Danfoss VLT 5000 Series Manual page 4

The voltage of the frequency converter
I
is dangerous whenever the equipment
is connected to mains. Incorrect
installation of the motor or the frequency converter
may cause damage to the equipment, serious
personal injury or death.
Consequently, the instructions in this manual,
as well as national and local rules and safety
regulations, must be complied with.
I I I I I Safety regulations
1. The VLT frequency converter must be discon-
nected from mains if repair work is to be carried
out.
Check that the mains supply has been discon-
nected and that the necessary time has passed
before removing motor and mains plugs.
2. The [STOP/RESET] key on the control panel of
the VLT frequency converter does not discon-
nect the equipment from mains and is thus not
to be used as a safety switch.
3. Correct protective earthing of the equipment
must be established, the user must be protec-
ted against supply voltage, and the motor must
be protected against overload in accordance
with applicable national and local regulations.
4. The earth leakage currents are higher than
3.5 mA.
5. Protection against motor overload is not inclu-
ded in the factory setting. If this function is
desired, set parameter 128 to data value ETR
trip or data value ETR warning.
Note: The function is initialised at 1.16 x rated
motor current and rated motor frequency (see
page 92).
Touching the electrical parts may be fatal - even after the
equipment has been disconnected from mains.
Also make sure that other voltage inputs have been
disconnected, such as external 24 V DC, load-sharing
(linkage of DC intermediate circuit), as well as the motor
connection for kinetic back-up.
Using VLT 5001-5006: wait at least 4 minutes
Using VLT 5008-5500: wait at least 15 minutes
4
VLT ® 5000 SyncPos option
For the North American market: The ETR func-
tions provide class 20 motor overload protection
in accordance with NEC.
6. Do not remove the plugs for the motor and
mains supply while the VLT frequency converter
is connected to mains. Check that the mains
supply has been disconnected and that the
necessary time has passed before removing
motor and mains plugs.
7 . Please note that the VLT frequency converter
has more voltage inputs than L1, L2 and L3,
when loadsharing (linking of DC intermediate
circuit) and external 24 V DC have been
installed.
Check that all voltage inputs have been discon-
nected and that the necessary time has passed
before repair work is commenced.
I I I I I Warning against unintended start
1. The motor can be brought to a stop by means
of digital commands, bus commands, referen-
ces or a local stop, while the frequency conver-
ter is connected to mains.
If personal safety considerations make it
necessary to ensure that no unintended start
occurs, these stop functions are not sufficient.
2. While parameters are being changed, the motor
may start. Consequently, the stop key [STOP/
RESET] must always be activated, following
which data can be modified.
3. A motor that has been stopped may start if
faults occur in the electronics of the VLT
frequency converter, or if a temporary overload
or a fault in the supply mains or the motor
connection ceases.
Warning:
MG.10.J4.02 – VLT is a registered Danfoss trade mark