CT10.241

C-Series

The unit is designed to supply any kind of loads, including unlimited capacitive and inductive loads.

CT10.241 power supplies can be paralleled to increase the output power.

This power supply can also be paralleled with power supplies from the

DIMENSION CT, QS or QT-series. The output voltage of all power supplies

shall be adjusted to the same value (±100mV) in “Single use” mode with the

same load conditions on all units, or the units can be left with the factory

settings. After the adjustments, the jumper on the front of the unit shall be

moved from “Single use” to “Parallel use”, in order to achieve load sharing.

The “Parallel use” mode regulates the output voltage in such a manner that

the voltage at no load is approx. 5% higher than at nominal load. See also

chapter 6. If no jumper is plugged in, the unit is in “Single use”. Factory

setting is “Single use” mode. A fuse (or diode) on the output of each unit is only required if more than three units are

connected in parallel. If a fuse (or circuit breaker) is used, choose one with approximately 150% of the rated output

current of the power supply. Keep an installation clearance of 15mm (left / right) between two power supplies and

avoid installing the power supplies on top of each other. Do not use power supplies in parallel in mounting

orientations other than the standard mounting orientation (input terminals on the bottom and output terminals on

top of the unit) or in any other condition where a derating of the output current is required (e.g. altitude, above 60°C,

…). Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple power

supplies.

Unit B

-

+

Load

+

-

Fuse

Fuse

AC

DC

AC

DC

-

+

Unit A

Power supplies can be paralleled for redundancy to gain higher system availability. Redundant systems require a

certain amount of extra power to support the load in case one power supply unit fails. The simplest way is to put two

power supplies in parallel. This is called a 1+1 redundancy. In case one power supply unit fails, the other one is

automatically able to support the load current without any interruption. Redundant systems for a higher power

demand are usually built in a N+1 method. E.g. five power supplies, each rated for 10A are paralleled to build a 40A

redundant system. For N+1 redundancy the same restrictions apply as for increasing the output power, see also section

23.8.

Please note: This simple way to build a redundant system does not cover failures such as an internal short circuit in

the secondary side of the power supply. In such a case, the defect unit becomes a load for the other power supplies

and the output voltage can not be maintained any more. This can only be avoided by utilizing decoupling diodes

which are included in the decoupling module YRM2.DIODE.

Recommendations for building redundant power systems:

a)

Use separate input fuses for each power supply.

b)

Set the power supply into “Parallel Use”.

c)

Monitor the individual power supply units. A DC-ok lamp and a DC-ok contact are included in the redundancy

module YRM2.DIODE. This feature reports a faulty unit.

d)

It is desirable to set the output voltages of all units to the same value (± 100mV) or leave it at the factory setting.

Jan. 2010 / Rev. 1.3 DS-CT10.241-EN

All parameters are specified at 24V, 10A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.

www.pulspower.com Phone +49 89 9278 0

Germany

20/22