Danfoss VLT AutomationDrive FC 301 Programming Manual page 112

Parameter Descriptions
4-58 Missing Motor Phase Function
Option:
3 3
The following table details detection of missing motor
phase function for different motor types:
Option Missing
motor phase
function
[0] Disabled
[1] Trip 100 ms
[2] Trip 1000 ms Detects
[3] Trip 100 ms
3 phase limit
[5] Motor check
(service
switch)
Table 3.14 Missing Motor Phase for Different Motor Types
1) When parameter 4-59 is set to option [1] or option [3] phase
detection is enabled for U/f and VVC
4-59 Motor Check At Start
Option:
110
®
VLT AutomationDrive FC 301/302
Function:
CAUTION
The motor automatically
resumes operation when the
motor is connected again.
NOTICE
Valid for FC 302 only.
U/f Flux
+
VVC
open
loop
No function
Detects Detects Detects
missing 1 missing 1 1-3
phase
phase 1) phase 1)
Detects Detects
missing 1 missing 1 1-3
phase
phase 1) phase 1)
N/A
Coasts if motor is disconnected or auto
started when motor is reconnected.
+
motor types.
Function:
NOTICE
This parameter cannot be
adjusted while the motor is
running.
NOTICE
Valid for FC 302 only.
This function detects missing motor
phase before each start. Shows
alarm 30, alarm 31, alarm 32 in case
of missing motor phases. In these
cases, the drive trips and an alarm
is issued.
The function has been developed
to avoid disengaging a mechanical
Danfoss A/S © 10/2019 All rights reserved.
4-59 Motor Check At Start
Option:
[0] Off
*
[1] On
Flux
closed
loop
Detects
1-3
phase
N/A
The table details the motor check at Start for different
motor modes.
Detects
1-3
phase
Option Motor
Check at
Start
[0] Off
[1]
On 1)
Table 3.15 Motor Check at start for Different Motor Types
1) When the motor check is done at start and a missing motor phase
is detected, the motor starts at trip 100 ms. This means that
parameter 4-58 is set to option [1].
When parameter 4-59 Motor Check At Start is set to [1] On,
do not set parameter 4-58 Missing Motor Phase Function to
the following options:
•
[0] Disabled.
•
[5] Motor check.
Function:
brake if motor phases are missing,
for example, in lift applications.
See also chapter 3.5.5 Combinations
of parameters 4-58 and 4-59.
CAUTION
RISK OF MOTOR DAMAGE
Using this option may lead to
motor damage.
The frequency convertor does not
issue a missing motor phase alarm.
Before each start, the frequency
convertor checks if all 3 motor
phases are present. The check is
performed without any shaft
movement. The function also
enables 3-phase detection in U/f
and VVC+ mode. See description in
parameter 4-58 Missing Motor Phase
Function.
U/f Flux Flux
+
VVC
open closed
loop loop
No function
Check for missing motor phase before
start is executed or enables 3-phase
+
detection for U/f and VVC
inparameter 4-58 Missing Motor Phase
Function.
M0013101