General Warning - Danfuss VLT 5000 Series Manual

I General warning
The voltage of the frequency converter is
dangerous whenever the converter is con-
nected to mains. Incorrect fitting of the
motor or frequency converter may cause damage to
the equipment, serious injury or death. Conse-
quently, it is essential to comply with the instructions
in this manual as well as local and national rules and
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 dis-
connected and that the necessary time has
passed before removing motor and mains plugs.
2. The [STOP/RESET] or [OFF/STOP] key on the
control panel of the VLT frequency converter
does not disconnect 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 protected
against supply voltage, and the motor must be
protected against overload in accordance with ap-
plicable national and local regulations.
4. The earth leakage currents are higher than 3.5
mA.
5. Protection against motor overload is not included
in the factory setting. If this function is desired,
set parameter 128 to data value ETR trip or data
value ETR warning. On VLT 6000, set parameter
117 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
Operating manual).
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 5300-5500 / 6350-6550: wait at least 15 minutes
2
®
VLT 5000/6000 Series
For the North American market: The ETR functions
provide class 20 motor overload protection in ac-
cordance with NEC.
6. Do not remove the plugs for the motor and mains
supply while the VLT frequency converter is con-
nected 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 disconnected
and that the necessary time has passed before
repair work is commenced.
I Warning against unintended start
1. The motor can be brought to a stop by means of
digital commands, bus commands, references or
a local stop, while the frequency converter is con-
nected to mains. If personal safety considerations
make it necessary to ensure that no unintended
start occurs, these stop functions are not suffi-
cient.
2. While parameters are being changed, the motor
may start. Consequently , the stop key [STOP/RE-
SET] or [OFF/STOP] 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 frequency con-
verter, or if a temporary overload or a fault in the
supply mains or the motor connection ceases.
Warning:
MG.56.A1.02 - VLT is a registered Danfoss trade mark