2.1.2. High Voltage
The voltage of the adjustable frequency drive is dangerous whenever the adjustable
frequency drive is connected to line power. Incorrect installation or operation of the
motor or adjustable frequency drive may cause damage to the equipment, serious
personal injury or death. The instructions in this manual must therefore be observed,
in addition to applicable local and national rules and safety regulations.
Installation at high altitudes
At altitudes higher than 6,500 ft [2 km], please contact Danfoss Drives regarding
PELV.
2.1.3. Safety Instructions
•
Make sure the adjustable frequency drive is properly grounded.
•
Protect users against supply voltage.
•
Protect the motor against overloading in accordance with national and local regulations.
•
Motor overload protection is not included in the default settings. To add this function,
set parameter 1-90
Motor thermal protection
to value
ETR trip
or
ETR warning
. For the
North American market: ETR functions provide class 20 motor overload protection, in
accordance with NEC.
•
The ground leakage current exceeds 3.5 mA.
•
The [OFF] key is not a safety switch. It does not disconnect the adjustable frequency
drive from line power.
2.1.4. General Warning
Warning:
Touching the electrical parts may be fatal - even after the equipment has been dis-
connected from line power.
Also make sure that other voltage inputs have been disconnected, such as load
sharing (linkage of DC intermediate circuit), as well as the motor connection for
kinetic backup.
When using the adjustable frequency drive: wait at least 40 minutes.
A shorter time is allowed only if indicated on the nameplate for the specific unit.
2. Safety Instructions and General Warning
VLT
®
HVAC DRIVE High Power
Instruction Manual
10
MG.11.F1.22 - VLT
®
is a registered Danfoss trademark.
2
