SIEMENS
4/77
Siemens IC 10 · 2017
Contactors for Special Applications
3TC contactors for switching DC voltage, 1-pole and 2-pole
4
1)
The opening delay times can increase if the contactor coils are damped
against voltage peaks. The 3TC44 contactors are not allowed to be fitted
with diodes.
Rated data of the auxiliary contacts,
see page 4/75
.
Type
3TC44
3TC48
3TC52
3TC56
Size
2
4
8
12
Control
Solenoid coil operating range
0.8 ... 1.1 x
U
s
Power consumption of the solenoid coils
(for cold coil and 1.0 x
U
s
)
• DC operation
-
Closing = Closed
W
10
19
30
86
• AC operation, 50 Hz coil
- Closing
VA/p.f.
68/0.86
300/0.5
640/0.48
1780/0.3
- Closed
VA/p.f.
10/0.29
26/0.24
46/0.23
121/0.22
• AC operation, 60 Hz coil
- Closing
VA/p.f.
95/0.79
365/0.45
730/0.38
2140/0.3
- Closed
VA/p.f.
12/0.3
35/0.26
56/0.24
140/0.29
• AC operation, 50/60 Hz coil
- Closing
at 50 Hz/60 Hz
VA/p.f.
79/73/0.83/0.78
--
- Closed
at 50 Hz/60 Hz
VA/p.f.
11/9/0.28/0.27
--
Operating times
(at 0.8 ... 1.1 x
U
s
)
Total break time = Opening delay + Arcing time
(The values apply up to and including 20 % undervoltage,
10 % overvoltage, as well as when the coil is cold and warm)
• DC operation
-
Closing delay
ms
35 ... 190
90 ... 380
120 ... 400
110 ... 400
-
Opening delay
1)
ms
10 ... 25
17 ... 28
22 ... 35
40 ... 110
• AC operation
-
Closing delay
ms
10 ... 40
20 ... 50
-
Opening delay
1)
ms
5 ... 25
5 ... 30
10 ... 30
• Arcing time
- DC-1
ms
20
- DC-3/DC-5
ms
30
Rated data of the main contacts
Load rating with DC
Utilization category DC-1, switching resistive loads (
L/R
1 ms)
• Rated operational currents
I
e
(at 55 °C)
Up to
U
e
750 V
A
32
75
220
400
• Minimum conductor cross-section
mm
2
6
25
95
240
• Rated power at
U
e
(
220 V DC: one conducting path,
> 220 V DC: two conducting paths in series)
At 220 V
kW
7
16.5
48
88
440 V
kW
14
33
97
176
600 V
kW
19.2
45
132
240
750 V
kW
24
56
165
300
Utilization categories DC-3 and DC-5,
shunt-wound and series-wound motors
(
L/R
15 ms)
• Rated operational currents
I
e
(at 55 °C)
Up to 220 V
A
32
75
220
400
440 V
A
29
75
220
400
600 V
A
21
75
220
400
750 V
A
7.5
75
170
400
• Rated power at
U
e
(
220 V DC: one conducting path,
> 220 V DC: two conducting paths in series)
At 110 V
kW
2.5
6.5
20
35
220 V
kW
5
13
41
70
440 V
kW
9
27
82
140
600 V
kW
9
38
110
200
750 V
kW
4
45
110
250
Switching frequency
Switching frequency
z
in operating cycles/hour
AC/DC operation
• With resistive load DC-1
h
-1
1 500
1 000
• For inductive load DC-3/DC-5
h
-1
750
600
Conductor cross-sections
Main conductors
(1 or 2 conductors can be connected)
Screw terminals
• Solid
mm
2
2 x (2.5 ... 10)
2 x (6 ... 16)
--
• Finely stranded with end sleeve
mm
2
2 x (1.5 ... 4)
--
• Stranded with cable lug
mm
2
2 x 16
2 x 35
2 x 120
2 x 150
• Pin-end connector to DIN 46231
mm
2
2 x (1 ... 6)
--
• Busbars
mm
--
15 x 2.5
25 x 4
2 x (25 x 3)
• Terminal screw
M5
M6
M10
Auxiliary conductors
(1 or 2 conductors can be connected)
• Solid
mm
2
2 x (1 ... 2.5)
• Finely stranded with end sleeve
mm
2
2 x (0.75 ... 1.5)
© Siemens AG 2016