Danfoss VLT HVAC Drive User Manual

B enclosures
60 PWM (Pulse Width Modulation)
Illustration 8.5: Derating of I
out
for different T
AMB,
MAX
for enclosure B, using 60 PWM in normal tor-
que mode (110% over-torque)
SFAVM - Stator Frequency Asyncron
Vector Modulation
Illustration 8.6: Derating of I
out
for different T
AMB,
MAX
for enclosure B, using SFAVM in normal torque
mode (110% over-torque)
C enclosures
60 PWM (Pulse Width Modulation)
Illustration 8.7: Derating of I
out
for different T
AMB,
MAX
for enclosure C, using 60 PWM in normal tor-
que mode (110% over-torque)
SFAVM - Stator Frequency Asyncron
Vector Modulation
Illustration 8.8: Derating of I
out
for different T
AMB,
MAX
for enclosure C, using SFAVM in normal torque
mode (110% over-torque)
8.2.3. Derating for Low Air Pressure
The cooling capability of air is decreased at a lower air pressure.
At altitudes higher than 6,600 feet [2 km], please contact Danfoss Drives regarding PELV.
At an altitude lower than 3,280 ft [1,000 m], no derating is necessary; but at an altitude higher
than 3,280 ft [1,000 m], the ambient temperature (T
AMB
) or max. output current (I
out
) should be
derated in accordance with the diagram shown.
8. Specifications VLT
®
HVAC Drive Instruction Manual
150 MG.11.A4.22 - VLT
®
is a registered Danfoss trademark
8

Danfoss VLT HVAC Drive Specifications

General

Type	VLT HVAC Drive
STO (Safe Torque Off)	Yes
Enclosure	IP20
Output Frequency	0-500 Hz
Brake Chopper	Built-in (depending on frame size)
EMC Filter	Built-in (depending on frame size)
Communication	Ethernet
Power Range	0.37 kW to 630 kW
Input Voltage	200-240V, 380-480V, 525-600V
Protection Features	Overload, Overvoltage, Undervoltage, Short Circuit, Ground Fault
Ambient Temperature	-10°C to +50°C (with derating above +40°C)
Storage Temperature	-25°C to +70°C
Relative Humidity	5-95% (non-condensing)
Cooling Method	Air-cooled