EasyManuals Logo

Danfoss VLT HVAC Series User Manual

Danfoss VLT HVAC Series
338 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #55 background imageLoading...
Page #55 background image
2-03 DC Brake Cut-in Speed [RPM]
Range: Function:
0 RPM* [0 - par. 4-13 RPM] Set the DC brake cut-in speed for activation of the DC braking current set in par.2-01
DC Brake
Current
, upon a stop command.
3.4.2 2-1* Brake Energy Funct.
Parameter group for selecting dynamic braking parameters.
2-10 Brake Function
Option: Function:
[0] * Off No brake resistor installed.
[1] Resistor brake Brake resistor incorporated in the system, for dissipation of surplus braking energy as heat. Con-
necting a brake resistor allows a higher DC link voltage during braking (generating operation). The
resistor brake function is only active in adjustable frequency drives with an integral dynamic brake.
[2] AC brake
2-11 Brake Resistor (ohm)
Range: Function:
50. Ohm* [5. - 32000. Ohm] Set the brake resistor value in Ohms. This value is used for monitoring the power to the brake
resistor in par.2-13
Brake Power Monitoring
. This parameter is only active in adjustable frequency
drives with an integral dynamic brake.
If the selection is xxxx use this parameter. If the selection is xxx.xx, use par. 3-81
Quick Stop Ramp
Time
.
2-12 Brake Power Limit (kW)
Range: Function:
5.000 kW* [0.001 - 500.000 kW] Set the monitoring limit of the braking energy transmitted to the resistor.
The monitoring limit is a product of the maximum duty cycle (120 sec.) and the maximum power
of the brake resistor at that duty cycle. See the formula below.
For 200–240 V units:
P
resistor
=
390
2
×
dutytime
R
× 120
For 380–480 V units
P
resistor
=
778
2
×
dutytime
R
× 120
For 380–500 V units
P
resistor
=
810
2
×
dutytime
R
× 120
For 575–600 V units
P
resistor
=
943
2
×
dutytime
R
× 120
This parameter is only active in adjustable frequency drives with an integral dynamic brake.
VLT
®
HVAC Drive Programming Guide 3 Parameter Description
MG.11.C6.22 - VLT
®
is a registered Danfoss trademark
3-31
3

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Danfoss VLT HVAC Series and is the answer not in the manual?

Danfoss VLT HVAC Series Specifications

General IconGeneral
Protection FeaturesOvercurrent, Overvoltage, Undervoltage, Overtemperature, Short circuit
Communication InterfacesProfibus, Ethernet
Cooling MethodForced convection
Ambient Temperature-10°C to +40°C
Enclosure RatingIP20, IP21, IP55
Output Voltage0 - 100% of supply voltage

Related product manuals