Hitachi SJ300-037HFE Benutzerhandbuch

Hitachi

vi

CAUTION: Fasten the screws with the specified fastening torque in the
table below. Check for any loosening of screws. Otherwise, there is the
danger of fire.

.............

CAUTION: Remarks for using ground fault interrupter breakers in the main
power supply: Adjustable frequency inverters with CE-filters (RFI-filter)
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 interrupter breakers. 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 follow-
ing: • Use only short time-invariant and pulse current-sensitive ground fault
interrupter breakers with higher trigger current. • Other components should
be secured with separate ground fault interrupter breakers. • Ground fault
interrupter breakers in the power input wiring of an inverter are not an
absolute protection against electric shock.

.............

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.

.............

CAUTION: For motor leads, ground fault interrupter breakers and electro-
magnetic 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.

.............

CAUTION: Failure to remove all vent opening covers before electrical
operation may result in damage to the inverter.

.............

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.

.............

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.

.............

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 to personnel.

.............

CAUTION: Check the following before and during the powerup test. Other-
wise, there is the danger of equipment damage. • Is the shorting bar between
the [P] and [PD] 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
vibrations or noise?

.............