Lenze 9300 vector Série Instructions De Montage page 130

2 Safety instructions
Thermal motor monitoring
Self−ventilated motors
Calculate release time and I
Calculate the release time and the I
C0129/1 and C0129/2(evaluation coefficient "y").
Formulae for release time
T + * ( t )
100% * C0129 1
y +
C0129 2
Formulae for I
L(t) +
y
If the controller is inhibited, the I
L(t) + L
130
2
x t load
z ) 1
ln 1 *
2
I Mot
100
y I N
n
) C0129 1
n
N
2
x t load
2
*t
I
Mot 1 * e
100% t
I
N
2
x t load is reduced:
t
*
t
e
Start
l
2
x t load of the motor considering the values in
Information
T Release time of the I
t
Thermal motor time constant (C0128)
In Function: Natural logarithm
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 I
(Display: C0066)
y Evaluation coefficient
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
x t monitoring
2
x t load of the motor
EDKVF9333V DE/EN/FR 7.2