Lenze ECSDS Série Instructions De Montage page 87

Calculate release time and I
Calculate the release time and the I
in C0129/1 and C0129/2(evaluation coefficient "y").
Formulae for release time
T + * ( t )
100% * C0129 1
y +
Formulae for I
L(t) +
If the controller is inhibited, the I
EDKCSDX064 DE/EN/FR 3.0
2
x t load
z ) 1
ln 1 *
2
I Mot
y I N
n
) C0129 1
n
C0129 2
N
2
x t load
2
I
Mot
100%
y I
N
2
x t load is reduced:
t
*
L(t) + L
e t
Start
l
Safety instructions
Thermal motor monitoring
Self−ventilated motors
2
x t load of the motor considering the values
Information
T Release time of the I
monitoring
t
Thermal motor time constant
(C0128)
In Function: Natural logarithm
100
I Actual motor current (C0054)
Mot
I Rated motor current (C0088)
r
z Threshold value in C0120 (OC6) or
C0127 (OC8)
y Evaluation coefficient
n Rated speed (C0087)
rated
Information
L(t) Chronological sequence of the
2
I x t load of the motor
(Display: C0066)
y Evaluation coefficient
*t
1 * e
t
I Actual motor current (C0054)
Mot
Ir Rated motor current (C0088)
t
Thermal motor time constant
(C0128)
2
L I x t load before controller inhibit
Start
If an error is triggered, the value
corresponds to the threshold
value set in C0120 (OC6) or C0127
(OC8).
2
2
x t
87