2–20

Step-by-Step Basic Installation

Inverter Mounting

and Installation

 

 

CAUTION: Be sure that the input voltage matches the inverter specifications:

Single/Three phase 200 to 240 V 50/60 Hz (up to 2.2kW) for NFEF/NFU models

Three phase 200 to 240V 50/60Hz (above 2.2kW) for LFU models

Three phase 380 to 480 V 50/60Hz for HFEF models

CAUTION: If you power a 3-phase-only inverter with single phase power, you must derate the output current. Be sure to call your Hitachi distributor for assistence. Other- wise, there is the possibility of damage to the inverter and the danger of fire.

CAUTION: Be sure not to connect an AC power supply to the output terminals. Other- wise, there is the possibility of damage to the inverter and the danger of injury and/or fire.

L2002 Inverter

Power Input

Output to Motor

 

 

 

 

 

 

 

 

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 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 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 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.