2-13 Brake Power Monitoring
Option:
Function:
[2]
Trip 120s
Trips the frequency converter and shows an
alarm when the calculated power exceeds
100% of the monitoring limit.
[3]
Warning &
trip 120s
Activates both of the above, including
warning, trip, and alarm.
[4]
Warning 30s
[5]
Trip 30s
[6]
Warning &
trip 30s
[7]
Warning 60s
[8]
Trip 60s
[9]
Warning &
trip 60s
[10] Warning
300s
[11] Trip 300s
[12] Warning &
trip 300s
[13] Warning
600s
[14] Trip 600s
[15] Warning &
trip 600s
2-15 Brake Check
Option:
Function:
NOTICE
Remove a warning arising with
[0] Off
or
[1] Warning
by cycling the mains supply.
Correct the fault first. For
[0] Off
or
[1]
Warning
, the frequency converter keeps
running even if a fault is found.
Select the type of test and monitoring function
to check the connection to the brake resistor, or
whether a brake resistor is present, and then
show a warning or an alarm if a fault occurs. The
brake resistor disconnection function is tested
during power-up. However, the brake IGBT test is
performed when there is no braking. A warning
or trip disconnects the brake function.
The testing sequence is as follows:
1.
Measure the DC-link ripple amplitude
for 300 ms without braking.
2.
Measure the DC-link ripple amplitude
for 300 ms with the brake turned on.
3.
If the DC-link ripple amplitude while
braking is lower than the DC-link ripple
amplitude before b1%, the
brake check fails. If brake check fails, a
warning or alarm is returned.
2-15 Brake Check
Option:
Function:
4.
If the DC-link ripple amplitude while
braking is higher than the DC-link ripple
amplitude before b1%, the
brake check is OK.
[0]
*
Off
Monitors brake resistor and brake IGBT for a
short circuit during operation. If a short circuit
occurs, a warning appears.
[1] Warning
Monitors brake resistor and brake IGBT for a
short circuit and runs a test for brake resistor
disconnection during power-up.
[2] Trip
Monitors for a short circuit or disconnection of
the brake resistor, or a short circuit of the brake
IGBT. If a fault occurs, the frequency converter
cuts out while showing an alarm (trip lock).
[3] Stop and
trip
Monitors for a short circuit or disconnection of
the brake resistor, or a short circuit of the brake
IGBT. If a fault occurs, the frequency converter
ramps down to coast and then trips. A trip lock
alarm is shown.
[4] AC brake Monitors for a short circuit or disconnection of
the brake resistor, or a short circuit of the brake
IGBT. If a fault occurs, the frequency converter
performs a controlled ramp down.
2-16 AC brake Max. Current
Range:
Function:
100.0 %
*
[0.0 -
1000.0 %]
NOTICE
Parameter 2-16 AC brake Max.
Current
is not effective when
parameter 1-10 Motor Construction
=
[1] PM, non-salient SPM
.
Enter the maximum allowed current
when using AC braking to avoid
overheating of motor windings.
2-17 Over-voltage Control
Option:
Function:
[0]
Disabled
No OVC required.
[2]
*
Enabled
Activates OVC.
2-19 Over-voltage Gain
Range:
Function:
100 %
*
[10 - 200 %]
Select overvoltage gain.
Parameter Description
Programming Guide
MG20OB02
Danfoss A/S © 05/2018 All rights reserved.
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Summary of Contents for VLT AQUA Drive FC 202
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