41
EN
Instruction Manual
PSI 8000 2U Series
Date:04-26-2011
About the power supply
4. General
4.1
Prologue / Warning
This user instruction manual and the device are intended to be
used by users who know about the principle of a power supply.
The handling of the device should not be left to persons who
are unaware of the basic terms of electrotechnology, because
these are not described in this manual. Inappropriate handling
and non-observance to the safety instructions may lead to a
damage of the device or loss of warranty!
4.2
Cooling
The air inlets in the front and the air outlets at the rear have to
be kept clean to ensure proper cooling. Take care of at least
10cm distance at the rear to any surrounding objects in order
to guarantee unimpeded air flow.
4.3
Opening the device
When opening the unit or removing parts from the inside with
tools there is risk of electric shock by dangerous voltages.
Open the unit only at your own risk and disconnect it from the
mains before.
Any servicing or repair may only be carried out by trained perso-
nnel, which is instructed about the hazards of electrical current.
5. Installation
5.1
Visual check
After receipt, the unit has to be checked for signs of physical
damage. If any damage is found, the unit may not be operated.
Also contact your dealer immediately.
5.2
Mains connection 2U models
The unit is grounded via the mains cord. Thus the unit may
only be operated at a mains socket with grounding contact.
This must not be interrupted by an extension cable without
ground conductor!
The unit is fused with a 5 x 20mm safety fuse (for value see tech-
nical specs table), which is located in the fuseholder at the rear.
5.3
Mains connection 4U models
Though the device features a three-phase input terminal, it is
used with a normal 230V supply (L + N + PE). Three-phase
input is not allowed because of security reasons. The input
uses L1 and L2, plus N and PE. So the input connection has
to be like this:
5.4
DC output terminal
The power output is located on the front of the device. It is
permanent short-circuit-proof.
The output is
not
fused! In order to avoid damage to the load
application, always take care for the nominal values of the load.
The cross section of the leads depends on several conditions,
like the output current, the lead length and the ambient tem-
perature.
Up to 1.5m lead length we recommend to use:
up to
10A
:
0,75mm²
up to
15A
:
1,5mm²
up to
30A
:
4mm²
up to
40A
:
6mm²
up to
60A
:
16mm²
up to
120A
:
35mm²
per cable
(flexible wire).
The outputs “+” and “-“ are not grounded, so that
one
of them
may be grounded if necessary.
Attention! When grounding one of the output poles always
check if one of the poles of the load (eg. electronic load) is
also grounded. This could result in a short-circuit!
Attention! Notice the potential shift of the output poles
when using series connection! Grounding is hereby only
recommended at the pole with the lowest potential against
ground.
5.5
Terminal „Sense“ (Remote sense)
In order to compensate the voltage drop along the load leads
(max. 1V per lead), the power supply can „sense“ the voltage at
the load instead at the output. It will regulate the output voltage
so that the desired voltage is provided to the load.
The remote sense feature is wired with correct polarity to the
terminal
System Bus
at the rear.
(+) Sense must only be connected to (+) at the load appli-
cation and (–) Sense must only be connected to (–)! Else
both systems can take damage.
For additional information also see section „10.1 Remote sense“.
5.6
Interface card slot
The unit can be equipped with an optional interface card. The
slot to insert the card is located at the rear side. Further infor-
mation about the interface cards can be found in section „8.
