NORDAC BASE (SK 180E / SK 190E) – Users Manual for Frequency Inverters
142
BU 0180 en-4118
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 can 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
P536
Current limit
(Current limit)
S
0.1 ... 2.0 / 2.1
(x nominal FI
current)
{ 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.
With the analogue input function in P400 = 13/14, this limit value can also be varied and cause an
error message (E12.4).
0.1 ... 2.0 =
Multiplier
with the inverter nominal current, gives the limit value.
2.1 =
OFF
means that this limit value is disabled. The FI supplies the maximum possible
current.
Summary of Contents for SK 180E Series
Page 1: ...BU 0180 en NORDAC BASE SK 180E SK 190E Users Manual for Frequency Inverters...
Page 4: ...NORDAC BASE SK 180E SK 190E Users Manual for Frequency Inverters 4 BU 0180 en 4118...
Page 185: ...8 Additional information BU 0180 en 4118 185 8 3 4 EU Declaration of Conformity...
Page 211: ...Key word index BU 0180 en 4118 211...
Page 212: ...6071802 4118...
