Lenze E84AVHC Series - Page 200

8400 HighLine | Parameter setting & configuration
Motor control (MCTRL)
Monitoring
200 L Firmware ≤ 05.00 - DMS 4.2 EN - 02/2010
[5-30] Tripping characteristic of the I
2
xt monitoring
Example:
C00120 = I
r
/I
N
x 100 %
C00054
= 150 % rated motor current
 After approx. 60 seconds, C00066
has reached the final value (100 %) at output
frequencies f > 40 Hz.
 The controller outputs the "OC6: I2xt overload motor
" error message and triggers the
response set in C00606
(default setting: "Warning").
 Tip!
• If forced ventilated motors are used, a premature response of the overload
threshold can be avoided by deactivating this function if necessary
(C00606
= "0: No response").
• The current limits set in C00022
and C00023 influence the I
2
xt calculation only
in an indirect way. However, the operation of the motor at maximum possible
load can be averted. Defining current and speed limits
( 109)
f: Output frequency
t: Release time
I
N
: Rated current of drive controller at a switching frequency of f = 8 kHz
I
r
: Rated motor current (see nameplate of motor)
C00054
: Apparent motor current
C00120
: Motor overload threshold
60
180
240
300
360
t [s]
0.5
0
0
1.0
1.5 2.0
C00054
I
r
120
f =0Hz
f =20Hz
f >40Hz
I x 100 %
I
r
N
C00120 <
I x 100 %
I
r
N
C00120 =
I x 100 %
I
r
N
C00120 >
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