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Full load losses Plfl are:
Maximum power supply drop out time (Buffer time/voltage failure buffer) of AVy is achieved by adding the
maximum recommended capacitance to the DC bus.
The following table show the maximum power supply drop out time for different Undervoltage thresholds
and inverter sizes. The meaning of the symbols in the colums is as follows:
C
= internal capacitance (in uF),
std
C
max = max external total capacitance (in uF),
ext
T
= max drop out time (in sec.),
buff
P
= power supply (watts),
SMPS
U
= volts threshold to disable drive operation (in volt),
buff
U
= min DC volts that will support the power supply (in volt)
min
Where T
is defined by:
buff
Size
4185
4220
4300
4370
5450
5550
6750
7900
71100
71320
81600
82000
Ch.5
90
P
P
=
lfl
m
(C
C max) (U
std +
ext
T
=
buff
Table 5.10.1: Drive Trip Times, 230-V Threshold
P
C
SMPS
std
70
1800
70
2200
70
3300
70
4950
70
4950
70
6600
70
6600
70
9900
70
14100
70
14100
70
14100
AVy - HGB
1 - h
m
h
fA029
m
2
2
- U
)
buff
min
6
2 P
10
SMPS
C
max
U
ext
buff
4500
230
4500
230
4500
230
4500
230
4500
230
0
230
0
230
0
230
0
230
0
230
0
230
U
T
min
buff
200
0.58
200
0.62
200
0.72
200
0.87
200
0.87
200
0.61
200
0.61
200
0.91
200
1.3
200
1.3
200
1.3
avy4225
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