AP040092EN _DE1 Quick-Start-Guide
www.eaton.eu
Page 11
Motor protection
The internal motor protection protects the motor against overload. In default the
motor protection is set to the device’s rated current. It can be set to values between
10 and 100 % of the rated current by using the potentiometer “I motor” on the con-
figuration module. If a keypad or the PC software DrivesConnect is used, the motor
protection is set with P-08.
An overload is detected by the Variable Speed Starter and when the protection set-
ting is exceeded the DE1 trips with an over current message. In default the Variable
Speed Starter is configured in a way, that the thermal memory is activated and the content will be stored even
when the unit is switched off. This means that the value is still present when restarting the VSS and the
memory is not reset. If a reset of the thermal memory is required by the application it can be configured by P-
33.
Depending on the configuration of the input terminals the
function „external fault“ (EXTFLT) is assigned to terminal 3.
This Input can also be used to connect a thermistor. Wiring see
picture on the left hand side.
A fault is detected when the resistance is greater than 3600
Ohm. A reset of the fault is possible when the resistance is
below 1600 Ohm and the motor has cooled down.
Application hint: DE1 is built according IEC/EN 61800-5-1 where it is required to have a reinforced insulation
between mains circuits and low voltage circuits. For that reason, a reinforced insulation between the thermis-
tors and the motor windings is required not to weaken the overall insulation system of the PDS (Power Drive
System).