GE Industrial Solutions AF-650 GP General Purpose Drive Programming Guide User Manual
Page 131
B-15 Brake Check
Option:
Function:
amplitude before braking + 1%: Brake
check has failed by returning a warning
or alarm.
4.
If the DC link ripple amplitude while
braking is higher than the DC link
ripple amplitude before braking + 1%:
Brake check is OK.
[0]
*
Off
Monitors brake resistor and brake IGBT for a
short-circuit during operation. If a short-circuit
occurs, warning 25 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 displaying an alarm (trip locked).
[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
decels to coast and then trips. A trip lock alarm
is displayed (e.g. warning 25, 27 or 28).
[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 decel.
[5]
Trip Lock
NOTE
Remove a warning arising in connection with [0] Off or [1]
Warning by cycling the mains supply. The fault must be
corrected first. For [0] Off or [1] Warning, the frequency
converter keeps running even if a fault is located.
This parameter is only active in frequency converters with
an integral dynamic brake.
B-16 AC brake Max. Current
Range:
Function:
100 %
*
[0 - 1000.0 %] Enter the maximum permissible current
when using AC brake to avoid
overheating of motor windings.
NOTE
B-16 AC brake Max. Current will not have effect when
P-20 Motor Construction = [1] PM, non salient SPM.
B-17 Over-voltage Control
Option:
Function:
Over-voltage control (OVC) reduces the risk
of the frequency converter tripping due to
an over voltage on the DC link caused by
generative power from the load.
[0]
*
Disabled
No OVC required.
[1]
Enabled (not
at stop)
Activates OVC except when using a stop
signal to stop the frequency converter.
[2]
Enabled
Activates OVC.
NOTE
OVC must not be enabled in hoisting applications.
B-18 Brake Check Condition
Range:
Function:
[0]
*
At Power Up
Brake check will be performed at
power up
[1]
After Coast Situations Brake check will be performed after
coast situations
Parameter Descriptions
AF-650 GP Programming Guide
130
DET-618C
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