What is the role the motor outputs and the T1 and T2 outputs?

Discussion in 'Electronics Resources' started by Wael92, Jul 11, 2016.

  1. Wael92

    Thread Starter New Member

    Jul 6, 2016
    I've attached one file with three PDFs,
    As far as I know, they are electrical schematics representing the control and monitoring for a MF3000 series submersible pump.
    They use a TeSys T LTMR controller with the expansion module and a minicas 2.

    The page with the first pdf are the new mods that I need to implement. Im not entirely sure on the functionality on the system, espesically in regards to the minicas section and the terminals 1-4 and 7 and 5.

    Ive also attached the data sheet for the minicas if it helps.

    Any informations in regards to how the minicas functions with the pump and the t1 and t2 terminals would be a great help.
  2. Marley


    Apr 4, 2016
    Some motors have a built-in temperature sensor (thermistor) embedded in the windings. In fact your first diagram shows this sensor connected at t1 and t2.
  3. KeepItSimpleStupid

    Distinguished Member

    Mar 4, 2014
    Well, maybe not a thermister, but a temperature sensitive switch. These would go in series with the starter contactor relay coil so it would drop out when the temp got too high.

    PTC thermisters are used as well, particularly for low voltage DC motors.

    EDIT: In Bold
    Last edited: Jul 20, 2016
  4. Wael92

    Thread Starter New Member

    Jul 6, 2016
    Cheers for the replies guys!
  5. JohnBS

    New Member

    Sep 20, 2015
    I'm wondering if the mincas relay is an earlier model than shown in your data-sheet? i.e. is DC06 really +24v? Do your mods really impact on the monitoring circuit (we have no data on the Schneider boxes).