Subaru impreza 2017, Owner'S Manual

Page: 175 / 786

where:
Un< Set value for step 1 and step 2
U Measured voltage
The type B curve is described as:
n
n
k
t
U U
U
2.0
480
0.055
32 0.5
×
= +
æ ö
< -
× -
ç ÷
<
è ø
EQUATION1432 V2 EN-US
(Equation 23)
The customer programmable curve can be created as:
p
n
n
k A
t D
U U
B C
U
é ù
ê ú
ê ú
×
= +
ê ú
æ ö ê ú
< -
× -
ç ÷
ê ú
<
è ø
ë û
EQUATION1433 V2 EN-US
(Equation 24)
When the denominator in the expression is equal to zero the time delay will be
infinity. There will be an undesired discontinuity. Therefore a tuning parameter
CrvSatn is set to compensate for this phenomenon. In the voltage interval U
n
<
down to U
n
< · (1.0 – CrvSatn/ 100) the used voltage will be: U
n
< · (1.0 – CrvSatn /
100). If the programmable curve is used this parameter must be calculated so that:
0
100
CrvSatn
B C
× - >
EQUATION1435 V1 EN-US
(Equation 25)
The lowest voltage is always used for the inverse time delay integration. The
details of the different inverse time characteristics are shown in section
"Inverse
characteristics" .
1MRK 505 384-UEN A
Section 7
Voltage protection
Breaker protection REQ650 2.2 IEC 169
Technical manual