Hitachi WJ200-001L, Instruction Manual, Page: 10 / 680

vii
CAUTION CAUTION CAUTION 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:
•
Use only short time-invariant and pulse current-sensitive ground fault
interrupters with higher trigger current.
•
Other components should be secured with separate ground fault interrupters.
•
Ground fault interrupters in the power input wiring of an inverter are not an
absolute protection against electric shock.
… 2-20
CAUTION CAUTION CAUTION 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
CAUTION CAUTION
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 CAUTION CAUTION 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
CAUTION CAUTION
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 CAUTION CAUTION 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
CAUTION CAUTION
CAUTION: Check the following before and during the Powerup test. Otherwise,
there is the danger of equipment damage.
•
Is the shorting bar between the [+1] and [+] terminals installed? DO NOT power
or operate the inverter if the jumper is removed.
•
Is the direction of the motor rotation correct?
•
Did the inverter trip during acceleration or deceleration?
•
Were the rpm and frequency meter readings as expected?
•
Were there any abnormal motor vibration or noise?
… 2-23