NORD Drivesystems BU0200 - Manual (Page 221)

SK 200E Manual for frequency inverters
220 Subject to technical alterations BU 0200 GB-4411
Parameter
{Factory setting}
Setting value / Description / Note Device Supervisor
Parameter
set
P533
Factor I
2
t Motor
(Factor I
2
t-Motor)
S
50 ... 150 %
{ 100 }
The motor current for the I
2
t motor monitoring P535 can be weighted with the parameter P533.
Larger factors permit larger currents.
P534 [-01]
[-02]
Torque disconn. limit
(Torque disconnection limit)
S P
25 ... 400 % / 401
{ all 401 }
Via this parameter both the drive [-01] and the generator switch-off value [-02] can be
adjusted.
If 80% of the set value is reached, a warning status is set. At 100% switch-off is performed with
an error message.
Error 12.1 is given on exceeding the motor switch-off limit and E12.2 on exceeding the
generator switch-off limit.
[-01] = motor switch-off limit
[-02] = generator switch-off limit
401 = OFF, means that this function has been disabled.
P535
I
2
t motor
(I
2
t motor)
0 … 24
{ 0 }
The I
2
t motor function can now be set in a differentiated manner. Up to four curves with three
different triggering times can be set. The trigger times are based on classes 5, 10 and 20 for
semiconductor switching devices.
All curves run from 0Hz to half of the nominal motor frequency (P201). The full nominal current
is available from half of the nominal frequency upwards.
0 = I
2
t Motor Off: Monitoring is inactive
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
NOTE: For switch-off classes 10 and 20, care must be taken that the FI has a sufficiently
high overload capacity.