NORD Drivesystems BU0505 - Manual (Page 129)

5 Parameters
BU 0505 GB-1013 129
P537
Pulse disconnection
(Pulse disconnection)
S
10 ... 200 % / 201
{ 150 }
This function prevents rapid shutdown of the FI according to the load. With the pulse switch-off
enabled, the output current is limited to the set value. This limitation is implemented by brief
switching off of individual output stage transistors, the actual output frequency remains
unchanged.
10...200% = Limit value related to the nominal FI current
201 = The function is so to speak disabled, the FI supplies the maximum possible current.
However, in spite of this the pulse switch-off (SW 2.0 or above) can become active at the
current limit.
NOTE: The value set here can be undershot by a smaller value in P536.
For smaller output frequencies (<4.5Hz) or higher pulse frequencies (>6kHz or
8kHz, P504) the pulse switch-off by the power reduction (see Section 8.5) can be
undershot.
NOTE: If the pulse switch-off is disabled (P537=201) and a high pulse frequency is selected
in parameter P504, the FI automatically reduces the pulse frequency when the
power limit is reached. If the load on the FI is again reduced, the pulse frequency
increases to the original value again.
Pos : 294 /Anleit ungen/5. / 6. Parametrier ung [BU 0500 / BU 0200]/ Par ameter/ P500-P599/ Paramet er P538 – N et zspannungsüber wachung @ 0\ mod_1328093765682_388. doc x @ 11686 @ @ 1
P538
Check input voltage
(Mains voltage monitoring)
S
0 ... 4
{ 3 }
For reliable operation of the inverter the power supply must meet a certain quality. If there is a
brief interruption of a phase or the voltage supply sinks below a particular limit value, the inverter
will output an error.
Under certain operating conditions, it may be necessary to suppress this error message. In this
case, the input monitoring can be modified.
0 = Switched off: No monitoring of the supply voltage.
1 = Phase error: an error message is only produced by phase errors.
2 = Mains voltage: an error message is only produced by a low voltage.
3 = Phase err. + mains voltage: A phase error or undervoltage produce an error message.
4 = DC supply: The input voltage is fixed at 480V for the direct supply of direct current.
Phase error and low mains voltage monitoring are deactivated.
NOTE: Operation with an impermissible mains voltage can destroy the frequency inverter!
With 1/3~230V or 1~115V devices, the phase error monitoring does not function!
Pos : 295 /Anleit ungen/5. / 6. Parametrier ung [BU 0500 / BU 0200]/ Par ameter/ P500-P599/ Paramet er P539 – Ausgangsüber wac hung @ 0\ mod_1328093804307_388.doc x @ 11709 @ @ 1
P539
Output monitoring
(Output monitoring)
S P
0 ... 3
{ 0 }
This protective function monitors the output current at the U-V-W terminals and checks for
plausibility. In cases of error, the error message E016 is output.
0 = Disabled: Monitoring is not active.
1 = Only motor phases: The output current is measured and checked for symmetry. If an
imbalance is present, the FI switches off and outputs the error message E016.
2 = Only magnetisation: At the moment the FI is switched on, the level of the excitation
current (field current) is checked. If insufficient excitation current is present, the FI switches
off with the error message E016. A motor brake is not released in this phase.
3 = Motor phase + Magnet: Monitoring of the motor phases and magnetisation as in 1 and 2
are combined.
NOTE: This function can be used as an additional protective function for lifting applications,
but is not permissible on its own as protection for persons.
Pos : 296 /Anleit ungen/5. / 6. Parametrier ung [BU 0500 / BU 0200]/ Par ameter/ P500-P599/ Paramet er P540 – M odus Drehrichtung @ 0\ mod_1328093845510_388. doc x @ 11732 @ @ 1