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Siemens IC 10 · 2017
Power Contactors for Switching Motors
SIRIUS 3RT12 and 3TF6 vacuum contactors
3
1)
For ambient temperatures > 55 °C, only 3TF6.33-.Q..-Z A02 contactors
(= without connection of the main current path circuit) can be used.
Then, derating is also possible with these contactors:
- AC-1:
I
e
= 782 A, 644 operating cycles/h;
- AC-3: Operating range 0.85 to 1.05 x
U
s
, 460 operating cycles/h,
mech. endurance 5 million operating cycles, lateral clearance 10 mm.
2)
For 3TF6.-.C.. the following applies:
-
IP00 without cover (the connecting bar is reached directly from the front)
-
IP00 with cover for conductor entry
-
IP20 on the front plate with cover.
3)
For 3TF6.-.Q../-.D.. the following applies:
-
IP00 without box terminal (the connecting bar, series resistor and the
3TC44 reversing contactor are reached directly from the front)
-
IP00 with box terminal (the series resistor and the 3TC44 reversing
contactor are reached directly).
SIRIUS vacuum contactors
Vacuum contactors
Type
3RT1264
3RT1265
3RT1266
3RT1275
3RT1276
3TF68
3TF69
Size
S10
S12
14
General data
Dimensions (W x H x D)
mm
145 x 210 x 206
160 x 214 x 225
230 x 276 x 237
230 x 295 x 237
Permissible mounting position
The contactors are designed for operation on a vertical
mounting surface.
• To easily replace the laterally mounted auxiliary
switches it is recommended to maintain a minimum
distance of 30 mm between the contactors.
No
Yes
• If mounted at a 90° angle (current paths are horizontal-
ly above each other), the switching frequency is
reduced by 80 % compared with the normal values.
No
Yes
Mechanical endurance
Operat-
ing cy-
cles
10 million
5 million
Electrical endurance
Contact endurance of the main contacts
See page 3/125
See page 3/126
Rated insulation voltage
U
i
(pollution degree 3)
kV
1
Rated impulse withstand voltage
U
imp
kV
8
Protective separation
between the coil and the main
contacts acc. to IEC 60947-1, Appendix N
V
690
1 000
Mirror contacts
A mirror contact is an auxiliary NC contact that cannot
be closed simultaneously with an NO main contact.
Yes, acc. to IEC 60947-4-1, Appendix F
Yes, acc. to IEC 60947-4-1,
Appendix F
One NC contact each must be con-
nected in series for the left and right
auxiliary switch block respectively.
Permissible
ambient temperature
• During operation
°C
-25 ... +60
-25 ... +55
1)
• During storage
°C
-55 ... +80
-55 ... +80
Degree of protection
acc. to IEC 60529
• On the front
IP00
(IP20 with box terminal/cover)
2)3)
• Connecting terminal
IP00 (for higher degree of protection, use additional terminal covers)
Touch protection
acc. to IEC 60529
Finger-safe for vertical touching from the front with cover
Shock resistance
• Rectangular pulse
-
AC operation
g
/ms
8.5/5 and 4.2/10
8.1/5 and 4.7/10
9.5/5 and 5.7/10
-
DC operation
g
/ms
8.5/5 and 4.2/10
9/5 and 5.7/10
8.6/5 and 5.1/10
• Sine pulse
-
AC operation
g
/ms
13.4/5 and 6.5/10
12.8/5 and 7.4/10
13.5/5 and 7.8/10
-
DC operation
g
/ms
13.4/5 and 6.5/10
14.4/5 and 9.1/10
13.5/5 and 7.8/10
Electromagnetic compatibility (EMC)
See page 3/124
~
o
k
22,5°
22,5°
22,5°
22,5°
NSB0_00650c
NSB0_00649a
22,5° 22,5°
90°
90°
© Siemens AG 2016