2-07 Parking Time
Range:
Function:
3 s
*
[0.1 - 60
s]
Set the duration of the parking current time set
in
parameter 2-06 Parking Current
. Active with
NOTICE
is only active
when
[1] PM, non-salient SPM
is selected
in
parameter 1-10 Motor Construction
3.4.2 2-1* Brake Energy Funct.
Parameter group for selecting dynamic brake parameters.
Only valid for frequency converters with brake chopper.
2-10 Brake Function
Option:
Function:
Available selections depend on
parameter 1-10 Motor Construction
[0] Asynchronous
:
•
[0] Off
.
•
[1] Resistor brake
.
•
[2] AC braking
.
[1] PM non-salient
:
•
[0] Off
.
•
[1] Resistor brake
.
[0] Off
No brake resistor installed.
[1] Resistor
brake
Brake resistor incorporated in the system, for
dissipation of surplus brake energy as heat.
Connecting a brake resistor allows a higher DC-
link voltage during braking (generating operation).
The resistor brake function is only active in
frequency converters with an integral dynamic
brake.
[2] AC brake AC braking only works in compressor torque
mode in
parameter 1-03 Torque Characteristics
.
2-11 Brake Resistor (ohm)
Range:
Function:
Size
related
*
[ 5 -
65535
Ohm]
Set the brake resistor value in
Ω
. This value
is used for monitoring the power to the
brake resistor in
. This parameter is only active in
frequency converters with an integral
dynamic brake.
Use this parameter for values without
decimals. For a selection with 2 decimals,
use
parameter 30-81 Brake Resistor (ohm)
2-12 Brake Power Limit (kW)
Range:
Function:
Size
related
*
[ 0.001 -
2000.000
kW]
NOTICE
This parameter is only active in
frequency converters with an
integral dynamic brake.
Set the monitoring limit of the brake
power transmitted to the resistor.
The monitoring limit is a product of the
maximum duty cycle (120 s) and the
maximum power of the brake resistor at
that duty cycle. See the formulas 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 525–600 V units:
P
resistor
= 943
2
× dutytime
R × 120
2-13 Brake Power Monitoring
Option:
Function:
NOTICE
This parameter is only active in
frequency converters with an integral
dynamic brake.
This parameter enables monitoring of the
power to the brake resistor. The power is
calculated based on the resistance
(
parameter 2-11 Brake Resistor (ohm)
), the DC-
link voltage, and the resistor duty time.
[0]
*
Off
No brake power monitoring is required.
If power monitoring is set to
[0] Off
or
[1]
Warning
, the brake function remains active
even if the monitoring limit is exceeded. This
may lead to thermal overload of the resistor.
It is also possible to generate a warning via
a relay/digital output. The measuring
accuracy of the power monitoring depends
on the accuracy of the resistance of the
resistor (better than
±
20%).
[1]
Warning
120s
Activates a warning when the power
transmitted over 120 s exceeds 100% of the
monitoring limit (
The warning disappears when the
transmitted power drops below 80% of the
monitoring limit.
Parameter Description
VLT
®
AQUA Drive FC 202
64
Danfoss A/S © 05/2018 All rights reserved.
MG20OB02
3
3
Summary of Contents for VLT AQUA Drive FC 202
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