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Vega 900 Handbook
Permitted orientations: Horizontal with chassis lowest, on either side or vertical with the airflow upwards.
For input voltages equal to or greater than 150V ac ratings are as follows:
Cooling
Max
Option
Ambient
F, D
50
Q
50
C
50
For input voltages less than 150V ac ratings are as follows:
Cooling
Max
Option
Ambient
See table
F
below
D
50
Q
50
C
50
Power ratings for cooling option F:
Output Power (w)
Input
Voltage
Max. Ambient
(Vrms)
40°C
85
650
90
720
100
830
110 - 149.9
900
Ruggedised fan (Papst 622HH) not for use with PSU's fitted with IEC Inlet.
Customer Air Cooling (option C):
The following method must be used for determining the safe operation of PSUs when C option (Customer Air) is
fitted, ie fan not fitted to PSU.
For PSUs cooled by customer supplied airflow the components listed in the following table must not exceed the
temperatures given. Additionally ratings specified for units with an internal fan must still be complied with, eg mains
input voltage range, maximum output power, ampere turns, module voltage / current ratings and maximum ambient
temperature. To determine the component temperatures the heating tests must be conducted in accordance with
the requirements of the safety standard being considered for the end equipment.
Test requirements include: PSU to be fitted in its end-use equipment and operated under the most adverse
conditions permitted in the end-use equipment handbook/specification and which will result in the highest
temperatures in the PSU. To determine the most adverse conditions consideration should be given to the
end use equipment maximum operating ambient, the PSU loading and input voltage, ventilation, end use equipment
orientation, the position of doors & covers, etc. Temperatures should be monitored using type K fine wire
Dual Width
Max
Modules
Power
Fitted
No
900
Yes
900
No
650
No
750
Yes
750
See Customer Air Cooling section for ratings
Dual Width
Max
Modules
Power
Fitted
No
See table
Yes
below
No
650
Yes
650
Yes
550
No
650
Yes
610
Yes
650
See Customer Air Cooling section for ratings
Max. Ambient 50°C
xEW or xFW
option fitted
not permitted
650
650
650
Max AT in
Max AT
adjacent
(total)
regions (note
1)
220
180
220
180
220
n/a
180
n/a
180
140
Max AT in
Max AT
adjacent regions
(total)
(note 1)
220
n/a
220
180
220
n/a
220
180
180
140
220
n/a
220
180
145
115
xEW and xFW
options not
fitted
615
650
720
770
Page 20 of 34
Module
Current
Rating
100%
100%
100%
100%
100%
Module
Current
Rating
100%
100%
100%
100%
100%
100%
95%
95%
17155 issue 26, Sept 2019
Publicité
