7.2
Motor connection for the sizes SAN/SARN 25.1
For the size SA/SAR 25.1, the power for the motor is connected to separate
terminals. For this, the cover at the motor connection compartment has to
be removed.
The control contacts are connected to the AUMA plug/socket connector.
Cross section motor terminals: max. 16 mm²
7.3
Delay time
The delay time is the time from the tripping of the limit or torque switches to
the motor power being removed. To protect the valve and the actuator, we
recommend a delay time < 50 ms. Longer delay times are possible provided
the output speed, output drive type, valve type, and the type of installation
are considered.
We recommend to switch off the corresponding contactor directly by the limit
or torque switch.
7.4
Motor protection
In order to protect against overheating and impermissibly high 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.
Failure to integrate thermoswitches into the control circuit voids the warranty
for the motor.
7.5
Remote position transmitter
For the connection of remote position transmitters (potentiometer, RWG),
screened cables must be used.
12
Multi-turn actuators SAN 07.1 – SAN 25.1/SARN 07.1 – SARN 25.1
for valve automation in nuclear power plants
Operation instructions
Figure G-3: Connection to SAN/SARN 25.1
Cover motor connection compartment
AUMA plug/socket connector