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CAUTION: Remarks for using ground fault interrupter breakers in the main power
supply: Adjustable frequency inverter with integrated CE-filters and shielded
(screened) motor cables have a higher leakage current toward earth GND.
Especially at the moment of switching ON this can cause an inadvertent trip of
ground fault interrupters. Because of the rectifier on the input side of the inverter
there is the possibility to stall the switch-off function through small amounts of DC
current.
Please observe the following:
x Use only short time-invariant and pulse current-sensitive ground fault
interrupters with higher trigger current.
x Other components should be secured with separate ground fault interrupters.
x Ground fault interrupters in the power input wiring of an inverter are not an
absolute protection against electric shock.
… 2-20
CAUTION: Be sure to install a fuse in each phase of the main power supply to the
inverter. Otherwise, there is the danger of fire.
… 2-20
CAUTION: For motor leads, ground fault interrupter breakers and electromagnetic
contactors, be sure to size these components properly (each must have the capacity
for rated current and voltage). Otherwise, there is the danger of fire.
… 2-20
Powerup Test Caution Messages
CAUTION: The heat sink fins will have a high temperature. Be careful not to touch
them. Otherwise, there is the danger of getting burned.
… 2-23
CAUTION: The operation of the inverter can be easily changed from low speed to
high speed. Be sure to check the capability and limitations of the motor and
machine before operating the inverter. Otherwise, there is the danger of injury.
… 2-23
CAUTION: If you operate a motor at a frequency higher than the inverter standard
default setting (50Hz/60Hz), be sure to check the motor and machine specifications
with the respective manufacturer. Only operate the motor at elevated frequencies
after getting their approval. Otherwise, there is the danger of equipment damage
and/or injury.
… 2-23
… 2-29
CAUTION: Check the following before and during the Powerup test. Otherwise,
there is the danger of equipment damage.
x Is the shorting bar between the [+1] and [+] terminals installed? DO NOT power
or operate the inverter if the jumper is removed.
x Is the direction of the motor rotation correct?
x Did the inverter trip during acceleration or deceleration?
x Were the rpm and frequency meter readings as expected?
x Were there any abnormal motor vibration or noise?
… 2-23
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