Mounting and options
3.3 Thermal motor protection
S-1FK7 DYA G2 synchronous motors with planetary gearbox
Operating Instructions, 05/2018, A5E44881183B AA
37
1FK703 to 1FK704: up to 2
∙
I
0 (60 K)
and speed ≠ 0
1FK706: up to 4
∙
I
0 (60 K)
and speed ≠ 0
NOTICE
Destruction of the motor for a thermally critical load
For load applications that are critical from a thermal perspective, e.g. overload when the
motor is stationary or an overload of M
max
longer than 4 s, adequate protection is no longer
available.
•
Activate the "Thermal motor model i
2
t monitoring" function in the converter.
The temperature sensor is part of a SELV circuit, which can be destroyed if high voltage is
applied. The temperature sensor is designed so that the DIN/EN requirement for "protective
separation" is complied with.
High short-term overload conditions require additional protective measures as a result of the
thermal coupling time of the temperature sensor.
NOTICE
Destruction of the motor for a thermal critical load
A thermally critical load, e.g. high overload when the motor is stationary, can destroy the
motor.
•
Employ additional protective measures, e.g. an overcurrent relay.