Lenze ECS series User Manual

Safety instructions
Thermal motor monitoring
Self−ventilated motors
2

35
EDBCSXA064 EN 3.2
Calculate release time and I
2
x t load
Calculate the release time and the I
2
x t load of the motor considering the values in
C0129/1 and C0129/2(evaluation coefficient "y").
Formulae for release time Information
y +
100% * C0129ń1
C0129ń2
n
n
N
) C0129ń1
T +*(t) ln
ȧ
ȧ
ȡ
Ȣ
1 *
z ) 1
ǒ
I
Mot
y I
N
Ǔ
2
 100
ȧ
ȧ
ȣ
Ȥ
T Release time of the I
2
x t monitoring
t Thermal motor time constant (C0128)
In Function: Natural logarithm
I
Mot
Actual motor current (C0054)
I
r
Rated motor current (C0088)
z Threshold value in C0120 (OC6) or C0127 (OC8)
y Evaluation coefficient
n
rated
Rated speed (C0087)
Formulae for I
2
x t load Information
L(t) +
ǒ
I
Mot
y I
N
Ǔ
2
100%
ǒ
1 * e
*t
t
Ǔ
L(t) Chronological sequence of the I
2
x t load of the motor
(Display: C0066)
y Evaluation coefficient
I
Mot
Actual motor current (C0054)
Ir Rated motor current (C0088)
t Thermal motor time constant (C0128)
If the controller is inhibited, the I
2
x t load is reduced:
L(t) + L
Start
 e
*
t
t

Ǹ
L
Start
I
2
x t load before controller inhibit
If an error is triggered, the value corresponds to the
threshold value set in C0120 (OC6) or
C0127 (OC8).

Lenze ECS series Specifications

General

Brand	Lenze
Model	ECS series
Category	Control Unit
Language	English