Siemens SIMOCODE pro - Overload Protection; Description of Overload Protection Functions; Set Current Is1

Parameters
4.1 Motor protection
SIMOCODE pro - Parameterize
34 Operating Manual, 04/2017, A5E40507630002A/RS-AA/001
4.1.2
Overload protection
4.1.2.1
Description of overload protection functions
SIMOCODE pro protects three-phase or AC motors in accordance with IEC 60947-4-1
requirements. The trip class can be set to eight different settings, ranging from Class 5 to
Class 40. Thus, the tripping time can be adapted precisely to the power-up behavior of the
motor, improving utilization of the motor capacity. Additionally, the "Thermal motor model"
and time to overload trip are calculated and made available to the control system. After an
overload trip, the remaining cooling down period is displayed (see Class). The motor current
is saved in the case of an overload trip.
Depending on the control function, the set current I
s
is separately parameterizable for one or
two speeds (I
s
1 and I
s
2).
The rated motor current is usually set with
set current I
s
1
. This value can be found on the
type plate of the motor. It is the basis for calculating the overload trip characteristic curve.
The
Set current I
s
2
is only necessary for motors with 2 speeds so that adequate overload
protection for the higher speed is also ensured. Generally, I
s
2 should be set higher than I
s
1.
4.1.2.2
Set current Is1
Setting ranges for current setting l
s
1
Range: Depends on the selected current measuring module or current / voltage measuring
module.
Current setting I
s
1 when using a current measuring module or a 1st generation current /
voltage measuring:
● 0.3 to 3 A (default: 0.3)
● 2.4 to 25 A
● 10 to 100 A
● 20 to 200 A
● 63 to 630 A
Current setting I
s
1 when using a 2nd generation current / voltage measuring module:
● 0.3 to 4 A (default: 0.3)
● 3 to 40 A
● 10 to 115 A
● 20 to 200 A
● 63 to 630 A