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2 Safety
2.1 Safety Notice
These instructions are intended for the use of personnel who are experienced in the installation, operation, and maintenance of
power quality filters. Because of the high voltages required by the application, the personnel involved in the installation, operation,
and maintenance of these filters must be aware of the necessary safety precautions for this type of equipment. Carefully read the
instructions in this manual before installing the DC filter.
The Danfoss DC filter has been run through several demanding factory tests before the delivery. Carefully inspect the package for
any damage that may have occurred during the transportation. Follow the instructions for unpacking the DC filter and carefully
inspect it for any signs of possible damage. If the installation of this equipment is going to be in the future, cover and store the filter
in a clean and dry location.
When the DC Filter has been in storage, before applying power to the filter, make sure that there is no condensation on the internal
components of the filter.
2.2 Safety Symbols
The following symbols are used in this guide:
D A N G E R
Indicates a hazardous situation which, if not avoided, will result in death or serious injury.
W A R N I N G
Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
C A U T I O N
Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
N O T I C E
Indicates information considered important, but not hazard-related (for example, messages relating to property damage).
2.3 Warnings
D A N G E R
SHOCK HAZARD FROM TERMINALS
The terminals and components of the filter can be live 5 minutes after the filter is disconnected from the mains. Touching any of
the exposed power connectors during operation or while voltage is present can cause death or serious injury.
Do not touch the terminals when the filter is connected to mains. Before working on the DC filter, wait at least the voltage
discharge time stated in the manual for the corresponding DC/DC converter. Use a measuring device to make sure that there
is no voltage.
C A U T I O N
DAMAGE FROM INSUFFICIENT GROUNDING
Insufficient grounding can damage the DC filter.
The DC filter must be grounded before switching on the power. To ground the filter, use the terminal marked with the PE
symbol. Make sure that the ground connection is clean and all varnish is removed.
AJ377845348678en-000101 / 172F4785 | 5
Danfoss A/S © 2023.01
Safety
DC Filters
Design Guide
