Description
TF96-78 Thermal Overload Relay
The TF96-78 thermal overload relay is an economic electromechanical protection device for the main circuit. It offers reliable and fast protection for motors in case of overload or phase failure. The device features trip class 10, temperature compensation, trip contact (NC), signal contact (NO), automatic or manual reset selectable, trip-free mechanism, STOP function, and a trip indication. The overload relays connect directly to block contactors. Single mounting kits are available as accessory.
Setting Range: 65 … 78 A
Rated Operational Voltage: Auxiliary Circuit 600 V AC/DC; Main Circuit 690 V AC; Main Circuit 440 V DC
Rated Operational Current (Ie): 78 A
Rated Frequency: Auxiliary Circuit 50 Hz, 60 Hz, DC; Main Circuit 50 Hz, 60 Hz
Rated Impulse Withstand Voltage (Uimp): Auxiliary Circuit 6000 V; Main Circuit 8000 V
Rated Insulation Voltage (Ui): 690 V
Number of Poles: 3
Number of Auxiliary Contacts NC: 1
Number of Auxiliary Contacts NO: 1
Number of Protected Poles: 3
Conventional Free-air Thermal Current (Ith): Auxiliary Circuit NC 6 A; Auxiliary Circuit NO 4 A
Rated Operational Current AC-15 (Ie): (120 V) NC 3 A, NO 0.5 A; (240 V) NC 3 A, NO 0.5 A; (400 V) NC 0.75 A, NO 0.5 A; (500 V) NC 0.75 A, NO 0.5 A
Rated Operational Current DC-13 (Ie): (125 V) NC 0.55 A, NO 0.55 A; (24 V) NC 1.25 A, NO 1.25 A; (250 V) NC 0.27 A, NO 0.27 A; (500 V) NC 0.15 A, NO 0.15 A; (60 V) NC 0.55 A, NO 0.55 A
Degree of Protection: Housing IP20; Main Circuit Terminals IP10
Pollution Degree: 3
Connecting Capacity Auxiliary Circuit: Flexible with Ferrule 1/2x 0.75 … 2.5 mm²; Flexible with Insulated Ferrule 1x 0.75 … 2.5 mm²; Flexible with Insulated Ferrule 2x 0.75 … 1.5 mm²; Flexible 1/2x 0.75 … 1 mm²; Flexible 1/2x 1 … 2.5 mm²; Rigid 1/2x 0.75 … 4 mm²
Connecting Capacity Main Circuit: Flexible with Ferrule 1/2x 6 … 35 mm²; Flexible with Ferrule 1x 6 … 50 mm²; Flexible with Insulated Ferrule 1/2x 6 … 16 mm²; Flexible with Insulated Ferrule 1x 6 … 50 mm²; Flexible 1/2x 6 … 35 mm²; Flexible 1x 6 … 50 mm²; Rigid 1/2x 6 … 35 mm²; Rigid 1x 6 … 50 mm²
Tightening Torque: Auxiliary Circuit 1 … 1.2 N·m; Main Circuit 6.0 … 9.0 N·m
Wire Stripping Length: Auxiliary Circuit 0.9 cm; Main Circuit 2.0 cm
Recommended Screw Driver: Auxiliary Circuit Pozidriv 2; Main Circuit Hexagon 4
Mounting Position: 1 … 6
Power Loss: at Rated Operating Conditions per Pole 2.7 … 3.8 W
Suitable For: AF80, AF96
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
Maximum Operating Voltage UL/CSA: Main Circuit 600 V AC
Contact Rating UL/CSA: (NC:) B600, Q600; (NO:) Q600, D300
Connecting Capacity Main Circuit UL/CSA: Flexible 1x 8-1 AWG; Flexible 2x 8-3 AWG; Stranded 1x 8-1 AWG; Stranded 2x 8-3 AWG
Connecting Capacity Auxiliary Circuit UL/CSA: Flexible 1/2x 18-12 AWG; Stranded 1/2x 18-12 AWG
Tightening Torque UL/CSA: Auxiliary Circuit 9 … 11 in·lb; Main Circuit 53 … 80 in·lb
Ambient Air Temperature Operation: -40 … +70 °C
Ambient Air Temperature Operation Compensated: -40 … +70 °C
Ambient Air Temperature Storage: -50 … +80 °C
Ambient Air Temperature Compensation: Yes
Maximum Operating Altitude Permissible: 2000 m
Resistance to Shock acc. to IEC 60068-2-27: 11 ms Pulse 25g
Resistance to Vibrations: 5g 3 … 150 Hz
