SM3000 DESCRIPTIONS
rev. February 2018 DELTA ELEKTRONIKA B.V. Page 3 - 1
3 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 lim it ing or as a con stant
cur rent source with volt age lim it ing.
The change of mode oc curs sharply at the
cross ing of the volt age and cur rent set tings
(fig. 3 - 1 shows the out put ranges).
° DIS PLAY CV/CC SETTING FUNCTION
The set ting 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
but ton. This al lows the cur rent limit to be set
when op er at ing in the CV mode with out
short ing the out put ter mi nals, and the volt -
age limit to be set when op er at ing in the CC
mode with out open ing the load leads.
° OVER LOAD PRO TEC TION
The power sup ply is fully pro tected against
all over load con di tions, in clud ing short cir -
cuit.
2) IN PUT VOLT AGE
The power sup plies have a wide in put volt -
age range.
° The units need a 3 phase in put volt age,
but no neu tral con nec tion is re quired.
° The units can also op er ate on one phase
but at 90% of the max. out put volt age,
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 volt age
The units will still op er ate at a line in put
volt age lower than stan dard, but with a re -
duc tion in out put power. Figure 3 - 3
shows the max. out put cur rent as a func -
tion of out put volt age with AC or DC line
in put volt age as a pa ram e ter.
Ex am ple: Say the re quired out put volt age
is 24 V at a line in put volt age of 270 V AC.
Figure 3 - 2 shows the max i mum out put
cur rent for the SM30-100D to be 59 A.
° Note: All AC in put curves are mea sured
us ing 3 phase in put.
3) IN PUT CUR RENT
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 out put ranges.
ev ery point in hatched area can be used
fig. 3 - 2
Ex am ple how to use the graph
fig. 3 - 3
Max. out put cur rent vs out put volt age
with AC or DC line in put volt age as a pa ram e ter
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