Data Sheet
Table Of Contents
- 1. Intended Use
- 2. Installation Instructions
- 3. AC-Input
- 4. DC-Input
- 5. Input Inrush Current
- 6. Output
- 7. Hold-up Time
- 8. Efficiency and Power Losses
- 9. Functional Diagram
- 10. Front Side and User Elements
- 11. Connection Terminals
- 12. Lifetime Expectancy
- 13. MTBF
- 14. EMC
- 15. Environment
- 16. Safety and Protection Features
- 17. Dielectric Strength
- 18. Approved, Fulfilled or Tested Standards
- 19. Regulatory Product Compliance
- 20. Physical Dimensions and Weight
- 21. Accessories
- 21.1. ZM1.WALL - Wall/Panel Mount Bracket
- 21.2. ZM12.SIDE - Side Mount Bracket
- 21.3. YRM2.DIODE - Redundancy Modules
- 21.4. YR20.246 - Redundancy Module
- 22. Application Notes
- 22.1. Peak Current Capability
- 22.2. Charging of Batteries
- 22.3. Series Operation
- 22.4. Parallel Use to Increase Output Power
- 22.5. Parallel Use for Redundancy
- 22.6. Use in a Tightly Sealed Enclosure
- 22.7. Mounting Orientations
CT5.241
CT-Series
3-PHASE, 24V, 5A, 120W
Aug. 2021 / Rev. 2.1 DS-CT5.241-EN All values are typical figures specified at 400Vac, 50Hz input voltage, 24V, 5A output load,
25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany
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22. A
PPLICATION
N
OTES
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 examples show typical voltage dips for resistive loads:
Fig. 22-1 10A peak current for 50ms, typ.
(2x the nominal current)
Fig. 22-2 25A peak current for 5ms, typ.
(5x the nominal current)
Peak current voltage dips
Typ. from 24V to 18.5V At 10A for 50ms, resistive load
Typ. from 24V to 13V At 25A for 2ms, resistive load
Typ. from 24V to 7V At 25A for 5ms, resistive load