NGPS – User’s Manual
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2.6
Hydraulic Plug Connection
In order to properly cool the model, each NGPS needs to be connected to the
hydraulic system by mean of the plugs on the rear panel of the module (
Water cooled NGPS rear view. Plugs for the
). As mentioned in
Section 141.2
, the
corresponding mating hydraulic plug (to be plugged into the power units) is the
PLCD17006
and is described in detail.
2.7
Grounding Outputs
By factory-default configuration, the NGPS minus output terminal is grounded
to the Protective Ground (i.e. chassis, Mains-Earth terminal and all metallic parts
composing the box) through a fuse. This fuse, namely Earth Fuse (E.F.), is accessible
from the rear panel. By means of E.F., the output terminals are not floating and cannot
be connected to Protective Ground.
If accidentally one of the output terminals is conducting to the Protective
Ground, a fault will be triggered and the power supply is switched off. Refer to Earth
Leakage Fault (
Section 1.8.1
) and Earth Fuse Fault (
Section 1.8.2
To allow floating operation of the output, it is sufficient to remove the Earth
Fuse from the fuse-holder and set the power supply for floating operation (for more
information please refer to the
Remote Control Manual
).
When the FAST-PS is configured to operate in floating mode, either the positive or the
negative output terminals can be grounded. Always use two wires to connect the load
to the power supply regardless of how the system is grounded.
Models up to 60 VDC rated output shall not float outputs
more than ±60 VDC above/below chassis ground. Models >
60 VDC rated output shall not float outputs more than
±500VDC above/below chassis ground.
2.8
Parallel Operation
NGPS modules can be run in parallel operation, thus increasing the output
current of the paralleled solution while maintaining the same voltage of each building
block.
When run in a parallel infrastructure, the following points have to be respected:
•
The parallel system is made of modules that have the same full scale
rated current and the same full scale rated voltage (i.e. the modules must
be exactly the same);
WARNING
