nord NORDAC PRO SK 511E Series - Page 145

5 Parameters
BU 0505 EN-3021 145
P535
I
2
t Motor
(I
2
t Motor)
0 … 24
{ 0 }
The motor temperature is calculated depending on the output current, the time and the output
frequency (cooling). If the temperature limit value is reached then switch off occurs and error
message E002 (motor overheating) is output. Possible positive or negative acting ambient
conditions cannot be taken into account here.
The I
2
t motor function ca
n be set in a differentiated manner. 8 characteristic curves with three
different triggering times (<5 s, <10 s and <20
s) can be set. The trigger times are based on
classes 5, 10 and 20 for semiconductor switching devices. The recommended setting for standard
applications is P535=5.
All curves run from 0
Hz to half of the nominal motor frequency (P201). The full nominal current is
available from half of the nominal frequency upwards.
With multi-motor operation the monitoring must be disabled.
0 = I
2
t Motor off: Monitoring is inactive
NOTE: Shut-
off classes 10 and 20 are provided for applications with heavy starting. When
using these shut-off classes, it must be ensured that the FI has a
sufficiently high
overload capacity.
Switch-off class 5,
60s at 1.5x I
N
Switch-off class 10,
120s at 1.5x I
N
Switch-off class 20,
240s at 1.5x I
N
I
N
at 0Hz P535 I
N
at 0Hz P535 I
N
at 0Hz P535
100% 1 100% 9 100% 17
90% 2 90% 10 90% 18
80% 3 80% 11 80% 19
70% 4 70% 12 70% 20
60% 5
60% 13 60% 21
50% 6 50% 14 50% 22
40% 7 40% 15 40% 23
30% 8 30% 16 30% 24
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0 ... 1
{ 0 }
Up to and including software version 1.5 R1, the following applies:
0 = Switched off
1 = Switched on (equivalent to setting 5 (see above))
Pos: 343 /Anleitungen/ Elektronik/F U und Starter/5. Parameter/ Parameterauflis tung (P000 ...)/P500- P599/Parameter P536 – Stro mgrenze @ 0\mod_132809366451 0_388.docx @ 11640 @ @ 1
P536
Current limit
(Current limit)
S
0.1 ... 2.0 / 2.1
(x nominal current of
FI)
{ 1.5 }
The inverter output current is limited to the set value. If this limit
value is reached, the inverter
reduces the actual output frequency.
Multiplier with the inverter nominal current, gives the limit value
2.1 = OFF represents the disabling of this limit value.
Pos: 344 /Anleitungen/ Elektronik/F U und Starter/5. Parameter/ Parameterauflis tung (P000 ...)/P500- P599/Parameter P537 – Pul sabschaltung @ 0\mod_1328 093709635_388.doc x @ 11663 @ @ 1