4.19.3 22-6* Broken-belt Detection
Use broken-belt detection in both closed-loop systems and
open-loop systems for pumps and fans. If the estimated
motor torque (current) is below the broken-belt torque
(current) value (
parameter 22-61 Broken Belt Torque
), the
frequency converter output frequency is above or equal to
15 Hz, and the condition has been active for
parameter 22-62 Broken Belt Delay
,
parameter 22-60 Broken
Belt Function
is performed.
22-60 Broken Belt Function
Option:
Function:
Select the actions to be performed
if the broken-belt condition is
detected.
[0]
*
Off
[1]
Warning
The frequency converter continues
to run, but activates
warning 95,
Broken belt
. A frequency converter
digital output or a serial communi-
cation bus communicates a warning
to other equipment.
[2]
Trip
The frequency converter stops
running and activates
alarm 95,
Broken belt
. A frequency converter
digital output or a serial communi-
cation bus communicates an alarm
to other equipment.
[3]
Stop and Trip
22-61 Broken Belt Torque
Range:
Function:
10 %
*
[0 - 100 %]
Set the broken-belt torque as a
percentage of the rated motor
torque.
22-62 Broken Belt Delay
Range:
Function:
10 s
*
[0 - 600 s]
Set the time for which the broken-
belt conditions must be active
before carrying out the action
selected in
parameter 22-60 Broken
Belt Function
.
4.20 Parameters: 30-** Special Features
4.20.1 30-2* Adv. Start Adjust
30-20 High Starting Torque Time [s]
Range:
Function:
Size
related
*
[0 - 60 s]
This function is active together with
speed control closed loop. In order
to obtain a high starting torque,
approximately 2 x I
VLT,N
for
30-20 High Starting Torque Time [s]
Range:
Function:
maximum 0.5 s. However, the
current is limited by the protection
limit of the frequency converter.
30-21 High Starting Torque Current [%]
Range:
Function:
Size
related
*
[ 0 - 200.0 %] High starting torque current for PM
motor in VVC
+
mode without
feedback.
30-22 Locked Rotor Protection
Option:
Function:
Available for PM motors only, in
VVC
+
open-loop mode.
[0]
Off
[1]
On
Protects the motor from the locked
rotor condition. The control
algorithm detects a possible locked
rotor condition in the motor and
trips the frequency converter to
protect the motor.
30-23 Locked Rotor Detection Time [s]
Range:
Function:
Size
related
*
[0.05 - 1 s]
Time period for detecting the
locked rotor condition. A low
parameter value leads to faster
detection.
30-24 Locked Rotor Detection Speed Error [%]
Range:
Function:
25 %
*
[0 - 100 %]
4.21 Parameters: 40-** Special Settings
40-40 Fault Log: Ext. Reference
Range:
Function:
0 %
*
[-200 -
200 %]
View the present reference value
applied on impulse or analog basis,
when the logged event occurred.
40-41 Fault Log: Frequency
Range:
Function:
0 Hz
*
[0 - 6500 Hz] View the actual motor frequency
value, when the logged event
occurred.
40-42 Fault Log: Current
Range:
Function:
0 A
*
[0 - 10000 A] View the motor current measured
when the logged event occurred.
Parameter Descriptions
Programming Guide
MG06J202
Danfoss A/S © 03/2019 All rights reserved.
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Summary of Contents for VLT AutomationDrive FC 361
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