2 Safety and Conformity
2.1 Safety
2.1.1 Safety Note
WARNING
DANGEROUS VOLTAGE
The voltage of the frequency converter is dangerous
whenever connected to mains. Incorrect installation of the
motor, frequency converter or fieldbus may cause death,
serious personal injury or damage to the equipment.
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 discon-
nected and that the necessary time has passed
before removing motor and mains plugs.
2.
The [STOP/RESET] key on the LCP 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
3.5mA.
5.
Protection against motor overload is set by
1-90 Motor Thermal Protection
. If this function is
desired, set
1-90 Motor Thermal Protection
to data
value [ETR trip] (default value) or data value [ETR
warning]. Note: The function is initialized 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.
Check that all voltage inputs have been discon-
nected and that the necessary time has passed
before commencing repair work.
Installation at high altitudes
CAUTION
At altitudes above 2km, please contact Danfoss regarding
PELV.
WARNING
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 consider-
ations 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.
WARNING
DISCHARGE TIME
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, load sharing (linkage of DC intermediate
circuit), as well as the motor connection for kinetic back
up.
The frequency converter DC link capacitors remain charged
after power has been disconnected. To avoid an electrical
shock hazard, disconnect the frequency converter from the
mains before carrying out maintenance. Before touching
any potentially live parts of the frequency converter, wait
at least 4 minutes for M1, M2 and M3 sizes. Wait at least
15 minutes for all M4 and M5 sizes.
2.1.2 Disposal Instruction
Equipment containing electrical
components may not be disposed of
together with domestic waste.
It must be separately collected with
electrical and electronic waste according
to local and currently valid legislation.
Safety and Conformity
VLT Micro Drive Design Guide
10
MG02K102 - VLT
®
is a registered Danfoss trademark
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