Danfoss VLT HVAC Series User Manual

Figure 3.3: Controlled ramp-down, longer line failure. Ramping down as long as the energy in the system allows for it, then the motor is
coasted.
Figure 3.4: Kinetic back-up, short line failure. Ride through as long as the energy in the system allows for it.
Figure 3.5: Kinetic back-up, longer line failure. The motor is coasted as soon as the energy in the system is too low.
14-11 Line Voltage at Line Fault
Range: Function:
342. V* [180 - 600 V] This parameter defines the threshold voltage at which the selected function in par.14-10 Line Fail-
ure
should be activated.
3 Parameter Description VLT
®
HVAC Drive Programming Guide
3-136 MG.11.C6.22 - VLT
®
is a registered Danfoss trademark
3

Danfoss VLT HVAC Series Specifications

General

Protection Features	Overcurrent, Overvoltage, Undervoltage, Overtemperature, Short circuit
Communication Interfaces	Profibus, Ethernet
Cooling Method	Forced convection
Ambient Temperature	-10°C to +40°C
Enclosure Rating	IP20, IP21, IP55
Output Voltage	0 - 100% of supply voltage