Datasheet

Your partner in power supply:
European
Power Supply
Manufacturers
Association
PULS GmbH
Arabellastraße 15
D-81925 München
Tel.: [phone]
www.puls-power.com
Fax: [phone]
Data sheet
2/2 sl20e310 / 030709
Bayerns Best 50
Czech 100 Best
Europe’s 500
Unless otherwise stated, specifications are valid for AC 230V input voltage, +25°C ambient temperature, and 5 min. run-in time. They are subject to change without prior notice.
For further information, especially about, EMC,
Connections, Safety, Approvals, Mechanics und Mounting,
see page 2 of the „The SilverLine“ data sheet.
Efficiency, Reliability etc.*
Start Behaviour
Overload Behaviour
Overtemperature Protection
Efficiency typ. 92% (24.5V/20A, Vin
rated
)
Losses typ. 42W (24.5V/20A, Vin
rated
)
MTBF 504.000h acc. to Siemensnorm SN 29500
(24.5V/20A, AC 400V, T
amb
= +40°C)
Life cycle (electrolytics):
The unit exclusively uses longlife electrolytics, specified for +105°C
(cf. ’The SilverLine’, p.2). High reliability and lifetime, as
• only 4 aluminum electrolytics and
• no small aluminum electrolytics are used.
Start-up delay
Rise time
typ. 0.45s
appr. 5-20ms, depending on load
Two different operating mode options, switchable by plugging the front-
panel OVL-jumper. If the jumper is missing, the unit is in the Fuse Mode.
The unit is delivered preset in Continuous Mode.
a) Continuous Mode (continuous current):
• Jumper is in the 'OVL cont. mode' position.
• When overload or short-circuit occurs, the unit continuously supplies cur-
rent (see. diag. 1), no Hiccup.
Advantage:
The unit starts reliably even with heavy, non-linear loads (high ca-
pacities, DC-DC converters, motors). The high short-circuit current triggers
downstream fuses, and allows for selective configuration of electrical instal-
lations.
b) Fuse Mode (Switch-off after typ. 4s):
• Jumper is in the 'OVL fuse mode' position.
• When overload, short-circuit or overload with 2-phase operation occurs or
in case of overtemperature for more than typ. 4s, the unit switches off the
output (residual volt. <3V without load, average short circuit current
<0.1A)
• Definition of overload or short-circuit: The set output voltage in each case
can no longer be maintained.
• The capacity to deliver current (PULS Overload Design) (see diag. 1)
remains unchanged during the typ. 4s delay time.
• Red LED flashes at switch-off.
Feature:
With some applications, the Fuse Mode can replace the usual fusing
on the secondary side. The Fuse Mode has closer tolerances than thermal
trips. The release delay time of typ. 4s ensures that motors can be reliably
operated.
Re-start:
• by pushing the reset button on the unit’s bottom panel.
• by disconnection from mains and re-start of the unit after >1 min.
Continuous Mode Output voltage is adjusted downwards as long as
overtemperature prevails
Fuse Mode Unit remains switched off after overheating until re-
start (after cooling); (also see ’Re-start’ above).
86%
87%
88%
89%
90%
91%
92%
93%
94%
4 8 12 16 20 24
Output current Iout [A]
Efficiency [%]
3 x AC 400V
3 x AC 340V
3 x AC 480V
0
5
10
15
20
25
30
0 5 10 15 20 25 30
Output current Iout [A]
Output voltage Vout [V]
24.5V / Single
24.5V / Parallel
28V / Single
28V / Parallel
0
10
20
30
40
50
60
340 360 380 400 420 440 460 480 500
Input voltage VACin [V]
Hold-up time [ms]
40% load
60% load
80% load
100% load
125% load
Efficiency (typ., @ V
out
=24V)
Hold-up time (min., @ V
out
=24.5V)
Output characteristic (typ.)
3-phase
3-phase
diag. 1
diag. 2
diag. 3