TDK-Lambda Vega 750 Manuel D'installation page 17

Vega 750 Instruction Manual
Additional module limitations:
E2 module fitted in slots 4/5 is limited to 55A.
For PSUs with three D modules fitted or two D modules fitted with an E module in slots 4 & 5:
D1L & D1H in slots 2/3 is limited to 42A and in slots 4/5 is limited to 47A
D2 in slots 2/3 is limited to 40A
Adjusting output voltage beyond the stated range may cause overvoltage protection (OVP) to operate, whereby all
outputs will turn off. To reset OVP turn back output voltage adjustment and remove the mains supply for 30 seconds,
and then swich back on.
All the above ratings and limitations apply to the individual modules from which a series or paralleled pair is made.
ES ratings (IEC/EN/UL/CSA 62368-1) and Outputs Connected In Series:
•
Non-earthed outputs that have secondary's with 4 or more turns are ES2 as a single fault in the secondary may
make them exceed the ES1 limits between output and earth.
•
Non-earthed outputs that are in series are ES1 if all the series outputs use 1 turn secondary's and there are no
more than 3 outputs connected in series.
•
For series outputs, all outputs are ES1 except under the following circumstance: Outputs connected in series are
ES2 if the highest rated module output at nominal voltage + 30% + the total voltage of the remaining series
modules at the max rated voltage of each module > 60Vdc < 120Vdc and ES3 for any greater output voltage.
•
The total voltage of series outputs must not exceed 160V.
•
The highest ES rating of any series outputs then applies to all the outputs.
SELV and Outputs Connected In Series:
Outputs are SELV except as described below:
Non-earthed outputs that have secondaries with 2 or more turns are non-SELV as a single fault in the secondary

may make them exceed the SELV limit between output and earth.
Non-earthed outputs that are connected in series are non-SELV unless all the seriesed outputs use 1 turn

secondaries and there are no more than 3 outputs connected in series.
Outputs connected in series are non-SELV if the total output voltage + 20% of the max. rated output voltage of

the output with the highest rated voltage exceeds 60Vdc (the 20% addition allows for a single fault in any one
individual channel).
The total voltage of a seriesed output must not exceed 160Vdc.

If any output or seriesed output is non-SELV then all the outputs in the PSU must be considered non-SELV.

Non-SELV outputs must be guarded or a deflector fitted during installation to avoid a service engineer making

inadvertent contact with the output terminals, or dropping a tool onto them.
All outputs have operational spacings to earth, and due consideration must be given to this in the end product

design.
Cooling Options:

Cooling Option
F & D
(Standard or Ruggedised
Fan – Forward Airflow)
Input Voltage (Vrms)
85
90
100
110 – 149.9
150 - 264
Max Dual Width
Ambient Modules
(°C) Fitted
No
50
Yes
Max Output Power (W)
600
650
700
750
900
Page 17 of 26
Max Max AT
Power (W) (total)
See table
220
below
See table
220
below
Module
Current
AT Limit
Rating (All
Modules)
n/a 100%
180 100%
17161 issue 20, November 2021