Danfoss VLT AutomationDrive FC 301 User Manual

1-04 Overload Mode
Option: Function:
[0] * High torque Allows up to 160% over torque.
[1] Normal torque For oversized motor - allows up to 110% over torque.
This parameter cannot be adjusted while the motor is running.
1-90 Motor Thermal Protection
Option: Function:
The frequency converter determines the motor temperature for motor protection in three different
ways:
• Via a thermistor sensor connected to one of the analog or digital inputs (par. 1-93
Ther-
mistor Source
). See section PTC Thermistor Connection .
• Via a KTY sensor connected to an analog input (par. 1-96
KTY Thermistor Resource ). See
section
KTY Sensor Connection .
• Via calculation (ETR = Electronic Terminal Relay) of the thermal load, based on the actual
load and time. The calculated thermal load is compared with the rated motor current
I
M,N
and the rated motor frequency f
M,N
. The calculations estimate the need for a lower
load at lower speed due to less cooling from the fan incorporated in the motor.
[0] * No protection Continuously overloaded motor, when no warning or trip of the frequency converter is required.
[1] Thermistor warning Activates a warning when the connected thermistor or KTY-sensor in the motor reacts in the event
of motor over-temperature.
[2] Thermistor trip Stops (trips) frequency converter when connected thermistor or KTY sensor in the motor reacts in
the event of motor over-temperature.
The thermistor cut-out value must be > 3 k.
Integrate a thermistor (PTC sensor) in the motor for winding protection.
[3] ETR warning 1 Please see detailed description below
[4] ETR trip 1
[5] ETR warning 2
[6] ETR trip 2
[7] ETR warning 3
[8] ETR trip 3
[9] ETR warning 4
[10] ETR trip 4
Select
ETR Warning 1-4 , to activate a warning on the display when the motor is overloaded.
Select
ETR Trip 1-4 to trip the frequency converter when the motor is overloaded.
Programme a warning signal via one of the digital outputs. The signal appears in the event of a warning and if the frequency converter trips (thermal
warning).
ETR (Electronic Terminal Relay) functions 1-4 will calculate the load when the set-up where they were selected is active. For example ETR starts calculating
when set-up 3 is selected. For the North American market: The ETR functions provide class 20 motor overload protection in accordance with NEC.
4 How to Programme
VLT
®
AutomationDrive FC 300 Operating
Instructions
50 MG.33.AG.02 - VLT
®
is a registered Danfoss trademark
4

Danfoss VLT AutomationDrive FC 301 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 301
Category	DC Drives
Language	English