GE Ecomagination AF-600 FP Programming Manual page 197

Parameter Description
B-15 Brake Check
Option:
3 3
[0] Off
*
[1] Warning
[2] Trip
[3] Stop and
trip
[4] AC brake Monitors for a short circuit or disconnection of
196
Function:
NOTICE
Remove a warning arising in connection
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 located.
Select the type of test and monitoring function
to check the connection to the brake resistor, or
whether a brake resistor is present. Then 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 braking +1%, the
brake check fails. If brake check fails, a
warning or alarm is returned.
4. If the DC link ripple amplitude while
braking is higher than the DC link ripple
amplitude before braking +1%, the
brake check is OK.
Monitors brake resistor and brake IGBT for a
short circuit during operation. If a short circuit
occurs, a warning appears.
Monitors brake resistor and brake IGBT for a
short circuit, and runs a test for brake resistor
disconnection during power-up.
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).
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.
the brake resistor, or a short circuit of the brake
IGBT. If a fault occurs, the frequency converter
performs a controlled decel.
B-16 AC brake Max. Current
Range:
100 % [0 - 1000.0 %] Enter the maximum permissible current
*
NOTICE
Parameter B-16 AC brake Max. Current has no effect when
parameter P-20 Motor Construction=[1] PM, non salient
SPM.
B-17 Over-voltage Control
Overvoltage control (OVC) reduces the risk of the frequency
converter tripping due to an overvoltage on the DC link caused
by generative power from the load.
Option:
[0] Disabled No OVC required.
[2] Enabled Activates OVC.
*
03/2016 All rights reserved.
Function:
when using AC braking to avoid
overheating of motor windings.
Function:
NOTICE
The ramp time is automatically adjusted to
avoid tripping of the frequency converter.
DET-620D