TF140DU thermal overload relays 66 142 A Description The TF140DU thermal overload relays are economic electromechanical protection devices for the main circuit. They offer reliable protection for motors in the event of overload or phase failure. The devices have trip class 10A. The thermal overload relays are three pole relays with bimetal tripping elements. The motor current flows through the bimetal tripping elements and heats them directly and indirectly. In case of an overload (over current), the bimetal elements bent as a result of the heating. This leads to a release of the relay and a change of the contacts switching position (95-96 / 97-98). Manual or automatic reset selectable TF140DU-110 Phase loss sensitive acc. to IEC/EN 60947-4-1 Two electrically isolated auxiliary contacts 1 N.O. + 1 N.C. TEST and STOP function Trip indication on the front Temperature compensation Suitable for three- and single-phase applications Ordering details Setting range Short-circuit Trip class Type Order code Weight protective device (1 pce) A kg 66 ... 90 200 A, Fuse type gG 10A TF140DU-90 1SAZ431201R1001 0.820 80 ... 110 224 A, Fuse type gG 10A TF140DU-110 1SAZ431201R1002 0.820 100 ... 135 224 A, Fuse type gG 10A TF140DU-135 1SAZ431201R1003 0.820 110 ... 142 250 A, Fuse type gG 10A TF140DU-142 1SAZ431201R1004 0.820 Main dimensions mm, inches 89 3.5 29.75 1.17 29.75 1.17 19.9 0.78 37 1.46 6.4 3.5 4 0.16 5.5 0.22 13.45 0.53 98 97 96 95 2/T1 4/T2 6/T3 25 0.98 25 0.98 8 0.31 6 0.24 5.3 0.21 58.8 2.31 50 1.97 126 4.96 68 2.68 80 3.15 84.2 3.31 TF140DU C2 ABB 2CDC231012V0012 73.8 2.91 140 5.51 51 2.01 67.3 2.65 82.3 3.24 2CDC232008F0012 2CDC106054C0201a t = 0.5 s t = 1 a s t = 1.5 s a t = 3 a s t = 5 s a TF140DU thermal overload relays Technical data Main circuit Utilization characteristics according to IEC/EN Type TF140DU Standards IEC/EN 60947-1, IEC/EN 60947-4-1, IEC/EN 60947-5-1 Rated operational voltage U 690 V AC e Rated frequency DC, 50/60 Hz Frequency range 0 ... 400 Hz Trip class 10A Number of poles 3 Duty time 100 % Operating frequency without early tripping Up to 15 operations/h, seeTechnical diagram Intermittent periodic dut Rated impulse withstand voltage U 8 kV imp Rated insulation voltage U 690 V i Auxiliary circuit according to IEC/EN Type TF140DU Rated operational voltage U 500 V AC, 440 V DC e N.C., 95-96 Conventional free air thermal current I 10 A th N.O., 97-98 6 A Rated frequency DC, 50/60 Hz Number of poles 1 N.O. + 1 N.C. I / Rated operational current AC-15 e acc. to IEC/EN 60947-5-1 for utilization category N.C., 95-96 110-120 V 3.00 A N.O., 97-98 1.50 A N.C., 95-96 220-230-240 V 1.50 A N.O., 97-98 1.50 A N.C., 95-96 440 V 1.00 A N.O., 97-98 1.00 A 480-500 V N.C., 95-96 1.00 A N.O., 97-98 1.00 A I / Rated operational current DC-13 e acc. to IEC/EN 60947-5-1 for utilization category 24 V N.C., 95-96 1.25 A N.O., 97-98 1.25 A 60 V N.C., 95-96 0.25 A N.O., 97-98 0.25 A 110-120-125 V N.C., 95-96 0.25 A N.O., 97-98 0.25 A 250 V N.C., 95-96 0.12 A N.O., 97-98 0.04 A Minimum switching capacity 17 V / 3 mA N.C., 95-96 Short-circuit protective device 10 A, Fuse type gG N.O., 97-98 6 A, Fuse type gG Rated impulse withstand voltage U 6 kV imp Rated insulation voltage U 690 V i Technical diagram Intermittent periodic duty (Op/h) 140 120 100 80 60 40 20 0 020406080100 (%) duty ratio t : Motor starting time a ABB C3 switching frequency 2CDC232005F0211 2CDC106054C0201