Danfoss VLT User Manual

NOTE!
Voltages of up to 975 V DC (@ 600 V AC) may occur between the terminals.
Figure 4.29: Brake connection terminal for B3. Figure 4.30: Brake connection terminal for B4.
Figure 4.31: Brake connection terminal for C3. Figure 4.32: Brake connection terminal for C4.
NOTE!
If a short circuit in the brake IGBT occurs, prevent power dissipation in the brake resistor by using a line switch or contactor to disconnect
the line power from the adjustable frequency drive. Only the adjustable frequency drive should control the contactor.
NOTE!
Place the brake resistor in an environment free of fire risk and ensure that no external objects can fall into the brake resistor through
ventilation slots.
Do not cover ventilation slots and grids.
VLT
®
HVAC Drive Instruction Manual 4 Electrical installation
MG.11.A9.22 - VLT
®
is a registered Danfoss trademark 4-19
4

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)