Danfoss VLT AutomationDrive FC 302, Руководство по программированию, Страница: 96 / 346

4-58 Missing Motor Phase Function
Option: Function:
This option is a reduced version of option [1] Trip
100 ms .
1-phase missing is handled as in option [1] Trip
100 ms . 3-phase detection is reduced compared
to option [1] Trip 100 ms .
The 3-phase detection is only working at start-up
and in the low speed range where a significant
current is running, avoiding false trips during
small motor current.
NOTICE
Only available for FC 302 flux closed loop.
[5] Motor
Check
The frequency converter detects automatically
when the motor is disconnected and resumes
operation once the motor is connected again.
NOTICE
Valid for FC 302 only.
4-59 Motor Check At Start
Option: Function:
NOTICE
This parameter cannot be adjusted while the
motor is running.
NOTICE
Valid for FC 302 only.
Use this parameter to detect the missing motor phase
during motor standstill. Shows
alarm 30, Motor phase U
missing , alarm 31, Motor phase V missing , or alarm 32,
Motor phase W missing in the event of a missing motor
phase during standstill. Use this function before
disengaging a mechanical brake. Enable this function
to avoid motor damage.
See also
chapter 3.5.5 Combinations of parameters 4-58
and 4-59 .
[0]
*
Off
CAUTION
RISK OF MOTOR DAMAGE
Using this option may lead to motor damage.
The frequency converter does not issue a missing
motor phase alarm.
[1] On Before each start, the frequency converter checks if all
3 motor phases are present. The check is performed
without any movement on ASM motors. For PM and
SynRM motors, the check is performed as part of the
position detection.
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 .
3.5.5 4-6* Speed Bypass
Some systems require that certain output frequencies or
speeds are avoided due to resonance problems in the
system. A maximum of 4 frequency or speed ranges can
be avoided.
4-60 Bypass Speed From [RPM]
Array [4]
Range: Function:
Size related
*
[ 0 - par.
4-13 RPM] Some systems call for avoiding
certain output speeds due to
resonance problems in the system.
Enter the lower limits of the speeds
to be avoided.
4-61 Bypass Speed From [Hz]
Array [4]
Range: Function:
Size related
*
[ 0 - par.
4-14 Hz] Some systems require that certain
output frequencies or speeds are
avoided due to resonance problems
in the system. Enter the lower limits
of the speeds to be avoided.
4-62 Bypass Speed To [RPM]
Array [4]
Range: Function:
Size related
*
[ 0 - par.
4-13 RPM] Some systems call for avoiding
certain output speeds due to
resonance problems in the system.
Enter the upper limits of the speeds
to be avoided.
4-63 Bypass Speed To [Hz]
Array [4]
Range: Function:
Size related
*
[ 0 - par.
4-14 Hz] Some systems call for avoiding
certain output speeds due to
resonance problems in the system.
Enter the upper limits of the speeds
to be avoided.
Parameter Descriptions
VLT
®
AutomationDrive FC 301/302
94 Danfoss A/S © 10/2018 All rights reserved. MG33MP02
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