Datasheet

CP10.361
CP-Series
36V, 6.7A, 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 13.4A peak current for 50ms , typ.
(2x the nominal current)
Fig. 24-2 33.5A peak current for 5ms , typ.
(5x the nominal current)
Output
Voltage
Output
Current
36V
Output
Voltage
36V
24/29
10ms/DIV
Output
Current
0A
13.4A
24.6V
1ms/DIV0A
33.5A
21.3V
Fig. 24-3 20A peak current for 12ms , typ.
(3x the nominal current)
36V
Output Voltage
12ms
16.8V
20A
Output Current
0A
Please note: The DC-OK relay triggers when the voltage
dips more than 10% for longer than 1ms.
10ms/DIV
Peak current voltage dips Typically from 36V to 24.6V At 13.4A for 50ms, resistive load
Typically from 36V to 22.7V At 33.5A for 2ms, resistive load
Typically from 36V to 21.3V At 33.5A for 5ms, resistive load
Aug. 2017 / Rev. 1.1 DS-CP10.361-EN
All parameters are specified at 36V, 6.7A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
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