CP10E242 Datasheet, PDF (24/30 Pages) PULS GmbH – 24V, 10A, 240W, SINGLE PHASE INPUT

CP-Series
CP10.241, CP10.241-C1, CP10.241-S1,
CP10.241-S2, CP10.242
24V, 10A, 240W, SINGLE PHASE INPUT
24. APPLICATION NOTES
24.1. 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 for resistive loads:
Fig. 24-1 20A peak current for 50ms , typ.
(2x the nominal current)
Output
24V
Voltage
17V
20A
Output
0A
Current
10ms/DIV
Fig. 24-2 50A peak current for 5ms , typ.
(5x the nominal current)
24V
Output
Voltage
50A
15.5V
Output
Current
0A
1ms/DIV
Fig. 24-3 30A peak current for 12ms , typ.
(3x the nominal current)
24V
30A
12ms
10.5V
Output Voltage
Output Current
0A
10ms/DIV
Please note: The DC-OK relay triggers when the voltage
dips more than 10% for longer than 1ms.
Peak current voltage dips
Typically from 24V to 17V
Typically from 24V to 19V
Typically from 24V to 15.5V
At 20A for 50ms, resistive load
At 50A for 2ms, resistive load
At 50A for 5ms, resistive load
Aug. 2017 / Rev. 1.4 DS-CP10.241-EN
All values are typical at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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