51
Note:
During operational conditions where the motor must run at low speeds, its important to pay
attention to the motors capacity to dissipate heat, since most motors are designed to cool them
selves at 60 Hz and full voltage, proper setup of the thermal functions should be observed.
When the electronic thermal motor protection is on in (Fn_69) during an overload condition, the
T-verter will continue running and while displaying “OL1” the blinking of the OL1 will continue
until the running current is lower than 103% or 113% (depending on the setting in (Fn_69).
The functions of the electronic thermal T-verter protection are as follows.
The T-verter will continue to run when the current is under 110%; if the T-verter continues above
110% the T-verter will time out proportionally to 150% at one minute.
In (Fn_71) if the setting is (xxx0) after the electronic thermal T-verter protection is energized, the
T-verter Base Block immediately shuts down the drive and starts to display “OL2”.
To re-start the T-verter, it is necessary to press the RESET key
In (Fn_71) if the setting is (xxx1) after the electronic thermal T-verter protection is energized, the
T-verter will continue to run and display a blinking “OL2” until the current is lower than 110% of
the rating.
Setup & D-Rating
% % %
100
0
50 Hz 60 Hz Hz
6 20 50 20 60
FIG. 1 FIG. 2 FIG. 3
(Fn_69) is (xx1x)
(Fn_69) is (xx0x)
(Fn_69) is (xx0x)
(Fn_05) is (0-8)
(Fn_05) is (9-17)
Special Motor
50 Hz Standard Motor 60 Hz Standard Motor
100
60
The motors ability to cool itself is dependent on its on
board fan. Low speeds and high currents can reduce
the life of the motor. Use the T-verters thermal
protections and setup features to help with these types
of situations.
100
90
60
100
90
60
