Reverse polarity protection describes the behaviour (function state and admissible fault descriptions) of the system in case of permanent reverse polarity of the battery connection. The reverse polarity is defined by the reverse polarity voltage ( <test-volt>), reverse polarity time ( <test-duration>) and testing temperature ( <test-temp>). Furthermore, the general design of the system or component interfaces is defined, e.g. the treatment of the interfaces which have a connection to ground or to the supply voltage outside the system, the protection of the connected components, the state of the outputs during reverse polarity, etc.
The description of the reverse polarity protection is valid for all electrical connections (there is no reference to any electrical connection). If there are different descriptions for some electrical connections, a further description of the reverse polarity protection is defined for each difference (with reference to the concerned connection).
In addition to the a.m. statements there can always be given additional specifications, e.g. the test set-up.
Figure 18: Structure of reverse polarity protection test
Example for content:
Representation example for reverse polarity protection
Denomination
|
Abbreviation
|
Min
|
Type
|
Max
|
Abs
|
Tol
|
Unit
|
|
Test voltage
|
UP
|
|
|
|
15,0
|
|
V
|
|
Test duration
|
tP
|
19
|
20
|
21
|
|
|
s
|
|
Test temperature
|
T
|
17
|
22
|
27
|
|
|
C
|
|
Operating state : switched off
Function state: B
Fault description: Output C2 activated
|