nord NORDAC PRO SK 511E Series - Page 153

5 Parameters
BU 0505 EN-3021 153
P555
Chopper P limitation
(Chopper power limitation)
S
5 ... 100 %
{ 100 }
With this parameter it is possible to program a manual (peak) power limit
for the brake resistor.
The switch-
on delay (modulation level) for the chopper can only rise to a certain maximum
specified limit. Once this value has been reached, irrespective of the level of the link voltage, the
inverter switches off the current to the resistor.
The result would be an overvoltage switch-off of the FI.
The correct percentage value is calculated as follows:
%100*
*
[%]
2
max
max
U
PR
k
BW
=
R = Resistance of the brake resistor
P
maxBW
= Momentary peak power of the brake resistor
U
max
= FI chopper switching threshold
1~ 115/230 V
⇒ 440 V=
3~ 230 V
⇒ 500 V=
3~ 400 V
⇒ 1000 V=
Pos: 370 /Anleitungen/ Elektronik/F U und Starter/5. Parameter/ Parameterauflis tung (P000 ...)/P500- P599/Parameter P556 – Br emswiderstand @ 0\mod_1328098 726859_388.docx @ 1214 6 @ @ 1
P556
Braking resistor
(Brake resistor)
S
1 ... 400 Ω
{ 120 }
Value of the brake resistance for the calculation of the maximum brake power to protect the
resistor.
Once the maximum continuous output (P557) including overload (200% for 60s) is reached, an I
2
t
limit error (E003.1) is triggered. Further details in P737.
Pos: 371 /Anleitungen/ Elektronik/F U und Starter/5. Parameter/ Parameterauflis tung (P000 ...)/P500- P599/Parameter P557 – Leist ung Bremswidersta nd @ 0\mod_1328098773656_ 388.docx @ 12169 @ @ 1
P557
Brake resistor type
(Brake resistor power)
S
0.00 ... 320.00 kW
{ 0.00 }
Continuous power (nominal power) of the resistor, to
display the actual utilisation in P737. For a
correctly calculated value, the correct value must be entered into P556 and P557.
0.00 = Monitoring disabled
Pos: 372 /Anleitungen/ Elektronik/F U und Starter/5. Parameter/ Parameterauflis tung (P000 ...)/P500-P599/Parameter P558 – Magnetisier ungszeit @ 0\mod_13280988 14188_388.doc x @ 12192 @ @ 1
P558
Flux delay
(Magnetizing time)
S P
0 / 1 / 2 ... 500 ms
{ 1 }
The ISD control can only function correctly if there is a
magnetic field in the motor. For this
reason, a DC current is applied before starting the motor. The duration depends on the size of the
motor and is automatically set in the factory setting of the FI.
For time-critical applications, the magnetizing time can be set or deactivated.
0 = Switched off
1 = Automatic calculation
2 ... 500 = Time set in [ms]
NOTE: Setting values that are too low can reduce the dynamics and starting torque.
Pos: 373 /Anleitungen/ Elektronik/F U und Starter/5. Parameter/ Parameterauflis tung (P000 ...)/P500- P599/Parameter P559 – DC-Nach laufzeit @ 0\mod_1328098 856657_388.doc x @ 12215 @ @ 1
P559
DC Run-on time
(DC Run-on time)
S P
0.00 ... 30.00 s
{ 0.50 }
Following a stop signal
and the braking ramp, a direct current is briefly applied to the motor to
fully bring the drive to a stop. Depending on the inertia, the time for which the current is applied
can be set in this parameter.
The current level depends on the previous braking p
rocedure (current vector control) or the static
boost (linear characteristic).
Pos: 374 /Anleitungen/ Elektronik/F U und Starter/5. Parameter/ Parameterauflis tung (P000 ...)/P500- P599/Parameter P560 – Par ameter Speichermode @ 0\mod_13 28098918376_388.d ocx @ 12238 @ @ 1