ITech IT6512C User Manual page 56

t (ms) 40≤t
d
t (ms)
r
a
If not otherwise agreed, use the upper voltage level with the upper value for internal
resistance or use the lower voltage level with the lower value for internal resistance.
LOAD DUMP, SINGLE PULSE - WITH CENTRALIZED LOAD DUMP SUPPRESSION
t: time
U: test voltage
t : Duration of pulse
d
t : Rising Slope
r
U : Supply Voltage for generator in operation( see ISO 16750-1 )
A
U : supply Voltage
S
U *: supply voltage with load dump suppression
S
Parameter
U
a
U (V) 79≤U
S
U *(V)
S
(Ω)
a
R 0.5≤R
i
t (ms) 40≤t
d
t (ms)
r
a
I
f not otherwise agreed, use the upper voltage level with the upper value for internal
resistance or use the lower voltage level with the lower value for internal resistance.
The following general considerations of the dynamic behavior of alternators during load
dump apply:

The internal resistance of an alternator, in the case of load dump, is mainly
a function of alternator rotational speed and excitation current.
Copyright© Itech Electronics Co., Ltd.
10 10
≤400
0
100≤t
d
−5
TEST PULSE 5B
Type of system
=12V U =24V
N N
≤101
151≤U
S
As specified by
35 customer(typical
value 58)
≤4
1≤R
i
10 10
≤400
0
100≤t
d
−5
Function and Features
≤350
0
d
−5
Minimum test
requirements
≤202
S
5 pulses at 1 min
intervals
≤8
i
≤350
0
d
−5
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