CS10.244 Datasheet, PDF (20/24 Pages) PULS GmbH – 24V, 10A, SINGLE PHASE INPUT

C-Line
CS10.244
24V, 10A, SINGLE PHASE INPUT
22. APPLICATION NOTES
22.1. PEAK CURRENT CAPABILITY
The unit can deliver peak currents (up to several milliseconds) which are higher than the specified short term currents.
This helps to start current demanding loads. Solenoids, contactors and pneumatic modules often have a steady state
coil and a pick-up coil. The inrush current demand of the pick-up coil is several times higher than the steady-state
current and usually exceeds the nominal output current (including the PowerBoost). The same situation applies when
starting a capacitive load.
The peak current capability also ensures the safe operation of subsequent circuit breakers of load circuits. The load
branches are often individually protected with circuit breakers or fuses. In case of a short or an overload in one branch
circuit, the fuse or circuit breaker need a certain amount of over-current to open in a timely manner. This avoids
voltage loss in adjacent circuits.
The extra current (peak current) is supplied by the power converter and the built-in large sized output capacitors of
the power supply. The capacitors get discharged during such an event, which causes a voltage dip on the output. The
following two examples show typical voltage dips:
Fig. 22-1 Peak load with 2x the nominal
current for 50ms, typ.
Output
24V
Voltage
18.5V
20A
Fig. 22-2 Peak load with 5x the nominal
current for 5ms, typ.
24V
50A
Output
Voltage
12V
Output
0A
Current
10ms/DIV
20A Peak load (resistive) for 50ms
Output voltage dips from 24V to 18.5V.
Output
0A
Current
1ms/DIV
50A Peak load (resistive) for 5ms
Output voltage dips from 24V to 12V.
Peak current voltage dips
typ. from 24V to 18.5V at 20A for 50ms, resistive load
typ. from 24V to 17V at 50A for 2ms, resistive load
typ. from 24V to 12V at 50A for 5ms, resistive load
Jul. 2015 / Rev. 2.0 DS-CS10.244-EN
All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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20/24