Description
TF42-20 Thermal Overload Relay
The TF42-20 thermal overload relay is an economic electromechanical protection device for the main circuit. It offers reliable and fast protection for motors in the event of overload or phase failure. The device has trip class 10. Further features include temperature compensation, trip contact (NC), signal contact (NO), automatic or manual reset selectable, trip-free mechanism, STOP function and trip indication. It connects directly to block contactors. Single mounting kits are available as accessory.
Technical Data:
Setting Range: 16 … 20 A
Rated Operational Voltage: Auxiliary Circuit 600 V AC/DC, Main Circuit 690 V AC, Main Circuit 600 V DC
Rated Operational Current: 20 A
Rated Frequency: Auxiliary Circuit 50 Hz / 60 Hz / DC, Main Circuit 50 Hz / 60 Hz
Rated Insulation Voltage: 690 V
Number of Poles: 3
Auxiliary Contacts NC: 1, NO: 1
Protected Poles: 3
Degree of Protection: IP20
Pollution Degree: 3
Power Loss per Pole: 1.8 … 2.6 W
Trip Class: 10
Dimensions:
Width: 4.5 cm
Height: 8.83 cm
Depth / Length: 7.05 cm
Weight: 0.135 kg
Operating Conditions:
Ambient Temperature Operation: -25 … +60 °C
Ambient Temperature Storage: -50 … +80 °C
Max Operating Altitude: 2000 m
Standards: IEC/EN 60947-1, IEC/EN 60947-4-1, IEC/EN 60947-5-1, UL 60947-1, UL 60947-4-1, IEC 60335-2-40 A2L
Customs Tariff Code: 85364900
