�design�of�the�round�high-voltage�connector�on�the�high-voltage
cable.
Design�of�the�round�high-voltage�connector
Index
Explanation
1
High-voltage�cable
2
Actuation�points�on�locking�elements
3
Housing
4
Locking�element
5
Connection�1�for�bridge�in�the�connector
6
Connection�for�shielding
7
High-voltage�connection,�pin 2�(DC,�minus)
8
Mechanical�encoding
9
Connection�2�for�bridge�in�the�connector
10
High-voltage�connection,�pin 1�(DC,�plus)
The�bridge�in�the�high-voltage�connector�serves�for�electrical�safety.�The�signal�of�the�high-voltage
interlock�loop�runs�over�this�bridge�when�the�high-voltage�cable�is�connected�to�the�high-voltage
component.�For�the�connection�of�the�high-voltage�cable�to�the�EKK�and�to�the�electric�heating�the
voltage�supply�of�the�EKK�or�transmission�control�unit�runs�via�the�bridge.�If�one�of�the�circuits�is
interrupted,�this�also�results�in�an�automatic�interruption�to�the�current�flow�(returns�to�zero)�in�the
respective�high-voltage�cable.�As�the�two�contacts�of�the�bridge�opposite�the�high-voltage�contacts
advance,�this�measure�constitutes�protection�against�the�formation�of�an�electric�arc�when�removing
the�high-voltage�connector.
2.4.�Connections�for�potential�compensation�lines
The�safety�concept�of�the�high-voltage�system�includes�the�measurement�and�monitoring�of�the
isolation�resistance�of�the�high-voltage�cables�to�each�other�and�against�ground.�This�safety�function
is�performed�in�the�I01�of�the�SME�control�unit,�but�should�identify�isolation�faults�in�the�entire�high-
voltage�circuit.�For�this�purpose,�the�housing�of�all�high-voltage�components�must�be�connected
galvanically�to�ground.
