Derating Curve For Ambient Temperature And Carrier Frequency; Ambient Temperature Derating Curve; Carrier Frequency Derating Curve - Delta VFD-EL-W Series User Manual

A5. Derating Curve for Ambient Temperature and Carrier Frequency

Ambient Temperature Derating Curve

Model
VFD007EL21W(-1)
Other models
Other models: VFD002EL21W(-1), VFD004EL21W(-1), VFD015EL21W(-1), VFD022EL21W(-1),
VFD004EL43W(-1), VFD007EL43W(-1), VFD015EL43W(-1), VFD022EL43W(-1), VFD040EL43W(-1)

Carrier Frequency Derating Curve

Model
VFD007EL21W(-1)
Other models
Ambient temperature (°C)
If the AC motor drive operates at the rated current, the ambient temperature needs
to be between -10–40°C. If the temperature is above 40°C, decrease 2% of the
rated current for every 1°C increase in temperature. The maximum allowable
temperature is 50°C.
If the AC motor drive operates at the rated current, the ambient temperature needs
to be between -10–50°C. If the temperature is above 50°C, decrease 2% of the
rated current for every 1°C increase in temperature. The maximum allowable
temperature is 60°C.
Carrier frequency (kHz)
If the AC motor drive is installed at an ambient temperature of 40°C, and operates
at the rated current, the carrier frequency needs to be within 8 kHz. If the carrier
frequency is higher than 8 kHz, decrease 5% of the rated current for every 1 kHz
increase in the carrier frequency. The maximum allowable carrier frequency is 12
kHz.
If the AC motor drive is installed at an ambient temperature of 50°C, and operates
at the rated current, the carrier frequency needs to be within 8 kHz. If the carrier
frequency is higher than 8 kHz, decrease 5% of the rated current for every 1 kHz
increase in the carrier frequency. The maximum allowable carrier frequency is 12
kHz.
Other models
Ambient Temperature Limitation
Other models 50°C
Carrier Frequency Limitation
Appendix A Specifications VFD-EL-W

All models 25°C
A-5