ABB ACS380 User Manual

Switching frequency derating: Derating is not necessary at 4 kHz.
Altitude derating: The derating factor for 6000 ft is
Surrounding air temperature derating: The derating factor for 131 °F surrounding air
temperature is
Multiply the drive output current by all the applicable derating factors. In this example,
the derated output current becomes
Example 2, IEC: How to calculate the required drive
The application requires a nominal motor current of 6.0 A at a switching frequency of
8 kHz. The supply voltage is 400 V, the altitude is 1800 m and the surrounding air
temperature is 35 °C.
Altitude derating: The derating factor for 1800 m is .
Surrounding air temperature derating: Derating is not necessary at 35 °C surrounding
air temperature.
To see if the derated output current of a drive is sufficient for the application, multiply
the nominal output current (I
N
) by all the applicable derating factors. For example, drive
type ACS380-04xx-12A6-4 has a nominal output current of 12.6 A at 400 V. The switching
frequency derating factor for this drive type is 0.68 at 8 kHz. Calculate the derated drive
output current:
In this example, the derated output current is sufficient, because it is higher than the
required current.
Example 2, UL (NEC): How to calculate the required drive
The application requires a maximum of 12.0 A of motor current with a 10% overload for
one minute every ten minutes (I
Ld
) at a switching frequency of 8 kHz. The supply voltage
is 480 V, the altitude is 5500 ft and the surrounding air temperature is 95 °F.
Altitude derating: The derating factor for 5500 ft is .
Surrounding air temperature derating: Derating is not necessary at 95 °F surrounding
air temperature.
To see if the derated output current of a drive is sufficient for the application, multiply
the drive output current for light-duty use (I
Ld
) by all the applicable derating factors. For
example, drive type ACS380-04xx-25A0-4 has an output current of 21 A at 480 V. The
switching frequency derating for this drive type is 0.67 at 8 kHz. Calculate the derated
drive output current:
132 Technical data

ABB ACS380 Specifications

General

Mounting	Wall-mounted
Enclosure Class	IP20
Built-in Features	Braking chopper
Communication	Modbus RTU
Protection Features	Overcurrent, overvoltage, undervoltage, short circuit, ground fault
Operating Temperature	-10°C to +50°C
Storage Temperature	-40°C to +70°C
Humidity	5 to 95% relative humidity, non-condensing
Control Method	Scalar control, vector control