Справочник Пользователя для Hitachi L2002

Inverter Specifications

Getting Star

ted

The maximum available inverter current output is limited by the carrier frequency and 
ambient temperature. The carrier frequency is the inverter’s internal power switching 
frequency, settable from 2 kHz to 14 kHz. Choosing a higher carrier frequency tends to 
decrease audible noise, but it also increases the internal heating of the inverter, thus 
decreasing (derating) the maximum current output capability. Ambient temperature is 
the temperature just outside the inverter housing—such as inside the control cabinet 
where the inverter is mounted. A higher ambient temperature decreases (derates) the 
inverter’s maximum current output capacity.

An inverter may be mounted individually in an enclosure or side-by-side with other 
inverter(s) as shown below. Side-by-side mounting causes greater derating than 
mounting inverters separately. Graphs for either mounting method are included in this 
section. Refer to 

 for minimum clearance 

dimensions for both mounting configurations.

Use the following derating curves to help determine the optimal carrier frequency setting 
for your inverter and find the output current derating. Be sure to use the proper curve for 
your particular L200

2

 inverter model number. 

Enclosure

Enclosure

1

2

RESET

FUNC.

STR

POWER

ALARM

RUN

A

Hz

PRG

5 0.0

1

2

RESET

FUNC.

STR

POWER

ALARM

RUN

A

Hz

PRG

5 0.0

1

2

RESET

FUNC.

STR

POWER

ALARM

RUN

A

Hz

PRG

5 0.0

Ambient temperature 40°C max., individual mounting

Ambient temperature 50°C max., individual mounting

Ambient temperature 40°C max., side-by-side mounting