Catalog LV1 T 2009 Chapter 3 EN

© Siemens AG 2009
3RT, 3TB, 3TF Contactors for Switching Motors
Contactors Type 3TF28
3TF29
3TF2 contactors, 3-pole, 2.2 ... 4 kW
3TF20 . .-0. . .,
3TF22 . .-0. . .
3TF20 ..-3...,
3TF20 ..-6...,
3TF20 ..-7...
Size S00 S00 S00
Main circuit
AC capacity
Utilization category AC-5a
Switching gas discharge lamps
Per main current path at 230/220 V
Rated power Rated operational current
per lamp
- Uncorrected
per lamp (A)
L18W 0.37 Units43 L36W 0.43 Units37 L58W
- DUO switching
0.67 Units23 L18W 011 Units144 L36W 0.21 Units76 L58W 0.32 Units50 Switching gas discharge lamps with correction, solid-state ballast
Per main current path at 230/220 V
Rated power
Capacitance Rated operational current
per lamp
- Parallel correction
(μF)
per lamp (A)
L18W 4.5 0.11 Units22 L36W 4.5 0.21 Units22 L58W
- With solid-state ballast (single
lamp)
7 0.31 Units14 L18W 6.8 0.10 Units63 L36W 6.8 0.18 Units35 L58W
- With solid-state ballast (two
lamps)
10 0.27 Units23 L18W 10 0.18 Units35 L36W 10 0.35 Units18 L58W 22 0.52 Units12 Utilization category AC-5b,
switching incandescent lamps
Per main current path at 230/220 V
kW 1.6 --
Utilization category AC-6a,
switching AC transformers
Rated operational current Ie - For inrush current n = 20 At 400 V A 2.9 5.1 5.1
- For inrush current n = 30
Rated power P
At 400 V A 1.9 3.3 3.3
- For inrush current n = 20 Up to 230/220 V kVA 1.14 2.0 2.0
400/380 V kVA 2 3.5 3.5
500 V kVA 4.1 4.6 4.6
690/660 V kVA 5.4 6.0 --
- For inrush current n = 30 Up to 230/220 V kVA 0.74 1.3 1.3
400/380 V kVA 1.3 2.3 2.3
500 V kVA 2.8 3.1 3.1
690/660 V kVA 3.6 4.0 --
For deviating inrush current factors x, the power must be recalculated as follows:
Px = Pn30 x(30/x)
Utilization category AC-6b
Switching low-inductance (low-loss, metallized dielectric) AC capacitors
Utilization category AC-7a
Switching low inductive loads in household appliances
No switching capacity
Rated operational current Ie (at 55 °C) At 400/380 V
690/660 V
A
A
16
16
16
16
16
--
Rated power at 50 and 60 Hz At 230/220 V kW 6 6 6
400/380 V kW 10 10 10
Minimum conductor cross-section for loads with Ie mm 2
Utilization category AC-7b
Switching motor loads in household appliances
2.5 2.5 2.5
Rated operational current Ie Up to 220 V
230 V
A
A
5.1
5.1
9.0
9.0
9.0
9.0
380 V A 5.1 9.0 9.0
400 V A 5.1 8.4 8.4
Rated power of motors At 110 V kW 0.68 1.2 1.2
at 50 and 60 Hz and 220 V kW 1.3 2.4 2.4
230 V kW 1.4 2.5 2.5
240 V kW 1.5 2.6 2.6
380 V kW 2.2 4.0 4.0
400 V kW 2.4 4.0 4.0
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