1–12

Inverter Specifications

Getting Started

Derating Curves

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 “Ensure Adequate Ventilation” on page 2–11 for minimum clearance dimensions for both mounting configurations.

Individual Mounting

 

 

Side-by-side Mounting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Enclosure

 

 

 

 

 

Enclosure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER

 

 

 

 

HITACHI

 

POWER

 

 

 

 

HITACHI

 

POWER

 

 

 

 

HITACHI

 

 

 

 

 

 

ALARM

 

 

 

 

 

ALARM

 

 

 

 

 

ALARM

 

 

 

 

 

 

Hz

 

 

 

 

 

50.0

Hz

 

 

 

 

 

50.0

Hz

 

 

 

 

5 0.0

A

 

 

 

 

 

 

 

A

 

 

 

 

 

 

 

A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RUN

 

 

 

 

 

 

 

 

 

RUN

 

 

 

 

 

 

 

 

 

RUN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RUN

STOP PRG

 

 

 

 

 

 

 

RUN

STOP PRG

 

 

 

 

 

 

 

RUN

STOP PRG

 

 

 

 

 

 

 

RESET

 

 

 

 

 

 

 

RESET

 

 

 

 

 

 

 

 

RESET

 

 

 

 

 

 

 

FUNC. 1 2

STR

 

 

 

 

 

FUNC. 1 2 STR

 

 

 

 

 

 

 

FUNC.

1 2

STR

 

 

 

 

 

L2002

 

 

 

 

 

L2002

 

 

 

 

 

 

 

 

L2002

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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 L2002 inverter model number.

Legend for Graphs:

Ambient temperature 40°C max., individual mounting

Ambient temperature 50°C max., individual mounting

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