Danfoss VLT Programming Guide

Illustration 3.3: Controlled Ramp-down, longer mains failure. Ramping down as long as the energy in the system allows for it, then the motor
is coasted.
Illustration 3.4: Kinetic Back-up, short mains failure. Ride through as long as the energy in the system allows for it.
Illustration 3.5: Kinetic Back-up, longer mains failure. The motor is coasted as soon as the energy in the system is too low.
14-11 Mains Voltage at Mains Fault
Range: Function:
Application
dependent*
[180 - 600 V] This parameter defines the threshold voltage at which the selected function in par. 14-10 Mains
Failure
should be activated.
3 Parameter Description VLT
®
HVAC Drive Programming Guide
148 MG.11.C9.02 - VLT
®
is a registered Danfoss trademark
3

Danfoss VLT Specifications

General

Frequency	50/60 Hz
Enclosure	IP20, IP21, IP55, IP66
Series	VLT
Control Technique	Flux Vector Control
Output Voltage	0-Vinput
Control Method	Fieldbus
Communication Interface	PROFIBUS, CANopen
Protection Features	Overload, Overvoltage, Undervoltage, Short Circuit, Ground Fault
Cooling Method	Liquid Cooled
Storage Temperature	-25°C to +70°C
Relative Humidity	5-95% non-condensing
Altitude	Up to 1000m (3280ft) without derating, up to 4000m (13120ft) with derating
Operating Temperature	-10°C to +50°C (14°F to 122°F)