3RA13, 3RA14 Contactor Assemblies
3RA14 Contactor Assemblies for Wye-Delta Starting
3RA14 complete units, 3 ... 75 kW
■
Overview
The 3RA14 contactor assemblies for wye-delta starting can be
ordered as follows:
Sizes S00 to S3:
• Fully wired and tested, with electrical interlock, dead interval
of up to 10 s on reversing (size S00 with electrical and
mechanical interlocks)
Sizes S00 to S12:
• As components for customer assembly.
There is also a range of accessories (auxiliary switch blocks,
surge suppressors, etc.) that must be ordered separately.
For overload relays for motor protection, see "Protection
Equipment: Overload Relays -> 3RB2 Solid-State Overload
Relays".
The 3RA14 contactor assemblies have screw terminals and are
suitable for screwing or snapping onto 35 mm standard
mounting rails.
Fully wired and tested 3RA14 contactor assemblies have one
unassigned NO contact which is mounted onto the front of the
K3 delta contactor.
A solid-state time-delay auxiliary switch block is snapped onto
the front of the complete contactor assemblies, size S00 up to
7.5 kW, while a timing relay is mounted onto the side of sizes S0
to S3, 11 kW to 75 kW.
Rated data
at AC 50 Hz 400 V
Rating
kW
5.5
Operational motor current
current
I
e
A
A
12
1.9 ... 2.8
2.4 ... 3.4
3.1 ... 4.3
3.8 ... 5.5
4.8 ... 6.9
6 ... 8.6
7.8 ... 10.9
9.5 ... 13.8
12.1 ... 17
3.1 ...
3.8 ...
4.8 ...
6 ...
7.8 ...
9.5 ...
12.1 ...
15.5 ...
19 ...
24.1 ...
29.3 ...
34.5 ...
9.5 ...
12.1 ...
15.5 ...
19 ...
24.1 ...
31 ...
37.9 ...
48.3 ...
62.1 ...
69 ...
4.3
5.5
6.9
8.6
10.9
13.8
17.2
21.5
25
34
37.9
40
13.8
17.2
21.5
27.6
34
43
55.2
65
77.8
86
S00-S00-S00
Size
Line/delta
contactor
3RT10 15
Wye contactor
Order No.
complete
3RA14 15-8XB31-1...
Accessories for
customer assembly
Timing relay
Installation kit A,
for double infeed
--
3
A dead interval of 50 ms on reversing is already integrated in the
timing relay function.
3RT10 15
3RT19 16-2G.51
7.5
17
3RT10 17
3RA141 6-8XB31-1...
S0-S0-S0
3RT10 24
3RT10 24
3RA14 23-8XC21-1...
3RP15 74-1N.30
3RP15 74-1N.30
--
11
25
15
18.5
22
32
40
50
3RT10 26
3RA14 25-8XC21-1...
S2-S2-S0
3RT10 34
3RT10 26
3RA14 34-8XC21-1...
3RP15 74-1N.30
3RA19 33-2C
3)
3RT10 35
S2-S2-S2
3RT10 36
S3-S3-S2
3RT10 44
3RT10 35
3RT10 34
37
45
55
80
86
115
--
3RA14 35-8XC21-1...
3RA14 36-8XC21-1...
3RA14 44-8XC21-1...
3RP15 74-1N.30
3RA19 33-2B
3)
3RA19 43-2C
3)
75
90
110
132
160
200
250
315
355
400
500
150
160
195
230
280
350
430
540
610
690
850
31 ... 43.1
37.9 ... 55.2
48.3 ... 69
62.1 ... 77.6
77.6 ... 108.6
98.3 ... 129.3
120.7 ... 150
86
86
86
86
95
95
277
277
277
277
... 160
... 195
... 230
... 280
... 350
... 430
... 540
... 610
... 690
... 850
3RT10 45
S6-S6-S3
3RT10 54
3RT10 55
3RT10 56
S10-S10-S6
S12-S12-S10
3RT10 64
3RT10 65
3RT10 75
3RT10 76
3RT10 36
3RT10 44
3RT10 45
3RT10 46
3RT10 54
3RT10 55
3RT10 64
3RT10 65
3RT10 66
3RA14 45-8XC21-1...
--
3RP15 74-1N.30
--
--
--
3RP15 74-1N.30
3RP15 74-1N.30
--
--
1) Installation kit contains mechanical interlock, 3 connecting clips; wiring
connectors on the top (connection between mains and delta contactor)
and on the bottom (connection between delta and wye contactor); neutral
point.
2) The installation kit contains 5 connecting clips; wiring connectors on the
top (connection between mains and delta contactor) and on the bottom
(connection between delta and wye contactor); star jumper.
3) Installation kit contains wiring connector on the bottom (connection
between delta contactor and wye contactor) and star jumper.
4) Wiring connector on top from reversing contactor assembly (note
conductor cross-sections).
5) Only use wiring connector on top of reversing contactor assembly (note
conductor cross-sections); star jumpers must be ordered separately.
3/46
Siemens LV 1 · 2006
SIEMENS [ Siemens Semiconductor Group ]
