Safety; Warnings; Symbols Used In This Manual; Operator's Safety - Danfoss AHF 005 Instruction Manual

Warnings

The Danfoss harmonic filter AHF 005 and
AHF 010 contain dangerous voltages
when connected to line voltages. Only
a competent electrician should carry out the
electrical installation. Improper installation of the
filter module or the connected frequency converter
may cause equipment failure, serious injury or
death. Follow this manual and National Electrical
Codes and local safety codes.
Operation of the harmonic filter is only allowed
with a closed cover of the housing!

Symbols used in this manual

When you read this manual you will come across
different symbols that require special attention.
The symbols used are the following:
Warning of hazardous electrical voltage
Warning of a general danger
NB!:
This note designates general, useful notes. If
you observe it, handling of the filter module
/ drive system is made easier.

Operator's safety

After mains disconnections, the power
terminals X1.1, X1.2 and X1.3 remain
live for minimum 15 minutes.
The filter modules have to be installed
in a way, that they fulfil their function
and don't expose persons to danger.
They have to be mounted correctly and used in
accordance with their purpose.
2
AHF 005/010

Avoid filter module damage

1. The filter modules are to be used only with
Danfoss frequency converters. The usage
with other electrical loads is not permitted
and may damage the devices.
2. Don't use the drive system (frequency converter,
motor load and filter module) if the equipment
has been damaged.
3. Modifications of the filter modules are not allowed.

DC-link resonance

To prevent resonance's in the DC-link, it is
recommended to disable the dynamic DC
link compensation.
483 Dynamic DC link compensation
(DC LINK COMP.)
Value:
Off
On
Function:
The VLT 5000, 6000 and 8000 series include a feature,
which ensures that the output voltage is independent
of any voltage fluctuation in the DC link, e.g. caused
by fast fluctuation in the mains supply voltage. The
benefit is a very steady torque on motor shaft (low
torque ripple) under most mains conditions.
Description of choice:
In some cases this very dynamic compensation can
cause resonance's in the DC link and should then
be disabled. Typical cases are where a line choke
or a passive harmonic filter (e.g. filters AHF005/010)
is mounted in the mains supply to the frequency
converter to suppress harmonics. Can also occur
on mains with low short circuit ratio.
MG.80.B2.02 - VLT is a registered Danfoss trademark
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