TDK-Lambda Vega 450 Instrucciones De Uso página 21

Vega 450 Handbook
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
thermocouples (secured with cyanoacrylate adhesive, or similar) placed on the hottest part of the component (out of
any direct airflow) and the equipment should be run until all temperatures have stabilised.
Circuit Ref.
-
T1, TX101, TX201
XQ1, XT1
XTR1
TX1
L1, L2, XT601
L4, T2
Various
RLY1
C15
Various
C2, C3, C14
Various
Various
See diagrams at end of this section for locations of components in the PSU.
Custom Models:
All ratings as per standard models unless otherwise stated.
Model: Vega 450 AFT B/S 24D5S 21D5S (NS-CLE-010)
Input: 85-264Vac, 47-63Hz
Maximum outputs: 24V, 12.5A; 21V, 7.143A
Orientation: All except upside down and vertical with the airflow downwards
Cooling: Papst 612NML or 612NGML fan fitted with up to 64 ohms total resistance in series.
Comments: Forward air.
Model: Vega 450 AFT B/S 24E5HS (NS-CLE-011)
Input: 85-264Vac, 47-63Hz
Maximum outputs: 24V, 14.59A
Maximum output power: 350W
Orientation: All except upside down and vertical with the airflow downwards
Cooling: Papst 612NML or 612NGML fan fitted with up to 64 ohms total resistance in series.
Comments: Forward air
Description
Power transformer primary, secondary and core
Module current transformer windings
D, E, EV, F & FV Primary option transformers
EY, FY, EV & FV Primary option transformers
xEW & xFW Primary option transformers
Choke winding
Choke winding
All other choke & transformer windings
Relay
X capacitor
All other X and electrolytic capacitors
Electrolytic Capacitor
All other 10mm dia Electrolytic Capacitors
All other 12.5mm dia Electrolytic Capacitors
Page 21 of 35
Max. Temperature (°C)
130
127
90
90
130
110
117
110
100
100
105
67
80
85
17138 issue 35, Sept 2019