Page 752 - ABB_Motor _Protection_and_Control_catalogue_20221216

6/14 ABB MOTOR PROTECTION AND CONTROL

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TF42 thermal overload relays – 0.10 to 38.0 A

Technical data

Main circuit – Utilization characteristics according to IEC/EN
Type TF42
Standards IEC/EN 60947–4–1, IEC/EN 60947-5-1, IEC/EN 60947-1
Rated operational voltage Ue 690 V AC, 600 V DC
Rated frequency DC, 50/60 Hz, 400 Hz
Trip class 10
Number of poles 3
Duty time 100%
Operating frequency without early tripping Up to 15 operations/h, see "Technical diagram – Intermittent periodic duty"
Rated impulse withstand voltage Uimp 6 kV
Rated insulation voltage Ui 690 V AC
Auxiliary circuit according to IEC/EN
Type TF42
Rated operational voltage Ue 600 V
Conventional free air thermal current Ith N.C., 95-96 6 A
N.O., 97-98 4 A
Rated frequency DC, 50/60 Hz
Number of poles 1 N.O. + 1 N.C.
06
Ie / Rated operational current AC-15
acc. to IEC/EN 60947-5-1 for utilization category
110-120 V N.C., 95-96 3.00 A
N.O., 97-98 0.50 A
220-230-240 V N.C., 95-96 3.00 A
N.O., 97-98 0.50 A
440 V N.C., 95-96 0.75 A
N.O., 97-98 0.50 A
480-500 V N.C., 95-96 0.75 A
N.O., 97-98 0.50 A
Ie / Rated operational current DC-13
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
110-120-125 V N.C., 95-96 0.55 A
N.O., 97-98 0.55 A
250 V N.C., 95-96 0.27 A
N.O., 97-98 0.27 A
Minimum switching capacity 17 V / 3 mA
Short-circuit protective device N.C., 95-96 6 A, fuse type gG
N.O., 97-98 4 A, fuse type gG
Rated impulse withstand voltage Uimp 6 kV
Rated insulation voltage Ui 690 V
Technical diagram – Intermittent periodic duty
(Op/h)
140
120
100 a
switching frequency 60 t = 1.5 s
80
t = 0.5 s
a
t = 1 s
a
40
a
20 t = 3 s
a
t = 5 s
0 2CDC232004F0214
0 20 40 60 80 100 (%)
duty ratio
ta: Motor starting time