VLT® 5000 Crane
■
Safety
The voltage of the frequency converter
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
■
Safety Regulations
1. The frequency converter must be disconnected
from mains if repair work is to be carried out. Check
that the mains supply has been disconnected
and that the necessary time has passed before
removing motor and mains plugs.
2. The [STOP/RESET] key on the control panel of
the 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
applicable 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
.
Note: The function is initialised at 1.16 x rated
motor current and rated motor frequency. For
the North American market: The ETR functions
provide class 20 motor overload protection
in accordance with NEC.
6. Do not remove the plugs for the motor and mains
supply while the 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 frequency converter has more
voltage inputs than L1, L2 and L3, when loadsharing
terminals (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.
■
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 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 frequency converter,
or if a temporary overload or a fault in the supply
mains or the motor connection ceases.
4. Immediate stop. Direct stop input (term. 37). When
contact is open, the drive will stop (coast).
175ZA523.11
Warning:
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 5042-5062: wait at least 15 minutes.
Using VLT 5072-5202: wait at least 20 minutes.
MG.50.N4.02 - VLT is a registered Danfoss trademark
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