13
Technical data
and start-up
PDU254
3.5
Safety concept for vehicle installation
INFORMATION
This safety concept is a recommendation of the company BRUSA Elektronik AG and is a general
requirement for the safe operation of electric vehicles!
3.5.1
Principle of operation Interlock
The interlock switch (1) is closed if the corresponding interlock condition of each devices is met (closed service
cover, plugged HV connections ...). The interlock evaluation of the PDU switches the 12V supply voltage (2) of the
HV contactors (4) in the battery if the interlock circuit is closed. The emergency stop switch (3) also interrupts the
12V supply voltage of the HV contactors (4). The second interlock (5) of the line insulation guard interrupts the
interlock circuit, if a fault in the HV- insulation is detected.
