SIEMENS
3/144
Siemens IC 10 · 2017
Power Contactors for Switching Motors
3TF2 miniature contactors, 3-pole
3
1)
The following applies: Max. permissible rated operational current
I
e
/AC-4
r
I
e
/AC-3 up to 500 V for reduced contact endurance and reduced
switching frequency.
Contactor
Type
3TF28,
3TF29
3TF20. .-0. . .,
3TF22. .-0. . .
3TF20. .-3. . .,
3TF20. .-6. . .,
3TF20. .-7. . .
Size
00
Rated data of the main contacts
Load rating with AC
Utilization category AC-1
Switching resistive load
• Rated operational current
I
e
(at 40 °C)
Up to 400/380 V
A
18
690/660 V
A
18
--
• Rated operational current
I
e
(at 55 °C)
400/380 V
A
16
690/660 V
A
16
--
• Rated power of AC loads
At 230/220 V
kW
6.0
P.f.
1
400/380 V
kW
10
500 V
kW
13
690/660 V
kW
17
--
• Minimum conductor cross-section for loads with
I
e
mm
2
2.5
Utilization categories AC-2 and AC-3
• Rated operational current
I
e
Up to 220 V
A
5.1
9.0
230 V
A
5.1
9.0
380 V
A
5.1
9.0
400 V
A
5.1
8.4
500 V
A
4.8
6.5
660 V
A
4.8
5.2
--
690 V
A
4.8
5.2
--
• Rated power for motors with slipring or squirrel cage
at 50 and 60 Hz and
At 110 V
kW
0.7
1.2
115 V
kW
0.7
1.2
120 V
kW
0.7
1.3
127 V
kW
0.8
1.4
200 V
kW
1.2
2.2
220 V
kW
1.3
2.4
230 V
kW
1.4
2.5
240 V
kW
1.5
2.6
380 V
kW
2.2
4.0
400 V
kW
2.2
4.0
415 V
kW
2.5
4.0
440 V
kW
2.5
4.0
460 V
kW
2.7
4.0
500 V
kW
2.9
4.0
575 V
kW
3.2
4.0
--
660 V
kW
3.8
4.0
--
690 V
kW
4.0
Utilization category AC-4
(Contact endurance approx. 200 000 operating cycles at
I
a
= 6 x
I
e
)
• Rated operational current
I
e
1)
Up to 400 V
A
1.9
2.6
690 V
A
1.4
1.8
--
• Rated power for motors with squirrel cage at 50 and
60 Hz and
At 110 V
kW
0.23
0.32
115 V
kW
0.24
0.33
120 V
kW
0.26
0.35
127 V
kW
0.27
0.37
200 V
kW
0.42
0.58
220 V
kW
0.47
0.64
230 V
kW
0.49
0.67
240 V
kW
0.51
0.70
380 V
kW
0.81
1.10
400 V
kW
0.85
1.15
415 V
kW
0.93
1.20
440 V
kW
1.0
1.27
460 V
kW
1.0
1.33
500 V
kW
1.1
1.45
575 V
kW
1.0
1.30
--
660 V
kW
0.86
1.10
--
690 V
kW
0.89
1.15
--
Thermal load capacity
10 s current
A
70
Power loss per conducting path
At
I
e
/AC-3
W
0.3
© Siemens AG 2016