SM3000
DELTA ELEKTRONIKA BV
1991, rev. May 2008
DESCRIPTIONS
Page 3 - 1
DESCRIPTIONS
1)
OUT PUT
The SM15-200D, SM30-100D, SM45-70D,
SM70-45D, SM120-25D and SM300-10D
can ei ther be used as a con stant volt age
source with cur rent limiting or as a con stant
current source with voltage lim iting.
The change of mode oc curs sharply at the
crossing of the voltage and cur rent settings
(fig. 3 - 1 shows the output ranges).
°
DISPLAY CV/CC SETTING FUNCTION
The setting of the volt age and cur rent con -
trol can be ob served on the front panel me -
ters by press ing the Dis play CV/CC Set ting
button. This al lows the current limit to be
set when op erating in the CV mode with out
shorting the out put terminals, and the volt -
age limit to be set when op erating in the CC
mode with out open ing the load leads.
°
OVER LOAD PRO TEC TION
The power supply is fully pro tected against
all over load con di tions, in clud ing short cir-
cuit.
2)
IN PUT VOLT AGE
The power supplies have a wide in put volt-
age range.
°
The units need a 3 phase in put voltage,
but
no neu tral con nec tion
is re quired.
°
The units can also op erate on one phase
but at 90% of the max. out put voltage,
with a slight in crease of the out put rip ple
volt age.
°
The units can also be used as a DC/DC
con verter.
°
non-standard line in put voltage
The units will still op erate at a line input
voltage lower than standard, but with a
reduction in out put power. Figure 3 - 3
shows the max. output cur rent as a func-
tion of output voltage with AC or DC line
in put volt age as a pa ram e ter.
Example: Say the re quired out put volt-
age is 24 V at a line in put voltage of 270 V
AC. Figure 3 - 2 shows the maximum
output cur rent for the SM30-100D to be
59 A.
°
Note:
All AC in put curves are mea sured
using 3 phase in put.
SM 300-10 D
SM 120-25 D
SM 70-45 D
SM 30-100 D SM 45-70 D
SM 15-200 D
fig. 3 - 1
The output ranges.
every point in hatched area can be used
fig. 3 - 2
Example how to use the graph
fig. 3 - 3
Max. output current vs output voltage
with AC or DC line input voltage as a pa rameter
