6
Electrical installation
Installation instructions
Operating Instructions – Explosion-Protected MOVI-SWITCH
®
Drives
30
Gasket selection
If the motor is operated in environments with high environmental impact, such as in-
creased ozone values, the motors can be optionally equipped with gaskets of a higher
quality. If you have doubts regarding the stability of the gaskets when subjected to the
respective environmental impacts, contact SEW‑EURODRIVE.
6.2.14
Protection concept
•
MOVI-SWITCH
®
drives in category 3D are equipped with temperature sensors
(TF) at the factory. When the motor winding reaches the permitted maximum tem-
peratures, the MOVI-SWITCH
®
motor starter sets the "OK" output signal to "0".
•
The "OK" output signal must be monitored by an independent evaluation unit.
•
When the MOVI-SWITCH
®
motor starter sets the "OK" output signal to "0", the
drive must be disconnected from the supply system.
•
The TF automatically switches itself back on when the temperature drops below
the maximum value. A restart lockout must prevent the drive from starting again.
•
Please note: Do not switch the drive back on until the cause of the problem has
been checked. This check must be performed by a trained specialist.
25988670/EN – 04/2020
