vi

CAUTION: Remarks for using ground fault interrupter breakers in the

..... 2–17

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 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.

 

CAUTION: Be sure to install a fuse for each phase of the main power

..... 2–17

supply to the inverter. Otherwise, there is the danger of fire.

 

CAUTION: For motor leads, ground fault interrupter breakers and

..... 2–17

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.

 

Powerup Test Caution Messages

CAUTION: The heat sink fins will have a high temperature. Be careful

..... 2–20

not to touch them. Otherwise, there is the danger of getting burned.

 

CAUTION: The operation of the inverter can be easily changed from low

..... 2–20

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.