Lenze EVF9333−xV - Manual (Page 453)

Troubleshooting and fault elimination
Fault elimination
Behaviour in case of overvoltage in the DC bus (OU message)
9
9.4
9.4.3
l
9.4−3 EDSVF9333V EN 6.2−04/2012
9.4.3 Behaviour in case of overvoltage in the DC bus (OU message)
If the DC−bus voltage (U
DC
) exceeds the switch−off threshold OU, the pulse
inhibit is set. At the same time, an internal timing element starts for a delay
time (C0912).
The pulse inhibit is deactivated if the voltage falls below the switch−on
threshold OU and the delay time has elapsed.
Switching thresholds in case of overvoltage in the DC bus (OU):
Mains voltage range C0173 Switch−off threshold
OU
Switch−on threshold
OU
< 400 V Operation with /
without brake
chopper 0 770 V 755 V
400 V Operation with /
without brake
chopper 1 * 770 V 755 V
460 V Operation with /
without brake
chopper 2 770 V 755 V
480 V Operation without
brake chopper 3 770 V 755 V
480 V Operation with brake
chopper 4 800 V 785 V
* Lenze setting
Codes for parameter setting
Code Possible settings IMPORTANT
No. Name Lenze Selection
C0912 OV delay time à − {1 ms} − Delay time of the pulse enable
after an OU message
à Depending on C0082, C0086,
C0087, C0088, C0089, C0090,
C0091, C0092
A change of one of the codes
resets C0912 to the time of the
selected motor
l The time is derived from the
double rotor time constant
^
8.2−25
^
8.2−48
^
9.4−3
Description