Safety - Danfoss VLT AQUA High Power Operating Instructions Manual

VLT AQUA High Power Operation Instructions

2. Safety

2.1.1. Safety note
Safety Regulations
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Installation at High Altitudes
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 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.
The voltage of the frequency converter is dangerous whenever connected to mains.
Incorrect installation of the motor, frequency converter or fieldbus may cause dam-
age to the equipment, serious personal injury or death. Consequently, the instruc-
tions in this manual, as well as national and local rules and safety regulations, must
be complied with.
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.
The [STOP/RESET] key on the control panel of the frequency converter does not dis-
connect the equipment from mains and is thus not to be used as a safety switch.
Correct protective earthing of the equipment must be established, the user must be pro-
tected against supply voltage, and the motor must be protected against overload in
accordance with applicable national and local regulations.
The earth leakage currents are higher than 3.5 mA.
Protection against motor overload is set by par. 1-90
function is desired, set par. 1-90 to data value [ETR trip] (default value) 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.
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.
Please note that the frequency converter has voltage inputs other than L1, L2 and L3,
when load sharing (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 commencing repair work.
By altitudes above 2 km, please contact Danfoss Drives regarding PELV.
Warning:
Touching the electrical parts may be fatal - even after the equipment has been dis-
connected from mains.
®
MG.20.P1.02 - VLT is a registered Danfoss trademark
Motor Thermal Protection
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2. Safety
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