Bosch L 309 Series, Техническая информация

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Dimensioning instructions
Type L 309
Power Supply Module
16
1070 078 131-104 (00.05) GB
When the duty cycle has been calculated, the following load diagrams can be used
to verify the correct dimensioning of the thyristors:
Load diagram of types L 309.150 and L 309.151:
2500
Current carrying capacity I
RMS
[in A]
2000
1500
1000
500
ED
[in %]
0 2 5 10 20 50 100
0
Water cooling
4l/min; 30
_
C
150 kVA
100 kVA
30 cycles
weld time
max.
50% ED
L 309.150
L 309.151
1
Example: Weld data of the machine: 100 kVA
Weld time:
t
s
= 10 cycles (< 30 cycles)
Duty cycle: ED = 10 %
Current: I
RMS
= 600 A
The intersection for ED = 10% and I
RMS
= 600 A found in the diagram
is below curve “1”.
Thus, the thyristor has been properly dimensioned.