43
During operational conditions where the motor must run at low speeds, it’s important to pay
attention to the motors’ capacity to dissipate heat. Most motors are designed to cool themselves at
60Hz 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
Inverter will continue running while displaying a blinking “OL1”. The blinking “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 Inverter Protection are as follows:
The Inverter will continue to run when the current is under 110%. If the inverter continues
above 110%, the Inverter will time out proportionally to 150% at 60 seconds.
In (
Fn_71
), if the setting is (xxx0) after the Electronic Thermal Inverter Protection is energized, the
Inverter Base Block immediately shuts down the drive and a “OL2” is displayed on the Keypad.
To Restart the Inverter, it is necessary to press the RESET Key
In (
Fn_71
), if the setting is (xxx1) after the Electronic Thermal Inverter Protection is energized, the
Inverter will continue to run and display a blinking “OL2” until the current is lower than 110% of the
rating.
Setup & Derating
%
%
%
100
50 Hz
Hz
Hz
6
20 50
20 60
(
Fn_69
) is (xx1x)
(
Fn_69
) is (xx0x)
(
Fn_69
) is (xx0x)
(
Fn_05
) is (0-8)
(
Fn_05
) is (9-17)
Special Motor
50Hz Standard Motor
60Hz Standard Motor
100
60
The motor’s ability to cool itself is dependent of its
on board fan. Low speeds and high currents can
reduce the life of the motor. Use the Inverter’s
thermal protections and setup features to help with
these types of situations.
100
90
60
100
60
