Application Notes; Peak Current Capability - Pulse DIMENSION CP Series Manual

CP-Series
23. A N
PPLICATION
23.1. P C
EAK URRENT
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. 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 three examples show
typical voltage dips for resistive loads:
Fig. 23-1 10A peak current for 50ms , typ.
(2x the nominal current)
24V
10A
0A
10ms /DIV
Fig. 23-3 15A peak current for 12ms , typ.
(3x the nominal current)
24V
15A
12ms
0A
10ms /DIV
Peak current voltage dips
Jul. 2022 / Rev. 1.2 DS-CP5.241-EN All parameters are typical values specified at 230Vac, 50Hz input voltage, 24V, 5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
OTES
C
APABILITY
Output
Voltage
16V
Output
C urrent
Output Voltage
10.5V
Output C urrent
Typically from 24V to 16V
Typically from 24V to 16.5V
Typically from 24V to 14V
www.pulspower.com Phone +49 89 9278 0 Germany
CP5.241, CP5.241-C1, CP5.241-S1,
CP5.241-S2, CP5.242
24V, 5A, 120W, S
Fig. 23-2 25A peak current for 5ms , typ.
(5x the nominal current)
24V
25A
1ms /DIV
0A
Please note: The DC-OK relay triggers when the voltage dips more
than 10% for longer than 1ms.
At 10A for 50ms and resistive load
At 25A for 2ms and resistive load
At 25A for 5ms and resistive load
P I
INGLE HASE NPUT
Output
Voltage
14V
Output
C urrent
25/30