HID has unveiled the latest small AC inverter from Hitachi which, while
compact in size, has features of more sophisticated and expensive drives.
The inverter addresses the huge market for small AC motor control.
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Designated the Hitachi L100, the drive is a general purpose unit capable
of handling most AC applications. Single and three-phase models are available
from 0.2kW to 2.2kW in the 200V class and in three-phase from 0.4kW to
7.5kW in the 400V class.
While the L100 is ideal for stand alone motor control applications, Hitachi
has addressed the potential for the products in systems by incorporating
as standard PID control and RS422 communications. There are seven inputs
of which five are programmable and two programmable outputs as well as
an alarm output. Access to the terminal rails is by opening the hinged
front case. There is also the option of a variety of fieldbus communications.
Speed setting is either via a simple potentiometer on the front panel
or by external analogue or digital signals . A standard on board keypad
and LED display is used for programming. The L100 is protected and there
are alarms for overcurrent, over voltage, under voltage, over temperature,
overload, ground fault and so forth. Automatic voltage regulation is included
for output voltage control. There are two acceleration/deceleration ramps
for setting rates between 0.1 and 990 seconds.
The L100 is a truly global product and carries UL and CSA approvals as
well as being CE certificated for low voltage and EMC Directives. All
sizes are immediately available from HID Limited.