Publicité
Les langues disponibles
Les langues disponibles
NV175 HIALT Handbook
Customer Air Cooling (open frame, options C and U):
The following method must be used for determining the safe operation of PSUs.
The components listed in the following table must not exceed the temperatures given. To determine the component
temperatures the heating tests must be conducted in accordance with the requirements of the standard in question.
Consideration should also be given to the requirements of other safety standards. 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.
L3, L7
C1, C4
C6, C12
L2
C7
T1, T2
XU3
TX701
L5
XL401
XV406
XL601
XU601
XL501
XV504
XL601
XU601
IC1**
Various
* Ch 3 xL where x = 3, 5, T or F.
** 1A channel 4 only.
† The higher temperatures limits in brackets may be used but product life may be reduced.
†† Ch 4 THV and FHV
See diagrams below for components to be monitored:
Input Connections:
Molex 3 pin header 7A/250V MAX.
IEC 60320 inlet.
Common mode choke winding
X capacitors
Capacitor
Boost choke winding
Electrolytic capacitor
Transformer winding
Control board optocoupler
Global option transformer
Ch 1 Output choke
Ch 2 Output choke (SMA 1 )
Ch 2 highside FET (SMA 1 )
5L Ch 2 output choke (SMA 1 )
5L Ch 2 IC (SMA 1 )
Ch 3 (SMA 2) and CH 4†† (SMA 3) output choke
Ch 3 (SMA 2) and CH 4†† (SMA 3) highside FET
Ch 3* (SMA 2) and CH 4 (SMA 3) output choke
Ch 3* (SMA 2) and CH 4 (SMA 3) IC
Ch 4 Voltage regulator
All other electrolytic capacitors
Description
Page 18 of 22
Max. Temperature (°C)
130 † (140)
100
105
130
70 † (105)
130
100
90
125
125
115
125
115
125
115
125
115
110
90 † (105)
17168 issue 9, October 2018
Publicité
