11.2.2. Motor protection (thermal monitoring)
In order to protect against overheating and impermissibly high surface temperatures
at the actuator, thermoswitches are embedded in the motor winding.The thermoswitch
is tripped as soon as the max. permissible winding temperature has been reached.
The actuator is stopped and the red indication light (option) on the local controls is
illuminated.
The motor has to cool down before operation can be resumed.
Version with thermoswitch (standard)
The actuator can be controlled again once the motor has cooled down (red indication
light goes out).
Version with thermoswitch and additional thermal overload relay within the
controls (option):
The operation may only be resumed once the fault signal (red indication light) has
been reset.The fault signal is reset via the overload relay integrated in the actuator
controls.Therefore the controls have to be opened at the cover and the relay held
down.The relay is located on the contactors.
47
SQ 05.2 – SQ 14.2/SQR 05.2 – SQR 14.2
AMB 01.1 Corrective action
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