Page 174 - contactors_motor_protection_for_rolling_stock_application

TF42-B thermal overload relays – 0.10 to 38.0 A
Technical data

Main circuit – Utilization characteristics according to IEC/EN
Type TF42-B
Standards IEC/EN 60947-1, IEC/EN 60947-4-1, IEC/EN 60947-5-1, IEC 60077-1 (applicable parts),
IEC 60077-2 (applicable parts)
2 Fire and smoke standards EN 45545 (Hazard levels HL2, HL3)
Rated operational voltage U 690 V AC
e
Rated frequency 50/60 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 U 6 kV
imp
Rated insulation voltage U i 690 V AC
Auxiliary circuit according to IEC/EN
Type TF42-B
Rated operational voltage U 600 V
e
Conventional free air thermal current I th 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.
I / Rated operational current AC-15
e
acc. to IEC/EN 60947-5-1 for utilization category
110-120 V N.C., 95-96 3.00 A
N.O., 97-98 0.75 A
220-230-240 V N.C., 95-96 3.00 A
N.O., 97-98 0.75 A
440 V N.C., 95-96 0.75 A
N.O., 97-98 0.75 A
480-500 V N.C., 95-96 0.75 A
N.O., 97-98 0.75 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
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 U imp 6 kV
Rated insulation voltage U i 690 V

Technical diagram – Intermittent periodic duty
(Op/h)
140
120
100 a
switching frequency 80 t = 1.5 s
t = 0.5 s
60
a
a
t = 1 s
40
a
a
20 t = 3 s
t = 5 s
0 2CDC232004F0214
0 20 40 60 80 100 (%)
duty ratio
2CDC106106C0201
t : Motor starting time
a
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