Chapter: H.1. Conditions of safe operations
H.1.2. Basic rules
•
Don’t connect mains voltage to output terminals U, V, W.
•
Don’t measure the voltage endurance of any unit drives.
•
To measure the cables insulation it is necessary to disconnect them from the drive.
•
Do not try to repair the unit yourself. Any repairs must be performed only by authorized service.
Any modifications or self-repairs of the drive can cause physical injury, death, or damage to the drive
and the connected equipment. Any attempt at unauthorised repairs will void any warranty.
•
Don’t touch integrated circuits and any other parts on the drive’s electronic board.
•
Don't connect any capacitors to motor wires (e.g. intended for improvement of power factor).
•
Don't measure output voltage of a converter using digital voltmeters without low-pass filter. The voltage
can only be measured correctly with an electromagnetic voltmeter.
•
The drive is not designed to operate with periodically switched on/off supply voltage.
•
If the electric motor runs at low speed (below 25 Hz), additional cooling of the motor is necessary.
H.1.3. Operation list
The operations applied at installation and the first start-up of the drive
1.
After unpacking the converter, it is necessary to check up visually the presence of damages which
could arise during transport.
2.
Check whether the delivery is in accordance with the order - check the nameplate.
3.
Check up the correspondence between the conditions in which the converter will be used and
conditions of an environment for which it is designed (section H.1.4).
4.
Installation of the frequency converter should be made due to the principles of safety and EMC rules.
5.
Perform the configuration of the converter in accordance with the chapters of this manual.
H.1.4. Environmental conditions
Degree of pollution
The second degree of pollution has been assumed during the design, at which there are normally only non-
conducting pollution. However, there is a probability of temporary conductivity caused by a condensation,
when the converter is disconnected from the voltage source.
In case the environment in which the frequency converter will work contains pollution, which can influence its
safety, it is necessary to apply appropriate counteraction, using, for example, additional cases, air channels,
filters etc.
Climatic conditions
Installation site
During warehousing
During transport
Temperature
from -10°C to +50°C
-25°C to +55°C
-25°C to +70°C
Protective packing
Relative humidity
from 5% to 95%
from 5% to 95%
to 95%
Short-term, insignificant condensation on the external side of the converter case is
permitted only when the converter is disconnected from the voltage source.
Air pressure
from 86 kPa to 106 kPa
from 86 kPa to 106 kPa
from 70 kPa to 106 kPa
1) For nominal load temperature 40
o
C was assumed; however, for lower loads higher temperatures are acceptable.
MFC1000AcR, TWERD Power Electronics
5
