SIEMENS
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Siemens IC 10 · 2017
Power Contactors for Switching Motors
3TF2 miniature contactors, 3-pole
3
1)
Applies to 50/60 Hz coil:
At 50 Hz, 1.1 x
U
s
,
side-by-side mounting and 100 % ON period the max.
ambient temperature is +40 °C.
2)
According to excerpt from IEC 60947-4-1
Type of coordination "1":
Destruction of the contactor and the overload relay is permissible.
The contactor and/or overload relay can be replaced if necessary.
Type of coordination "2":
The overload relay must not suffer any damage. Contact welding on the
contactor is permissible, however, if the contacts can be easily separated.
3)
A short-circuit current of
I
q
6 kA applies to type of coordination "2".
Type
3TF20, 3TF28
3TF22, 3TF29
Size
00
General data
Dimensions (W x H x D)
• Basic unit
mm
45 x 48 x 63
--
• Basic unit with mounted auxiliary switch block
mm
45 x 48 x 91
• Basic unit with 3TX4490 surge suppressor
mm
45 x 48 x 88
45 x 48 x 116
Permissible mounting position
Any
Mechanical endurance
• AC operation
Operat-
ing
cycles
10 million
• DC operation
30 million
• Auxiliary switch block
10 million
Rated insulation voltage
U
i
(Pollution degree 3)
• Screw terminals
V
690
690
(auxiliary contacts 500 V)
• Flat connectors 6.3 mm x 0.8 mm
V
500
--
• Solder pin connections
V
500
--
Rated impulse withstand voltage
U
imp
(Pollution degree 3)
• Screw terminals
kV
6 (control circuit max. 4 kV)
• Flat connectors 6.3 mm x 0.8 mm
kV
6
--
• Solder pin connections
kV
6
--
Protective separation
between coil and main contacts
(according to IEC 60947-1, Appendix N)
V
Up to 300
Mirror contacts
A mirror contact is an auxiliary NC contact that cannot be closed
simultaneously with an NO main contact.
Yes, this applies to both the basic
unit as well as to between the basic
unit and the mounted auxiliary switch
block acc. to IEC 60947-4-1, Appen-
dix F
Yes, acc. to IEC 60947-4-1,
Appendix F and SUVA
Permissible ambient temperature
1)
• During operation
°C
-25 ... +55
• During storage
°C
-55 ... +80
Degree of protection
acc. to IEC 60529
• On front
IP20 (with screw terminals)
• Connecting terminal
IP20 (with screw terminals)
Touch protection
acc. to IEC 60529
Finger-safe (for screw terminals)
Shock resistance
• Without 3TX44 auxiliary switch block
-
Rectangular pulse
AC operation
g
/ms
8.3/5 and 5.2/10
--
DC operation
g
/ms
11.3/5 and 9.2/10
--
-
Sine pulse
AC operation
g
/ms
13/5 and 8/10
--
DC operation
g
/ms
17.4/5 and 12.9/10
--
• With 3TX44 auxiliary switch block
-
Rectangular pulse
AC operation
g
/ms
5/5 and 3.6/10
DC operation
g
/ms
9/5 and 6.9/10
9/5 and 7.3/10
-
Sine pulse
AC operation
g
/ms
7.8/5 and 5.6/10
DC operation
g
/ms
13.9/5 and 10.1/10
14/5 and 11/10
Short-circuit protection
Main circuit
2)
• Fuse links, operational class gG:
LV HRC, type 3NA; DIAZED, type 5SB; NEOZED, type 5SE
according to IEC 60947-4-1
-
Type of coordination "1"
A
25
-
Type of coordination "2"
3)
A
10
- Weld-free
A
10
• Miniature circuit breaker with C characteristic
A
10
Auxiliary circuit
Short-circuit test
• With fuse links of operational class gG:
DIAZED, type 5SB; NEOZED, type 5SE
with short-circuit current
I
k
= 1 kA acc. to IEC 60947-5-1
A
6
W
H
D
© Siemens AG 2016