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3VT1 Molded Case Circuit Breakers up to 160 A
Circuit breakers · Switch disconnectors
2/11
Siemens LV 36 · 2008
2
■
Design
Installation and connection
Main circuit
• Is connected, using Cu or AI busbars, cables, and possibly
cables with cable lugs.
• For further connecting options, connecting sets can be used
(see page 2/9)
.
• Generally, conductors from the power supply are connected
to input terminals 1, 3, 5, (N) and conductors from the load to
terminals 2, 4, 6, (N). It is possible to reverse the current flow
inside the unit (i. e. infeed from below) without reducing the
rated short-circuit ultimate breaking capacity
I
cu
.
• In case of infeed from below, the units must be fitted with
3VT9 100-8CE30 phase barriers also on the side of terminals
2, 4, 6
(see pages 2/35 and 2/36)
.
• We recommend painting the connection busbars.
• Input and output connectors/busbars must be mechanically
reinforced to avoid transferring electrodynamic forces to the
circuit breaker during short-circuiting.
• The way of connecting the power circuit must observe the
deionization space of the circuit breaker/switch disconnector
(see pages 2/35 and 2/36)
.
Recommended cross-section of cables, busbars and flexibars
Auxiliary circuits
Switches, shunt trip releases or undervoltage releases are con-
nected directly to the terminals of the circuit breaker/switch dis-
connector using flexible Cu conductors with cross-section
0.5 ... 1 mm
2.
Conductor cross-sections of main terminals
Rated
current
I
n
Conductor cross-section S
Busbars W x H
Cu
AI
Cu
AI
A
mm
2
mm
2
mm
mm
16
2,5
--
--
--
20
2,5
--
--
--
25
4
--
--
--
32
6
--
--
--
40
10
--
--
--
50
10
16
--
--
63
16
25
--
--
80
25
35
--
--
100
35
50
16 x 2; 12 x 3 16 x 4; 12 x 4
125
50
95
16 x 4; 12 x 4 16 x 5; 12 x 6
160
70
120
16 x 5; 12 x 6 --
Order No.
Maximum
permitted
current
I
max
Maximum permissible conductor cross-sectionsS
Max. width of
busbars and
cable lugs
Technical
information
Cable type
Sector-shaped
conductor, stranded
Sector-shaped con-
ductor, solid
Round conductor,
stranded
Round conductor,
solid
A
mm
2
mm
2
mm
2
mm
2
mm
3-pole
3VT9 100-4TF30
160
2 x 25 ... 120
2 x 25 ... 120
2 x 25 ... 120
2 x 25 ... 120
pg. D17
3VT9 100-4TA30
160
16
3VT9 100-4RC30
160
16
pg. D18
3VT9 100-4TN30
10/16
1,5 ... 2,5/4 ... 6
--
--
3VT9 100-4ED30
160
30
pg. D18
4-pole
3VT9 100-4TF40
160
2 x 25 ... 120
2 x 25 ... 120
2 x 25 ... 120
2 x 25 ... 120
pg. 12
3VT9 100-4TA00
160
16
3VT9 100-4RC00
160
16
pg. 13
3VT9 100-4TN00
10/16
1,5 ... 2,5/4 ... 6