SM6000 DELTA ELEKTRONIKA BV
July 2003, rev. May 2008 DESCRIPTIONS Page 3 - 1
fig. 3 - 1
Output ranges. Every point in
hatched area can be used
SM 300-20
SM 120-50
SM 30-200
SM 45-140
SM 70-90
SM 60-100
SM 15-400
DESCRIPTIONS
1) OUT PUT
The SM15-400, SM30-200, SM45-140, SM60-100, SM70-90, SM120-50
and SM300-20 can ei ther be used as a con stant volt age source with cur rent
limiting or as a con stant cur rent source with voltage lim iting.
The change of mode oc curs sharply at the cross ing of the voltage and cur rent
set tings. Figure 3 - 1 shows the output ranges.
° DISPLAY CV/CC SETTINGS FUNCTION
The settings of the voltage and cur rent con trol (also when pro grammed) can
be ob served on the front panel me ters by press ing the Dis play CV/CC Set -
tings 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 without open ing the load leads.
° OVER LOAD PRO TEC TION
The power supply is fully pro tected against all overload con ditions, in cluding
short cir cuit.
2)
IN PUT VOLT AGE
The power supplies have a wide in put voltage range.
° The unit needs a 3 phase in put voltage, but no neu tral con nec tion is re -
quired.
° The unit only op erates on three phases. In case of Phase Loss, the
ACF-status (AC Fail) will be high, the ACF-LED will light and the out put
shuts down after a few sec onds.
3)
IN PUT CUR RENT
The unit has ac tive power fac tor correction (PFC). The in put cur rent will
therefore al most be a sine wave. This means that the RMS-value and the
harmonic dis tortion of the in put cur rent will be relatively low.
The peak in rush current is electronically lim ited. Switching on and off re peat-
edly will not result in excessive currents like with NTC cir cuits.
4)
STANDBY IN PUT POWER
The unit consumes very lit tle power when in standby. This makes it possible
to leave the in put power on when the out put is disabled us ing the Output
On/Off function (push button on front panel) or the Re mote Shut Down in put
(pin 5 on con nector CON E on the rear panel).
5)
EFFICIENCY
The ef ficiency is very high and constant over a wide output cur rent range.
High ef ficiency means low power loss and low heat gen eration.
6)
CV REG U LA TION
The CV-load reg ulation should be measured di rectly on the out put terminals
because a few cm of ca ble can have a voltage drop of several mV (at high
cur rent!).
7)
CC REG U LA TION
For ac curate CC-load reg ulation, do not use ex ternal volt age sens ing.
A volt age be tween S- and minus out put will create an er ror of about 0.04 %
per volt.
A volt age be tween S+ and + is not crit ical.The CC-stability is also af fected by
ex ter nal volt age sens ing.
Note: when the unit op erates in CC-mode, the DCF-LED will be on. When
the unit is in CC-mode most of the time, it is possible to dis able the LED with
DIP switch 3 on SW1 (rear panel).
8)
RIPPLE & NOISE
The out put rip ple is very low with al most no spikes. The rip ple volt age has to
be mea sured di rectly on the out put terminals us ing a probe with very short
connections (to avoid pick up of mag netic fields) (see fig. 3 - 2 and fig. 3 - 3).
At low tem per a tures like -20°C the rip ple in creases. By us ing high qual ity
elec tro lytic ca pac i tors the in crease is rel a tively low.
fig. 3 - 2
Mea sur ing rip ple volt age
WRONG !
fig. 3 - 3
Mea sur ing rip ple volt age
RIGHT !
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