i21_01.fm Seite 2 Mittwoch, 12. April 2000 1:00 13
Miniature Circuit-Breakers (MCBs)
General Data
Product Overview
Miniature Circuit-Breakers (MCBs)
Design
Tripping characteristics
Rated current In
Rated breaking capacity
Energy limitation class
Power supply company product range
5SP3
E
16 - 100 A
25 000
5SQ2
B
C
6 - 40 A
0.5 - 63 A
3 000
5SQ3
C
0.5 - 50 A
4 500
3
5SX2
A
1
- 40 A
B
6
- 50 A
6 000
3
C
0.3 - 63 A
D
0.5 - 50 A
B
C
6 - 50 A
0.5 - 50 A
10 000
3
B
6
C
0.5 - 32 A
4 500
3
B
C
40 - 63 A
40 - 125 A
D
40 - 100 A
Standard product range
5SX4
AC/DC product range
5SX5
- 32 A
10 000 T4
High current product range
5SX7
10 000
■ Definitions
1 MW =Modular width of 18 mm
N-type =Device mounting
depth of 55 mm
2/2
Depth 70 mm=
Device mounting depth 70 mm
Siemens I 2.1 · 2000
i21_01.fm Seite 3 Mittwoch, 12. April 2000 1:00 13
Miniature Circuit-Breakers (MCBs)
General Data
Summary of Technical Data
5SX2
5SX4
5SX5
5SX7
A, B, C, D
B, C
B, C
B, C, D
1
2
•
•
•
•
•
•
•
•
3
•
•
•
•
•
•
Tripping characteristics
No. of poles
•
•
4
1+N
3+N
Rated voltage
Operating voltage
min. AC/DC
V AC
230/400
V DC
-
220/440
-
24
V
60 1)
max. DC
V/pole
max. AC
V
440
60 1)
220
Rated breaking capacity
acc. to DIN VDE 0641
Insulation coordination
Rated insulation voltage
AC
kA
6
10
4.5
10
DC
kA
-
-
10
-
AC
V
250/440
Degree of pollution for
overvoltage category III
Degree of protection
Flammability
Mounting
2
3
IP 00 according to DIN 40 050, IP 40 when mounted in distribution boards
Category IIb according to DIN VDE 0304 Part 3
1) r Battery charging voltage 72 V.On a 35 mm mounting rail (DIN EN 50 022); for 5SX7, also screw mounting
Tunnel terminals on both ends; 5SX2, 5SX4, 5SX5 combined terminal below for
simultaneous connection to busbars (fork-type) and feeder cables
Terminals
Conductor cross sections
Solid and stranded, max.
• Upper terminal
• Lower terminal
mm2
mm2
16
25
50
50
Finely stranded with end sleeves, max.
• Upper terminal
• Lower terminal
mm2
mm2
10
16
35
35
Nm
3.5
As required, observe the polarity for DC applications
Terminal tightening torque
max.
Supply connection
As required
On the average 20 000 operations at rated load
Mounting position
Service life
Ambient temperature
°C
-25 to +45, occasionally +55, max. 95 % humidity, storage temperature: -40 to +75
According to IEC 60 068-2-30, 6 cycles
m/s2
60 at 10 Hz to 150 Hz according to IEC 60 068-2-6
Resistance to climate
Resistance to vibration
Siemens I 2.1 · 2000
5
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i21_01.fm Seite 4 Donnerstag, 6. April 2000 1:04 13
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Applications
■ Functional design,
■ Features
mode of operation
MCBs of the N System primarily
protect cables and conductors
against overload and short
circuit. Thus, they also protect
electrical equipment against
overheating according to
DIN VDE 0100 Part 430.
Under certain conditions, MCBs
also protect against shock
currents caused by excessive
touch voltage due to insulation
failure according to DIN VDE
0100 Part 410.
Further, due to the fixed rated
current settings of MCBs, it is
also possible to protect motors
in a limited form.
For the respective application,
there are four different tripping
characteristics available which
will be individually described.
The standards EN 60 898,
DIN VDE 0641 Part 11 and
IEC 60 898 form the basis for
the design and approval of the
MCBs.
For applications in industry and
in system and plant engineering
where MCBs of the N System
are used, add-on accessories
are available, such as
• auxiliary contacts (AC),
• fault signal contacts (FC),
• shunt trips (ST),
• undervoltage releases (UR)
• and RCCB modules.
2/4
MCBs of the N System operate
using a delayed overload
current/time-dependent thermal
release (thermal bimetal) for low
overcurrents and an instantaneous electromagnetic release
for higher overload and shortcircuit currents.
The special contact materials
used assure a long service life
and offer a high level of protection against contact welding.
MCBs of the N System significantly limit the let-through
current when a fault occurs due
to the ultra-fast contact separation and the quick quenching of
the arc in the arc-chamber.
Thus, generally, they fall below
the permissible limiting I 2t values of energy limiting class 3,
specified in DIN VDE 0641
Part 11 by 50%. This guarantees excellent selectivity with
the upstream overcurrent protective devices.
• High rated breaking capacity
up to 10 000 A according to
EN 60 898
• Excellent current limiting and
selectivity
• Tripping characteristics A, B,
C and D
• Add-on accessories, quick
mounting on site using snapon mechanism
• Combined terminal allows
busbar and feeder cable to be
simultaneously connected
• Disconnector characteristics
according to DIN VDE 0660
Part 107 (5SX7)
• Main switch characteristics
according to EN 60 204
(5SX7)
• Separate switch position
indicator (5SX7)
• The terminals are safe from
finger touch and safe from
touch by the back of the hand
acc. to DIN VDE 0106 Part 100
• Insertion guide for fast and
easy access to the terminal
• Handle locking device effectively prevents unauthorized
operation of the handle
Siemens I 2.1 · 2000
i21_01.fm Seite 5 Donnerstag, 6. April 2000 1:04 13
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Application examples
Feeder cables from below with cross sections up to 25 mm2 and
3-pole 5ST2 144 busbars can be simultaneously connected at the
combined terminal of the MCB.
Feeder cables from below with cross sections up to 35 mm2 and
double-pole 5ST2 143 busbars can be simultaneously connected
using the terminal 5ST2 166.
Cables connected from the top use the same principle.
Feeder cables from above with cross sections up to 35 mm2 can be
connected to 5ST2 144 busbars through supplementary terminal
5ST2 157.
Feeder cables with cross sections up to 25 mm2 and 5ST2 165
busbars can be simultaneously connected at the combined
terminal of the MCB using the auxiliary contacts mounted on-site.
Siemens I 2.1 · 2000
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i21_01.fm Seite 6 Donnerstag, 6. April 2000 1:04 13
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Cable protection
The following explanation describes the relative value of the
cable/conductors and the
MCBs. In the standards
EN 60 898/1991 and
IEC 60 898/1987, modified in
11/91, the new characteristics
B, C and D were defined, and
adopted in DIN VDE 0641
Part 11/8.92.
The task of MCBs is to protect
cables and conductors against
thermal overload of the insulation due to overcurrents and
short circuits. The tripping characteristics of the MCBs match
the load curves of the cables
and conductors.
1st condition
Ib ≤ In ≤ Iz
2nd condition
I2 ≤ 1.45 Iz
I
Therefore, all three characteristics can be certified. Characteristic B replaces the earlier
characteristic L. The characteristic G according to CEE 19, 1st
edition is still defined, but in
practice it is going to be replaced by characteristic C.
In the field, the new tripping
characteristics with their common thermal release operating
level I2 = 1.45 x In provide the
advantage that the miniature
circuit-breakers for the protection of cables and conductors
can be more easily and clearly
assigned in case of overload,
and more specifically, according to the condition: In ≤ Iz.
Ib
A I2-6350b
Operating current: current determined by the load at fault-free operation
I
1,45 x
Iz
Permissible continuous current of a conductor for which the continuous limit
temperature of the insulation is not exceeded
Time t
1.45 x Iz
Maximum permissible time-limited overload current at which the insulation
properties are not reduced in a safety-relevant way if the continuous limit
temperature is briefly exceeded
In
Rated current: Current for which the circuit-breaker has been designed and
to which other rated quantities are referred
I1
Low test current: A current, which does not lead to
tripping under defined conditions
I2
High test current: A current, which trips the device within one hour (In ≤ 63
A) under defined conditions
I3
Tolerance limits
I4
Holding current of the instantaneous release (short-circuit release)
I5
Tripping current of the instantaneous release (short-circuit release)
Current I
■ Conductor cross sections
Assignment of MCBs according to DIN VDE 0641 Part 11
to copper conductors with PVC insulation for
installation type C1) and R= 30 °C:
Rated cross section
Iz (conductor)
Continuous current in A acc. to
DIN VDE 0298 T4 and
DIN VDE 0100 T430 Supplement sheet 1
Rated current MCB
2 conductors
3 conductors
2 conductors
3 conductors
mm2
1.5
A
16
A
16
A
19.5
A
17.5
2.5
4
25
32
20
32
26
35
24
32
6
10
40
63
40
50
46
63
41
57
16
25
80
100
63
80
85
112
76
96
35
125
100
138
119
1) Example: Rising, multi-core conductors on/in the wall.
2/6
Siemens I 2.1 · 2000
i21_01.fm Seite 7 Donnerstag, 6. April 2000 1:04 13
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Tripping characteristics according to EN 60 898, DIN VDE 0641 Part 11
Tripping characteristic B
• Cable and line protection
mainly in residential buildings,
proof regarding shock-hazard
protection is not necessary
AI2-6663b
20
10
6
4
2
1
40
20
20
2
Seconds
Seconds
10
6
4
1
0,6
0,4
0,02
1,5 2
3 4 5 6 8 10 15 20
Multiple of rated current
30
A I2-6353c
20
10
6
4
Tripping characteristic D
• For applications involving
equipment generating significant pulses, e.g. transformers,
solenoid valves, capacitances
2
1
40
20
3 4 5 6 8 10 15 20
Multiple of rated current
30
A I2-6354c
60
40
20
10
6
4
2
1
40
20
10
6
4
Seconds
10
6
4
2
1
0,6
0,4
2
1
0,6
0,4
0,2
0,2
0,1
0,06
0,04
0,1
0,06
0,04
0,02
0,02
0,01
1,5 2
120
Tripping time
Minutes
60
40
0,01
1
Minutes
1
120
Tripping time
1
0,6
0,4
0,1
0,06
0,04
0,02
Seconds
2
0,2
0,1
0,06
0,04
Siemens I 2.1 · 2000
10
6
4
1
40
0,2
Tripping characteristic C
• Cable and line protection,
advantageous in case of higher inrush currents, e.g. lamps,
motors
20
2
10
6
4
0,01
A I2-6352c
60
40
Tripping time
Minutes
60
40
1,13 1,45
120
Minutes
1,13 1,45
120
Tripping time
Tripping characteristic A
• For limited semiconductor
protection
• Protection of measuring
circuits with transformers
• Protection of circuits with long
cable lengths which will
require tripping within 0.4 s
according to DIN VDE 0100
Part 410
1 1,5 2
3 4 5 6 8 10 15 20
Multiple of rated current
30
0,01
1
1,5 2
3 4 5 6 8 10 15 20
Multiple of rated current
2/7
30
i21_01.fm Seite 8 Donnerstag, 6. April 2000 1:04 13
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Tripping characteristics
Tripping performance at an ambient temperature of 30°C
Tripping
Standards
characteristics
Thermal release
Test currents:
Electromagnetic release
Test currents:
Low test
High test
Tripping time
current
current
63 A ≤ In
I1
I2
t
1.13 x In
A
1.45 x In
B
IEC 60 898/EN 60 898
DIN VDE 0641 Part 11
C
1.13 x In
1.45 x In
1.13 x In
1.45 x In
D
1.13 x In
1.45 x In
Hold
≤ 125 A
>2h
<1h
<2h
>1h
>2h
<1h
<2h
>1h
>2h
<1h
<2h
>1h
>2h
<1h
<2h
Tripping time
latest at
I4
>1h
Trips at the
I5
t
≥ 0.1 s
2 x In
3 x In
< 0.1 s
≥ 0.1 s
3 x In
5 x In
< 0.1 s
≥ 0.1 s
5 x In
10 x In
< 0.1 s
≥ 0.1 s
10 x In
20 x In
< 0.1 s
(IEC 60 898: 50 x In)
At other ambient temperatures,
the currents of the delayed tripping change by approximately
5 % for each 10 K temperature
difference. More specifically
they increase for temperatures
below 30°C and decrease for
temperatures above 30° C.
For DC, the limit currents of the
instantaneous tripping increase by a factor of 1.2.
If more than one circuit in a
series of MCBs is loaded, this
has an impact on the characteristic as a result of an increased
ambient temperature.
In this case, an additional correction factor must be applied,
referred to the rated miniature
circuit-breaker current.
No.
1
2-3
4-6
>7
K
1.00
0.90
0.88
0.85
■ Rated breaking capacity
For MCBs, there are special requirements with regard to the
breaking capacity. The values
are standardized and are
determined according to the
testing conditions of EN 60 898
and DIN VDE 0641 Part 11.
The most usual values are
6 000 and 10 000 .
For other reference voltages
and other “simpler“ test
conditions, other values can be
specified which lie above those
of EN 60 898 and DIN VDE 0641
Part 11.
An example of another standard
is EN 60 947-2 or DIN VDE 0660
Part 101 for MCBs.
Rated breaking capacity
EN 60 898 (IEC 60 898)
1-pole
2, 3, 4-pole
230 V AC
230 V AC
400 V AC
EN 60 947-2 (IEC 60 947-2)
1-pole
2, 3, 4-pole
230 V AC
230 V AC
400 V AC
Rated current
5SX2
In [A]
0.5 - 32
Icn [kA]
6
Icn [kA]
6
Icn [kA]
6
Icu [kA]
10
Icu[kA]
15
Icu [kA]
10
5SX4
40 - 63
0.5 - 6
6
10
6
10
6
10
6
50
10
50
6
50
10
25
- 20
- 32
10
10
10
10
10
10
25
20
30
25
25
20
40
40
- 50
- 125
10
10
10
10
10
10
10
15
15
22
10
15
E DIN VDE 0641 T 12
1-pole
230 V AC
2-pole
400 V AC
E DIN VDE 0641 T 12
1-pole
220 V AC
2-pole
440 V AC
Icn [kA]
4.5
Icn [kA]
4.5
Icn [kA]
10 1)
Icn [kA]
10 1)
5SX7
Rated current
5SX5
In [A]
0.5 - 32
1) Time constant 4 ms.
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Siemens I 2.1 · 2000
i21_01.fm Seite 9 Donnerstag, 6. April 2000 1:04 13
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Selectivity, miniature circuit-breakers/fuses
Generally, distribution networks
are configured as radial networks. An overcurrent device
must be provided at each reduction of the conductor cross
section. This results in a cascade graded according to the
rated current, which should,
where possible, provide selectivity.
Selectivity means, that in the
event of a fault, only the
protective device in the vicinity
of the fault trips. Thus, parallel
current paths can continue to
provide the necessary power.
For MCBs with upstream fuses,
the selectivity limit essentially
depends on the current limits
and tripping characteristics of
the MCB as well as on the
pre-arcing I2t value of the fuse.
Therefore, MCBs with different
characteristics and rated
breaking capacities also have
different selectivity limits. The
subsequent tables show the
currents up to which selectivity
is provided between MCBs and
upstream fuses according to
DIN VDE 0636 Part 21. The
values specified in kA are limit
values which have been determined under unfavourable test
conditions. In practice, better
values can be obtained, depending on the type of the
upstream fuse.
Limit values of the MCBs/fuses selectivity
in kA
Downstream MCBs
Upstream fuses
In [A]
16 A
20 A
25 A
35 A
50 A
63 A
80 A
100 A
≤2
3
4
6
10
16
0.4
0.3
0.3
0.2
-
0.7
0.6
0.6
0.4
0.4
-
2.0
1.6
0.9
0.8
0.6
0.5
•
2.0
1.6
1.2
1.1
1.0
•
•
•
3.0
2.2
2.0
•
•
•
3.2
3.0
2.6
•
•
•
•
•
4.5
•
•
•
•
•
•
20
25
32
40
-
-
-
1.0
-
2.0
1.5
1.2
-
2.4
2.0
1.8
1.7
4.1
3.7
3.0
2.5
•
•
5.0
4.0
6
10
13
0.3
-
0.4
0.4
-
0.7
0.6
0.5
1.2
1.0
1.0
3.0
2.2
2.2
3.2
3.0
3.0
•
5.0
5.0
•
•
•
16
20
25
-
-
-
1.0
-
2.0
2.0
-
2.4
2.4
2.0
1.7
-
4.0
4.0
3.5
2.9
2.0
-
•
•
•
•
4.0
4.0
0.3
0.3
0.3
-
0.5
0.4
0.4
0.4
-
1.2
0.8
0.6
0.6
0.5
0.5
1.7
1.4
1.1
1.0
0.9
0.9
•
4.0
3.0
2.4
1.4
1.4
•
5.0
4.0
3.2
2.6
2.1
•
•
•
•
3.1
3.1
•
•
•
•
•
•
25
32
40
-
-
-
0.8
0.8
-
1.3
1.3
1.3
-
2.0
2.0
2.0
2.0
-
3.0
3.0
2.7
2.4
2.2
-
•
•
•
5.0
4.0
3.5
50
63
-
-
-
-
-
-
-
3.0
3.0
≤2
3
4
0.3
0.3
-
0.4
0.4
0.4
-
0.7
0.7
0.6
0.5
-
1.3
1.2
1.0
0.9
0.7
-
3.0
3.0
2.5
2.0
1.4
1.4
•
•
4.0
3.0
2.0
2.0
•
•
•
•
3.1
3.1
•
•
•
•
•
•
-
-
-
-
-
1.7
1.7
-
3.0
3.0
2.4
-
•
•
5.0
5.0
4.0
-
5SX2
Characteristic A
Characteristic B
32
40
50
Characteristic C
≤2
3
4
6
8
10
13
16
20
Characteristic D
6
8
10
13
16
20
25
32
40
50
• r ≥ Rated breaking capacity 5SX2 according to EN 60 898
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6 000 .
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i21_01.fm Seite 10 Donnerstag, 6. April 2000 1:04 13
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Selectivity MCBs/fuses
In the event of a short circuit
when using the MCBs 5SX4,
5SX7 and fuses according to
DIN VDE 0636 Part 21
selectivity is provided up to the
indicated values in kA.
Limit values of the MCBs/fuses
selectivity in kA
Downstream MCBs
Upstream fuses
In [A]
16 A
20 A
25 A
35 A
50 A
63 A
80 A
100 A
125 A
6
10
13
0.3
-
0.4
0.4
-
0.8
0.7
0.7
1.4
1.2
1.2
3.2
2.5
2.5
4.5
3.5
3.5
9.0
5.0
5.0
•
•
•
•
•
•
16
20
25
-
-
-
1.0
1.0
-
2.0
2.0
1.7
2.8
2.6
2.2
4.2
4.2
3.7
9.0
9.0
7.0
•
•
•
32
40
50
-
-
-
-
1.7
-
2.2
1.6
-
3.7
2.2
2.2
7.0
4.0
4.0
•
6.0
6.0
0.3
0.3
0.3
0.5
0.4
0.4
1.5
1.1
0.9
2.0
1.6
1.4
9.0
5.0
3.5
•
6.0
5.0
•
•
9.0
•
•
•
•
•
•
-
0.4
-
0.8
0.6
0.5
-
1.4
1.2
1.2
1.0
1.0
-
2.7
2.2
2.0
1.6
1.5
1.3
4.5
3.5
3.0
2.4
2.2
2.2
6.0
5.0
4.2
3.4
3.0
3.0
•
7.0
7.0
6.0
6.0
6.0
•
•
•
•
•
•
-
-
-
-
-
2.2
-
2.9
2.4
2.0
-
5.0
4.0
3.5
3.0
9.0
7.0
4.0
4.0
5SX4
Characteristic B
Characteristic C
≤2
3
4
6
8
10
13
16
20
25
32
40
50
• r ≥ Rated breaking capacity 5SX4 according to EN 60 898 10 000 .
Limit values of the MCBs/fuses
selectivity in kA
Downstream MCB
Upstream fuse
In [A]
100 A
125 A
160 A
200 A
224 A
250 A
4.2
3.8
3.4
3.7
3.3
3.0
5.7
5.2
4.7
5.2
4.5
4.1
7.5
7.0
6.5
7.4
6.3
5.6
•
•
9.5
•
•
9.1
•
•
•
•
•
•
•
•
•
•
•
•
40
50
63
2.5
3.2
2.9
2.6
3.5
3.3
4.5
4.0
3.5
5.1
4.5
4.5
6.2
5.7
5.2
7.5
6.5
6.5
9.0
8.7
8.1
9.2
8.0
8.0
•
•
•
•
•
•
•
•
•
80
100
2.3
-
3.3
2.8
4.6
4.3
6.9
6.2
8.1
7.5
•
9.2
5SX7
Characteristic B
40
50
63
Characteristic C
40
50
63
80
100
125
Characteristic D
• r ≥ Rated breaking capacity 5SX7 according to EN 60 898 10 000 .
2/10
Siemens I 2.1 · 2000
i21_01.fm Seite 11 Donnerstag, 6. April 2000 1:04 13
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Selectivity MCBs/circuit-breakers
Distribution networks can also
be configured without any
fuses. In these cases, a
circuit-breaker acts like an
upstream protective device.
In this case, the selectivity limit
depends on the level of the
peak current Î of the miniature
circuit breaker and on the tripping current of the circuit-breaker.
The following tables specify the
short-circuit currents in kA up to
which selectivity is provided
between the MCBs and
upstream circuit-breakers
according to IEC 60 947-2
and DIN VDE 0660, Part 101
at 230/400 V AC .
Limit values of the MCBs/circuit-breakers
selectivity in kA
Downstream MCBs
In [A]
I >[A]
Icn [kA]
Upstream circuit-breakers
3RV1.1
3RV1.2
10
12
8
10
120
144
96
120
50
50
100
100
Selectivity limits [kA] 1)
12.5
150
100
16
192
50
20
240
50
22
264
50
25
300
50
5SX2 ...-5
Characteristic A
2
10
16
6
30
48
6
6
6
0.2
-
0.2
-
-
-
0.2
-
0.2
-
0.6
0.3
0.3
-
1.2
0.5
0.4
-
1.5
0.5
0.5
-
32
40
96
120
6
6
6
10
13
30
50
65
6/10
6/10
6/10
0.2
-
0.2
0.2
-
-
-
0.2
0.2
-
0.2
0.2
0.2
0.3
0.3
0.2
0.5
0.4
0.4
0.5
0.5
0.4
16
20
25
80
100
125
6/10
6/10
6/10
160
200
250
6/10
6/10
6/10
-
-
-
-
-
-
0.2
-
0.4
-
0.4
0.4
-
32
40
50
0.5
1
1.6
5
10
16
6/10
6/10
6/10
0.2
0.2
0.2
0.2
0.2
0.2
0.1
0.1
0.1
0.1
0.1
0.1
0.2
0.2
0.2
0.2
0.2
0.2
0.5
0.5
0.5
0.6
0.6
0.6
0.6
0.6
0.6
2
3
4
20
30
40
6/10
6/10
6/10
6
8
10
60
80
100
6/10
6/10
6/10
0.2
-
0.2
0.2
0.2
0.2
0.2
0.2
0.1
-
0.1
-
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.5
0.3
0.3
0.3
0.2
0.2
0.6
0.4
0.4
0.4
0.4
0.4
0.6
0.5
0.5
0.5
0.4
0.4
13
16
20
130
160
200
6/10
6/10
6/10
-
-
-
-
-
0.2
-
0.2
0.2
-
0.4
0.4
-
0.4
0.4
0.4
25
32
40
250
320
400
6/10
6/10
6/10
50
63
500
630
6/10
6
-
-
-
-
-
-
-
-
-
2
6
10
40
120
200
6
6
6
16
32
40
50
320
640
800
1 000
6
6
6
6
-
-
-
-
0.2
-
0.2
-
0.4
0.3
0.2
-
0.6
0.4
0.4
-
0.6
0.4
0.4
-
5SX2/5SX4 ...-6
Characteristic B
5SX2/5SX4 ...-7
Characteristic C
5SX2 ...-8
Characteristic D
1) In 240/415 V, 50 Hz networks, the selectivity limits must be reduced by 10 %.
I > = Tripping current.
Siemens I 2.1 · 2000
2/11
i21_01.fm Seite 12 Donnerstag, 6. April 2000 1:04 13
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Selectivity MCBs/circuit-breakers
Under short-circuit conditions,
selectivity is provided between
the MCBs and circuit-breakers
in acc. with IEC 60 947-2 and
DIN VDE 0660 Part 101 up to
the specified values in kA.
Limit values of the MCBs/circuit-breakers selectivity in kA
Downstream MCBs
In [A]
I >[A]
Icn [kA]
Upstream circuit-breakers
3RV1.3
16
20
25
32
192
240
300
384
50
50
50
50
Selectivity limits [kA]1)
40
480
50
45
540
50
50
600
50
5SX2...-5
Characteristic A
2
10
16
6
30
48
6
6
6
0.2
0.2
-
0.8
0.4
0.3
1.2
0.5
0.4
2.5
0.6
0.6
3
0.8
0.8
6
1
0.8
6
1.2
1
32
40
96
120
6
6
-
-
-
-
0.6
-
0.8
-
0.8
0.8
6
10
13
30
50
65
6/10
6/10
6/10
0.2
0.2
0.2
0.3
0.3
0.3
0.5
0.4
0.4
0.6
0.6
0.6
0.8
0.8
0.8
1
1
1
1.2
1.2
1
16
20
25
80
100
125
6/10
6/10
6/10
32
40
50
160
200
250
6/10
6/10
6/10
-
0.3
-
0.4
0.4
-
0.6
0.6
0.5
-
0.8
0.8
0.6
0.6
-
1
1
0.8
0.8
-
1
1
0.8
0.8
0.8
-
0.5
1
1.6
5
10
16
6/10
6/10
6/10
0.3
0.3
0.3
0.5
0.5
0.5
0.6
0.6
0.6
1
1
1
1
1
1
1.5
1.5
1.5
3
3
3
2
3
4
20
30
40
6/10
6/10
6/10
6
8
10
60
80
100
6/10
6/10
6/10
0.3
0.2
0.2
0.2
0.2
0.2
0.5
0.3
0.3
0.3
0.2
0.2
0.6
0.4
0.4
0.4
0.4
0.4
1
0.6
0.6
0.6
0.6
0.6
1
0.8
0.8
0.8
0.6
0.6
1.5
1
1
1
0.8
0.8
3
1
1
1
1
1
13
16
20
130
160
200
6/10
6/10
6/10
0.2
-
0.2
0.2
-
0.4
0.4
0.4
0.6
0.6
0.6
0.6
0.6
0.6
0.8
0.8
0.8
1
1
1
25
32
40
250
320
400
6/10
6/10
6/10
50
63
500
630
6/10
6
-
-
-
0.5
-
0.6
0.6
-
0.8
0.8
-
0.8
0.8
0.8
-
2
6
10
40
120
200
6
6
6
16
32
40
320
640
800
6
6
6
0.3
0.2
-
0.5
0.3
0.3
-
0.6
0.4
0.4
-
0.8
0.6
0.5
0.5
-
1.2
0.8
0.6
0.6
-
1.5
1
0.8
0.6
0.6
-
1.5
1
0.8
0.8
0.6
-
50
1 000
6
-
-
-
-
-
-
-
5SX2/5SX4...-6
Characteristic B
5SX2/5SX4...-7
Characteristic C
5SX2...-8
Characteristic D
1) In 240/415 V, 50 Hz networks, the selectivity limits must be reduced by 10 %.
I > = Tripping current.
2/12
Siemens I 2.1 · 2000
i21_01.fm Seite 13 Donnerstag, 6. April 2000 1:04 13
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Selectivity MCBs/circuit-breakers
Under short-circuit conditions,
selectivity is provided between
the MCBs and circuit-breakers
in acc. with IEC 60 947-2 and
DIN VDE 0660 Part 101 up to
the specified values in kA.
Limit values of the MCBs/circuit-breakers
selectivity in kA
Downstream MCBs
Upstream circuit-breakers
3RV1.4
16
In [A]
I >[A]
Icn [kA]
192
100
20
25
32
40
50
63
75
90
100
240
100
300
100
384
100
480
100
600
100
756
100
900
100
1 080
100
1 140
100
Selectivity limits [kA]1)
5SX2...-5
Characteristic A
2
10
16
6
30
48
6
6
6
0.5
0.3
-
0.8
0.4
0.3
-
1.5
0.5
0.5
-
2.5
0.6
0.6
-
3
0.8
0.6
0.6
-
6
1.2
1
0.8
0.8
6
1.5
1.5
1.5
1.2
6
2.5
2
2
1.5
6
3
3
2.5
2
6
4
3
3
2
32
40
96
120
6
6
6
10
13
30
50
65
6/10
6/10
6/10
6/10
6/10
6/10
0.2
0.2
0.2
-
0.4
0.3
0.3
0.3
-
0.5
0.5
0.5
0.5
0.5
-
0.6
0.6
0.6
0.6
0.6
0.5
0.8
0.8
0.8
0.8
0.8
0.8
1.2
1
1
1
1
0.8
2
1.5
1.5
1.5
1.5
1.5
3
2.5
2
2
2
2
6
4
3
3
3
3
6
4
3
3
3
3
16
20
25
80
100
125
32
40
50
160
200
250
6/10
6/10
6/10
-
-
-
-
0.6
0.6
-
0.8
0.8
-
1.5
1.2
1.2
2
1.5
1.5
3
2.5
2.5
3
2.5
2.5
0.5
1
1.6
5
10
16
6/10
6/10
6/10
2
3
4
20
30
40
6/10
6/10
6/10
0.4
0.4
0.4
0.4
0.2
0.2
0.6
0.6
0.6
0.6
0.3
0.3
0.8
0.8
0.8
0.8
0.5
0.5
0.8
0.8
0.8
0.8
0.6
0.6
1
1
1
1
0.8
0.8
3
3
3
3
1
1
6/10
6/10
6/10
6/10
2
2
6/10
6/10
6/10
6/10
2.5
2.5
6/10
6/10
6/10
6/10
5
5
6/10
6/10
6/10
6/10
5
5
6
8
10
60
80
100
6/10
6/10
6/10
13
16
20
130
160
200
6/10
6/10
6/10
0.2
0.2
0.2
0.2
-
0.3
0.3
0.3
0.3
0.3
-
0.5
0.4
0.4
0.4
0.4
0.4
0.6
0.6
0.6
0.6
0.6
0.6
0.8
0.6
0.6
0.6
0.6
0.6
1
1
1
1
1
1
2
1.5
1.5
1.5
1.5
1.5
2.5
2
2
2
2
2
5
3
3
3
3
3
5
3
3
3
3
3
25
32
40
250
320
400
6/10
6/10
6/10
-
-
-
0.5
-
0.6
0.6
-
0.8
0.8
0.6
1.2
1.2
1
1.5
1.5
1.5
2.5
2.5
2
2.5
2.5
2
50
63
500
630
6/10
6
-
-
-
-
-
-
1
-
1.2
-
1.5
1.5
2
1.5
2
6
10
40
120
200
6
6
6
0.4
0.2
-
0.5
0.3
0.3
0.6
0.4
0.4
0.8
0.6
0.5
1
0.6
0.6
1.5
1
0.8
3
1.5
1.5
4
2.5
2
6
3
3
6
3
3
16
32
40
320
640
800
6
6
6
50
1 000
6
-
-
-
0.5
-
0.6
-
0.8
0.6
-
1.2
1
1
1
1.5
1.5
1.2
1.2
2.5
2
1.5
1.5
2.5
2
1.5
1.5
63
80
100
1 200
1 600
2 000
6/10
6/10
6/10
-
-
-
-
-
-
-
-
1.5
-
1.5
1.2
-
63
80
100
1 200
1 600
2 000
6/10
6/10
6/10
-
-
-
-
-
-
-
-
1.2
-
1.2
-
5SX2/5SX4...-6
Characteristic B
5SX2/5SX4...-7
Characteristic C
5SX2...-8
Characteristic D
5SX7...-7
Characteristic C
5SX7...-8
Characteristic D
1) In 240/415 V, 50 Hz networks, the selectivity limits must be reduced by 10 %.
I > = Tripping current.
Siemens I 2.1 · 2000
2/13
i21_01.fm Seite 14 Donnerstag, 6. April 2000 1:04 13
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Selectivity MCBs/circuit-breakers
Under short-circuit conditions,
selectivity is provided between
the MCBs and circuit-breakers
in acc. with IEC 60 947-2 and
DIN VDE 0660 Part 101 up to
the specified values in kA.
Limit values of the MCBs/circuit-breakers
selectivity in kA
Downstream MCBs
Upstream circuit-breakers
In [A]
I >[A]
Icn
[kA]
3VF3
Adjustable
50
63
500
630
40/70/ 40/70/
100
100
80
800
40/70/
100
100
1 000
40/70/
100
125
1 250
40/70/
100
120
1 600
40/70/
100
3VF3
Fixed setting
50
63
400
500
40/70/ 40/70/
100
100
80
630
40/70/
100
100
800
40/70/
100
125
1 000
40/70/
100
160
1 280
40/70/
100
Selectivity limits [kA]1)
5SX2/5SX4
Characteristic A
Characteristic B
Characteristic C
2
10
16
6
30
48
6
6
6
32
40
96
120
6
6
6
10
13
30 6/10
50 6/10
65 6/10
16
20
25
80 6/10
100 6/10
125 6/10
32
40
50
160 6/10
200 6/10
250 6/10
6
1.6
1.4
1.2
1
2.1
1.8
1.6
6
4.7
4.7
3.6
2.5
6/10
6/6.6
5.1
6
6
6
4.6
3.1
6/10
6/10
8.2
6
6
6
6
6
6/10
6/10
6/10
6
6
6
6
6
6/10
6/10
6/10
6
6
6
6
6
6/10
6/10
6/10
6
2.5
2.3
1.8
1.5
3.2
2.5
2.3
6
4
3.7
3
2
6/10
6/6.2
4.6
6
4
3.7
3
2
6/9.7
4.8
3.8
6
4.5
4.4
3.5
2.4
6/10
6/6.2
4.6
6
4.9
5
3.7
2.7
6/10
6/6.5
5.1
6
6
6
6
3.2
6/10
6/10
6/8.9
1.6
1.6
1.4
1.4
1.3
-
5.1
5.1
3.5
3.5
2.4
2.4
8.2
8.2
4.6
4.6
2.8
2.8
6/10
6/10
5.5
5.5
3.3
3.3
6/10
6/10
6
6
4.5
4.3
6/10
6/10
6/10
6/10
6.7
5.8
2.3
2.3
2.1
2.1
1.8
-
4.6
4.6
3.4
3.4
2.3
2.3
3.8
3.8
3
3
2.2
2.2
4.6
4.6
3.4
3.4
2.4
2.4
5.1
5.1
3.7
3.7
2.7
2.7
6/8.9
6/8.9
5.2
5.2
3.6
3.6
6/10
6/10
6/10
6/10
1.9
1.9
6/10
6/10
6/10
6/10
6/9.5
6/9.5
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
2.5
2.5
6/10
6/10
6/10
6/10
6/8.2
6/8.2
6/10
6/10
6/10
6/10
6/6.3
6/6.3
6/10
6/10
6/10
6/10
6/8.2
6/8.2
6/10
6/10
6/10
6/10
6/8.6
6/8.6
6/10
6/10
6/10
6/10
6/10
6/10
6/9.5
4.2
4.2
4.2
4.2
4.2
6/10
6/7.9
6/7.9
5.5
5.5
5.5
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
2.5
2.3
2.3
2.1
2.1
2.1
6/8.2
3.7
3.7
3.7
3.7
3.7
6/6.3
3.8
3.8
3.8
3.8
3.8
6/8.2
3.8
3.8
3.8
3.8
3.8
6/8.6
4.6
4.6
4.4
4.4
4.4
6/10
6/9.4
6/9.4
6/7.5
6/7.5
6/7.5
0.5
1
1.5
5 6/10
10 6/10
15 6/10
2
3
4
20 6/10
30 6/10
40 6/10
6
8
10
60 6/10
80 6/10
100 6/10
13
16
20
130 6/10
160 6/10
200 6/10
1.9
1.7
1.7
1.5
1.5
1.5
25
32
40
250 6/10
320 6/10
400 6/10
1.1
1.1
0.9
3.4
3.4
2.2
4.5
4.5
2.6
5.4
5.4
2.8
5.7
5.7
3.1
6/8.8
6/8.8
4.8
1.9
1.9
1.4
3
3
2.1
3
3
2.2
3
3
2.2
3.6
3.6
2.3
4.9
4.9
2.9
50
500 6/10
2
6
10
40
120
200
6
6
6
2.4
1.4
1.3
2.1
6
4.2
3.9
2.5
6
4.8
5.5
2.8
6
6
6
3.1
6
6
6
4.8
6
6
6
4.2
2.3
1.9
6
4.1
3.7
2.1
6
4.2
3.7
2.1
6
4.2
3.7
2.2
6
4.3
4
2.9
6
6
6
16
32
40
320
640
800
6
6
6
50
1 000
6
1.1
-
3.5
-
4.2
3.3
-
4.9
3.9
3.1
-
6
4.2
3.3
2.9
6
6
4.9
4.8
1.7
-
3.3
-
3.7
-
3.3
2.4
-
3.5
2.7
1.5
-
4.7
3.7
3
2.6
Characteristic C
63
80
100
630
800
1 000
10
10
10
-
-
1.2
-
1.5
1.5
-
2
1.5
1.5
3
2.5
2
-
-
-
1
-
1.2
1.2
-
1.5
1.5
1.5
Characteristic D
63
80
100
1 200
1 600
1 200
10
10
10
-
-
-
-
-
2.5
-
-
-
-
-
-
-
Characteristic D
5SX7
1) In 240/415 V, 50 Hz networks, the selectivity limits must be reduced by 10 %.
The selectivity limits are valid for adjustable releases for the maximum value, In = rated current.
I > = Tripping current.
2/14
Siemens I 2.1 · 2000
i21_01.fm Seite 15 Donnerstag, 6. April 2000 1:04 13
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Selectivity MCBs/circuit-breakers
Under short-circuit conditions,
selectivity is provided between
the MCBs and circuit-breakers
in acc. with IEC 60 947-2 and
DIN VDE 0660 Part 101 up to
the specified values in kA.
Limit values of the MCBs/circuit-breakers
selectivity in kA
Downstream MCBs
Upstream circuit-breakers
3VF4
125
160
200
250
In [A]
I >[A]
Icn
[kA]
3VF5
200
250
315
400
3VF6
315
400800
1250 1600 2000 2500 2000 2500 3150 4000 3200 15756400
40/70/ 40/70/ 40/70/ 40/70/ 45/70/ 45/70/ 45/70/ 45/70/ 45/70/ 45/70/
100
100
100
100
100
100
100
100
100
100
3VF7
4001250
15000
3VF8
8002500
20000
50/70/ 70/
100
100
3WN1
3156300
378075600
65/80/
100
3WN6
3153200
378048000
65/75
Selectivity limits [kA]1)
5SX2/5SX4
Characteristic A
Characteristic B
Characteristic C
2
10
16
6
30
48
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
32
40
96
120
6
6
6
3.9
6
4.6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
10
13
30 6/10
50 6/10
65 6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
16
20
25
80 6/10
100 6/10
125 6/10
32
40
50
160 6/10
200 6/10
250 6/10
6/10
6/10
6/9.6
6/9.6
6
5.1
6/10
6/10
6/10
6/10
6
5.9
6/10
6/10
6/10
6/10
6
6
6/10
6/10
6/10
6/10
6
6
6/10
6/10
6/10
6/10
6
6
6/10
6/10
6/10
6/10
6
6
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/8
6/8
3.6
3.6
6/9.1
6/9.1
4.8
4.8
6/10
6/10
6/6.5
6/6.2
6/10
6/10
6/6.5
6/6.2
6/10
6/10
6/6.5
6/6.2
6/10
6/10
6/6.5
6/6.3
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6/10
6
6
6
6
6
4.9
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
0.5
1
1.5
5
10
15
6/10
6/10
6/10
2
3
4
20
30
40
6/10
6/10
6/10
6
8
10
60 6/10
80 6/10
100 6/10
13
16
20
130 6/10
160 6/10
200 6/10
25
32
40
250 6/10
320 6/10
400 6/10
50
500 6/10
2
6
10
40
120
200
6
6
6
16
32
40
320
640
800
6
6
6
6
6
6
6
6
4
50
1 000
6
4
4.8
6
6
6
6
6
6
6
6
6
6
6
6
Characteristic C
63
80
100
630
800
1 000
10
10
10
Characteristic D
63
80
100
1 200
1 600
2 000
10
10
10
2.5
1.5
1.5
-
3
2
2
2
-
4
3
3
4
3
-
4
3
3
4
3
2.5
4
3
3
3
2.5
-
4
3
3
4
3
3
4
3
3
4
3
3
6
6
5
6
5
5
10
8
6
8
6
6
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
Characteristic D
5SX7
1) In 240/415 V, 50 Hz networks, the selectivity limits must be reduced by 10 %.
The selectivity limits are valid for adjustable releases for the maximum value, In = rated current.
I > = Tripping current.
Siemens I 2.1 · 2000
2/15
i21_01.fm Seite 16 Donnerstag, 6. April 2000 1:04 13
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Selectivity MCBs/MCBs
In distribution networks without
any fuses, MCBs provide selectivity between themselves within
close limits.
This depends on the peak
current Î of the downstream
MCB and on the tripping current
of the upstream MCB.
The following table specifies the
short-circuit currents in kA up to
which selectivity is provided
between MCBs connected in
series at 230 V AC.
Limit values of the MCBs/MCBs
selectivity in kA
Downstream MCBs
Upstream MCBs
In [A]
I >[A]
Icn
5SX4 7
Characteristic C
20
25
32
200
250
320
[kA] 10
10
10
40
400
10
50
500
10
5SX7 7
5SX7 8
Characteristic C
Characteristic D
63
80
100 63
80
100
630
800
1 000 945
1 200 1 500
10
10
10
10
10
10
Selectivity limits [kA] 1)
5SX2/5SX4
Characteristic B
Characteristic C
2/16
6
10
13
30
50
65
6/10
6/10
6/10
0.2
0.2
0.2
0.2
0.2
0.2
0.3
0.3
0.3
0.5
0.5
0.4
0.5
0.5
0.5
0.5
0.5
0.5
0.8
0.8
0.8
1.5
1.2
1.2
1.5
1.5
1.5
3
3
2
5
4
3
16
20
25
80
100
125
6/10
6/10
6/10
0.2
-
0.2
0.2
-
0.3
0.3
-
0.4
0.4
0.4
0.5
0.5
0.4
0.5
0.5
0.4
0.8
0.8
0.6
1.2
1.2
1.2
1.5
1.5
1.2
2
2
1.5
3
3
3
32
40
50
160
200
250
6/10
6/10
6/10
-
-
-
0.4
-
0.4
0.4
-
0.4
0.4
0.4
0.6
0.6
0.6
1.2
1.2
1
1.2
1.2
1.2
1.5
1.5
1.5
3
2.5
2.5
0.5
1
1.5
5
10
15
6/10
6/10
6/10
2
3
4
20
30
40
6/10
6/10
6/10
0.2
0.2
0.2
0.2
0.2
0.2
0.3
0.3
0.3
0.3
0.2
0.2
0.5
0.5
0.5
0.5
0.3
0.3
0.8
0.8
0.8
0.8
0.5
0.5
0.8
0.8
0.8
0.8
0.5
0.5
0.8
0.8
0.8
0.8
0.5
0.5
1.2
1.2
1.2
1.2
0.8
0.8
4
4
4
4
1.5
1.5
5
5
5
5
1.5
1.5
6/10
6/10
6/10
6/10
3
3
6/10
6/10
6/10
6/10
4
4
6
8
10
60
80
100
6/10
6/10
6/10
13
16
20
130
160
200
6/10
6/10
6/10
0.2
0.2
0.2
0.2
0.2
-
0.2
0.2
0.2
0.2
0.2
0.2
0.3
0.3
0.3
0.3
0.3
0.3
0.5
0.4
0.4
0.4
0.4
0.4
0.5
0.4
0.4
0.4
0.4
0.4
0.5
0.4
0.4
0.4
0.4
0.4
0.8
0.6
0.6
0.6
0.6
0.6
1.5
1.2
1.2
1.2
1.2
1.2
1.5
1.5
1.5
1.2
1.2
1.2
3
2.5
2.5
2
2
2
4
3
3
3
3
3
25
32
40
250
320
400
6/10
6/10
6/10
50
63
500
630
6/10
6
-
-
-
0.3
0.3
-
0.4
0.4
-
0.4
0.4
-
0.6
0.6
-
1
1
0.8
0.8
0.8
1.2
1.2
1
1
-
1.5
1.5
1.5
1.5
1.2
2.5
2.5
2
2
1.5
Siemens I 2.1 · 2000
i21_01.fm Seite 17 Montag, 10. April 2000 2:58 14
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Back-up protection, MCBs/fuses
If the level of the maximum
short-circuit current flowing at
the MCB location is unkown, or
if the specified rated breaking
excessive stressing of the MCB.
Generally, a fuse is used for this
purpose.
capacity is exceeded, an additional protective device must be
connected upstream as backup protection. This prevents
The following table specifies the
short-circuit currents in kA up to
which back-up protection is
guaranteed if fuses are used
acc. to DIN VDE 0636 Part 21.
Limit values of the MCBs/fuses back-up protection
in kA
Downstream MCBs
Upstream fuses
In [A]
50 A
63 A
80 A
100 A
125 A
160 A
No back-up protection required up to 50 kA
50
50
50
50
50
35
50
50
50
50
50
50
50
50
50
50
50
50
50
50
35
35
50
50
35
30
35
35
30
30
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
35
35
35
35
50
50
25
25
30
30
25
25
25
25
25
25
15
15
15
I2-6355a
5SX2/5SX4
Characteristic C
0.3-4
Characteristic B/C
6
Characteristic C
8
Characteristic B/C
10
13
16
20
25
32
40
50
Characteristic C
Siemens I 2.1 · 2000
63
Test circuit data:
Test cycle:
Up = 250 V
cos ϕ = 0.27 to 0.49
0 (60°) - t - 0 (60°), t = 3 min
(2 trips at 60° electrical)
2/17
i21_01.fm Seite 18 Montag, 10. April 2000 2:58 14
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Back-up protection, MCBs/circuit-breakers
If MCBs are used in fuseless
distribution boards, circuitbreakers are to be provided as
back-up protection in accordance with EN 60 947-2 and
DIN VDE 0660 Part 101.
The following table shows the
short-circuit currents in kA up to
which back-up protection is
guaranteed if circuit-breakers
are used.
Limit values of the MCBs/circuit-breakers
back-up protection in kA
Downstream MCBs
Upstream circuit-breakers
In [A]
3VF3
Adjustable
50
63
80
100
630
800
1 000
I >[A] 500
Icn [kA] 40/70/ 40/70/ 40/70/ 40/70/
100
100
100
100
Back-up protection up to kA
125
1 250
40/70/
100
1 60
1 600
40/70/
100
3VF3
Fixed setting
50
63
400
500
40/70/ 40/70/
100
100
80
630
40/70/
100
100
800
40/70/
100
125
1 000
40/70/
100
160
1 280
40/70/
100
I2-6356a
5SX2/5SX4
Characteristic A,
Characteristic B,
Characteristic C,
Characteristic D,
0.3-4 6/10
No back-up protection required up to 50 kA
6
8
10
6/10
6/10
6/10
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
13
16
20
6/10
6/10
6/10
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
25
32
40
6/10
6/10
6/10
15
15
10
15
15
10
15
15
10
15
15
10
15
15
10
15
15
10
15
15
10
15
15
10
15
15
10
15
15
10
15
15
10
15
15
10
50
6/10
-
10
10
10
10
10
-
10
10
10
10
10
5SQ2
Characteristic B,
Characteristic C
2/18
0.5-2
3
4
3
3
3
6
4.5
4.5
4.5
4.5
4.5
6
8
10
3
3
3
4
4
4.5
4.5
4
4
4
13
16
20
3
3
3
3
3
3
4.5
4.5
4.5
4.5
4.5
4.5
4
4
4
4
4
4
4.5
4.5
4.5
4.5
4.5
4.5
4
4
4
4
4
4
25
32
40
50
63
3
3
-
4
4
-
4
4
4.5
4.5
4.5
4.5
4
4
Siemens I 2.1 · 2000
i21_01.fm Seite 19 Montag, 10. April 2000 2:58 14
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Back-up protection, MCBs/circuit-breakers
When a short circuit develops,
back-up protection is provided
between the downstream MCB
and the upstream circuit-breakers up to the values specified in
kA.
Limit value of the MCBs/circuit-breakers
back-up protection in kA
Downstream MCBs
Upstream circuit-breakers
3VF4
125
160
200
1 250
1 600
Icn [kA] 40/70/
100
40/70/
100
In [A]
I >[A]
3VF7
4001 250
15 000
3WN1/
3WS1
3156 300
3 78075 600
70/100 65-100
250
3VF5
200
250
315
400
2 000
2 500
2 000
2 500
3 150
4 000
40/70/
100
40/70/
100
45/70/
100
45/70/
100
45/70/
100
45/70/
100
3VF6
315630
3 2006 300
45/70/
100
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
50/70/
100
3VF8
16002 000
20 000
Back-up protection up to [kA]
5SX2/5SX4
Characteristic A,
Characteristic B,
Characteristic C,
Characteristic D
0.3 - 4 6/10
6
8
10
6/10
6/10
6/10
13
16
20
6/10
6/10
6/10
25
32
40
50
No back-up protection required up to 50 kA
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
6/10
6/10
6/10
15
15
15
15
15
8
15
15
15
15
15
8
15
15
15
15
15
8
15
15
15
15
15
8
15
15
15
15
15
8
15
15
15
15
15
8
15
15
15
15
15
8
15
15
15
15
15
8
15
15
15
15
15
8
15
15
15
15
15
8
15
15
15
15
15
8
15
15
15
15
15
8
6/10
8
8
8
8
8
8
8
8
8
8
8
8
0.5 - 2
3
4
3
3
3
6
8
10
3
3
3
6
4
4
3
3
3
13
16
20
3
3
3
25
32
40
3
3
3
3
3
3
3
3
3
50
63
3
3
3
3
5SQ2
Characteristic B,
Characteristic C
Siemens I 2.1 · 2000
2/19
i21_01.fm Seite 20 Montag, 10. April 2000 2:58 14
Miniature Circuit-Breakers (MCBs)
General Data
Description
e
Data is per phase (with load In)
Internal resistances and power losses
In [A]
Type A
R1
mΩ
Pv
W
1 400
540
380
170
120
43
18
10
Type B
R1
Type C
R1
mΩ
Pv
W
1.4
1.4
1.5
1.5
-
-
1.9
1.5
1.8
2.5
39
16.5
11.5
8.5
1.4
1.65
1.94
1.17
3
2.9
3.6
4.2
-
6.5
4.8
4
2.7
2
2
1.7
1.4
Type D
R1
mΩ
Pv
W
0.95
0.75
0.64
0.80
0.85
0.74
3 000
650
270
165
77
0.75
0.65
0.7
0.66
0.7
53
30
15
12.5
9
7.8
0.85
1.10
0.96
1.25
1.52
2
60
20
14
12
10
7
2.6
3
4.1
4.3
5
-
6
4.5
3.7
2.5
1.9
1.6
2.4
2.8
3.8
4
4.7
6.6
5.6
4.5
2.9
2.4
1.8
-
2.2
2.8
3
3.8
4.5
-
3.2
4.2
5.5
1.5
1.8
1.3
2.4
4.5
5.2
1.5
1.8
1.3
2.4
4.5
5.2
-
0.9
5.8
0.88 8
0.7 10.9
0.9
0.8
5.8
8
-
mΩ
Pv
W
5SX2, 5SX4, 5SX5
0.5
1
1.6
2
3
4
6
8
10
13
16
7.5
4.7
3.1
2.6
-
20
25
32
40
50
63
10 500
3 000
640
312
212
82
1
0.7
0.9
1.2
1.7
1.8
5SX7
40
50
63
-
-
80
100
125
-
-
-
-
5SQ2
0.5
1
-
1.6
2
3
-
4
6
8
8 000
1 850
2
1.85
-
631
690
260
170
68
42.5
1.62
2.76
2.34
2.72
2.45
2.72
-
77
2.8
20
25
32
-
16.2
10.3
8
5.9
5.2
3.9
1.6
1.7
2.1
2.3
3.2
4
13.5
8.1
6.8
5.5
4.6
2.6
1.95
1.37
1.74
2.2
2.87
2.66
-
40
50
63
-
3.1
4.96
2.3
1.8
1.5
3.68
4.5
5.95
-
10
13
16
Correction factors for power losses
• DC and AC up to
• AC
2/20
60 Hz x 1.0
200 Hz x 1.1
400 Hz x 1.15
1 100 Hz x 1.3
Siemens I 2.1 · 2000
i21_01.fm Seite 21 Montag, 10. April 2000 2:58 14
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Personnel protection using MCBs
According to DIN VDE 0100
Part 410, to provide protection
against hazardous shock currents in TN supply networks, the
dimensioning of the cross sections of conductors and/or their
lengths after the protective
disconnection within the specified times of 0.4 s or 5 s.
device must ensure that a fault
with negligible impedance (i.e.
a short circuit) at an arbitrary
position between an external
and a protective conductor or a
connected exposed conductive
part causes an automatic
This requirement is met by the
following condition:
Z s x Ia ≤ U o
r Impedance of the entire
fault loop circuit
Ia r Current, which causes
the disconnection within
the specified times
Uo r Voltage to ground
Zs
Maximum permissible impedance Z, of the fault loop at Uo = 230 V AC
to comply with the disconnection condition according to DIN VDE 0100 Part 410.
In [A]
Characteristic A
Characteristic B
Characteristic C
Characteristic D
ta ≤ 0.4 s
≤5s
ta ≤ 0.4 s
≤5s
ta ≤ 5 s
≤5s
ta ≤ 0.4 s
≤5s
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
0.3
0.5
1.0
76.6
76.6
-
-
76.6
46
23
153
92
46
15.3
92
46
1.6
2
3
47.9
38.3
25.5
47.9
38.3
25.5
-
-
14.4
11.5
7.7
28.8
23
15.4
9.6
7.6
5.1
28.8
23
15.4
4
6
8
19.1
12.7
-
19.1
12.7
-
7.6
-
7.6
-
5.8
3.8
2.8
11.6
7.6
5.7
3.8
2.5
1.9
11.6
7.6
5.7
10
13
16
20
25
32
7.6
4.7
3.8
3.0
2.4
7.6
4.7
3.8
3.0
2.4
4.6
2.9
2.3
1.8
1.4
4.6
3.57
2.9
2.3
1.8
1.4
2.3
1.7
1.4
1.1
0.9
0.7
4.6
3.4
2.8
2.2
1.8
1.4
1.1
0.9
0.7
0.5
0.4
0.3
4.6
3.4
2.8
2.2
1.8
1.4
40
50
1.9
-
1.9
-
1.1
0.9
1.1
0.9
0.6
0.5
1.2
1.0
0.28
0.23
1.2
1.0
63
80
100
-
-
0.7
-
0.7
-
0.4
0.3
0.2
0.8
0.6
0.4
0.2
0.14
0.1
0.8
0.6
0.4
125
-
-
-
-
0.16
0.3
0.1
0.3
5SX, 5SQ
For Uo = 240 V AC , Zs x 1.04.
For Uo = 127 V AC , Zs x 0.55.
Siemens I 2.1 · 2000
2/21
i21_01.fm Seite 22 Montag, 10. April 2000 2:58 14
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Protecting luminaire circuits
Maximum permissible lamp
load for a 5SQ3, 5SX2, 5SX4,
5SX5 miniature circuit-breaker
when feeding fluorescent lamps
L 18 W, L 36 W, L 38 W, L 58 W.
Max. number of fluorescent lamps
In [A]
Lamp
Characteristic
Conventional
control gear
Single lamp
uncomp. Parallel
comp.
Electronic control gear
all
B
Group circuit
Single lamp Two lamps
Two lamps
D
all
all
10
L 18 W
L 36 W
L 38 W
L 58 W
27
23
23
14
33
33
33
21
25
25
25
17
51
51
51
35
100
58
55
38
34
34
34
16
70
60
58
32
116
60
58
38
100
58
55
38
116
60
58
38
13
L 18 W
L 36 W
L 38 W
L 58 W
35
30
30
19
43
43
43
27
33
33
33
22
66
66
66
45
130
76
72
50
44
44
44
20
90
78
76
42
152
78
76
50
130
76
72
50
152
78
76
50
16
L 18 W
L 36 W
L 38 W
L 58 W
43
37
37
23
53
53
53
34
41
41
41
28
82
82
82
56
160
94
88
61
56
56
56
26
112
96
94
52
188
96
94
62
160
94
88
61
188
96
94
62
20
L 18 W
L 36 W
L 38 W
L 58 W
25
L 18 W
L 36 W
L 38 W
L 58 W
32
L 18 W
L 36 W
L 38 W
L 58 W
54
46
46
29
67
58
58
37
86
74
74
47
66
66
66
42
83
83
83
53
106
106
106
68
51
51
51
35
64
64
64
43
82
82
82
56
102
102
102
70
128
128
128
87
164
164
164
112
200
117
111
76
250
147
138
96
320
188
177
123
70
70
70
32
86
86
86
40
112
112
112
52
140
120
116
66
174
150
146
82
224
192
188
106
234
120
116
78
294
150
146
98
376
192
188
124
200
117
111
76
250
147
138
96
320
188
177
123
234
120
116
78
294
150
146
98
376
192
188
124
Comment:
MCB design:
Circuit impedance:
DC operation:
all
Full circuit
Single lamp
C
D
B
C
The specified lamp load values are valid for single-pole MCBs. When using multipole
MCBs, the permissible number of lamps is reduced by 20 %.
The specified lamp load values are valid, taking into account a cable impedance of
800 mΩ.
For 400 mΩ the permissible values are reduced by 10 %, for 200 mΩ by 20 %.
The values in the table are also valid for DC operation for 5SX5 MCBs in conjunction with
electronic control gear.
Maximum number of low-voltage halogen lamps 12 V
In [A]
Lamp 20 W
transf. 5NZ5 071
5NZ5 081
Lamp 50 W
5NZ5 072
5NZ5 081
5SX2, 5SX4
Characteristic B
Characteristic C
6
10
16
14
23
38
42
70
112
12
20
32
21
35
57
20
25
32
40
50
6
10
16
47
59
76
95
102
28
47
76
141
176
225
282
302
54
90
145
40
50
65
81
87
23
38
61
71
89
114
142
153
25
41
66
20
25
32
40
50
95
119
153
191
239
181
227
290
363
454
76
96
123
153
192
83
104
133
166
208
.
Reduction factors for MCBs for a simultaneous switch-on of an incandescent lamp load
referred to the rated current of the MCB and the total operating current of the lamps
Reduction factor
Switching using MCBs
Switching using a separate switch
Characteristic A
0.3
0.35
Characteristic B
Characteristic C
0.5
1
0.6
1
Characteristic D
1
1
5SQ3, 5SX2, 5SX4, 5SX5
2/22
Siemens I 2.1 · 2000
i21_01.fm Seite 23 Montag, 10. April 2000 2:58 14
Miniature Circuit-Breakers (MCBs)
General Data
Description
Load capacity of MCBs with
compensated and non-compensated
HQ, HQI and NAV lamps (Number)
Lamp rating [W]
Lamp current
Comp. lamp current
Inrush
35
70
150
250
400
1 000
2 000
3 500
[A]
[A]
[A]
0.5
0.3
10
1
0.5
18
1.8
1
36
3
1.5
60
3.5
2
70
9.5
6
120
10.3
5.5
125
18
9.8
220
In [A]
Lamp rating [W]
150
250
400
1 000
2 000
3 500
35
70
5SQ3, 5SX2, 5SX4
Characteristic B
Characteristic C
Characteristic D
6
10
13
16
20
25
3
5
6
8
10
13
1
2
3
4
5
7
0
1
1
2
2
3
0
0
1
1
1
2
0
0
1
1
1
1
0
0
0
0
0
1
0
0
0
0
0
1
0
0
0
0
0
0
32
40
50
1
1.6
2
16
20
21
1
1
2
8
11
12
0
1
1
4
5
6
0
0
0
2
3
3
0
0
0
2
3
3
0
0
0
1
1
1
0
0
0
1
1
1
0
0
0
0
1
1
0
0
0
3
4
6
8
10
13
3
4
6
8
10
13
1
2
3
4
5
7
0
1
1
2
2
3
0
0
1
1
1
2
0
0
0
1
1
1
0
0
0
0
0
1
0
0
0
0
0
1
0
0
0
0
0
0
16
20
25
32
40
50
16
20
25
32
40
50
9
11
14
17
22
27
4
5
7
8
11
13
2
3
4
5
6
8
2
2
3
4
5
7
1
1
2
2
3
4
1
1
1
2
3
3
0
0
1
1
1
2
1
1.6
2
1
2
2
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3
4
6
3
5
8
2
2
4
1
1
2
0
1
1
0
0
1
0
0
0
0
0
0
0
0
0
8
10
13
16
20
25
11
14
18
22
28
35
5
7
9
11
14
17
3
4
5
6
7
9
2
2
3
3
4
5
1
2
2
3
4
5
0
0
1
1
1
2
0
0
1
1
1
1
0
0
0
0
0
1
32
40
50
44
56
70
22
28
35
12
15
19
7
9
11
6
8
10
2
3
4
2
3
3
1
1
2
40
50
63
40
50
63
22
26
33
38
53
56
12
15
18
21
29
31
6
7
9
10
14
15
3
4
5
6
8
9
3
3
4
5
7
8
1
2
2
3
4/3
4
1
2
2
3/2
4/3
4
1
1
1
1
2
2
5SX7
Characteristic B
Characteristic C
Characteristic D
80
100
125
40
50
63
76
98
116
79/56
95/70
124/88
42
54
64
44/28
53/35
69/44
21
27
32
22/15
26/19
34/24
12
16
19
13/9
16/11
20/14
11
14
16
11/8
13/10
17/12
6
8/7
9
4/3
5/3
7/4
6/5
8/6
9/8
5/2
6/3
8/4
3
4
5
3/1
3/2
4/2
80
100
125
143/112
186/140
186/175
80/56
103/70
103/87
40/31
51/39
51/48
24/18
31/23
31/29
20/16
26/20
26/25
9/6
11/7
14/9
10/5
12/6
15/8
5/3
7/4
8/5
The different values are valid for compensated/non-compensated lamps.
Siemens I 2.1 · 2000
2/23
i21_01.fm Seite 24 Mittwoch, 19. April 2000 2:52 14
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ Voltage-independent, selective main miniature circuit-breakers (SHU)
According to DIN VDE 0645
Selective main miniature circuitbreakers are essentially based
on the mode of operation of
conventional MCBs and have a
delayed thermal release for
overload protection and an
electromagnetic fast release
with an impact armature for
short-circuit protection.
Further, a selectivity device is
included which identifies
whether the downstream MCB
in the load circuit can handle
the short circuit by itself or not.
For situations where the MCB
cannot handle the short circuit,
the selective main miniature circuit-breaker trips.
Independent of its rated
current, the selective main
miniature circuit-breaker guarantees a selectivity with regard
to the downstream MCBs acc.
to EN 60 898 and DIN VDE 0641
Part 11 up to their rated breaking capacity. 6 000
Further, the selective main
miniature circuit-breaker provides back-up protection up to
25 kA for all downstream MCBs.
In the past, sealed fuses were
generally used at the metering
location to prevent power theft.
As a result of various modes of
operation and therefore
different characteristics only a
limited short-circuit selectivity
can be achieved in a cascade
of upstream fuses and downstream MCBs. This selectivity
depends on the difference of
the particular rated currents. If a
meter fuse was blown due to an
overcurrent or a short circuit,
the power supply company
service department had to be
called-in to replace the sealed
fuse because this could not be
done by a non-specialist.
The selective main miniature circuit-breaker, however, can be
reclosed by non-specialists.
The new selective main miniature circuit-breaker offers the
following advantages for the
system/plant user:
• Improved current limiting by
supporting the downstream
MCB using the selective main
miniature circuit-breaker
• System-compatibility, as, with
the exception of the downstream MCB, the operating
characteristics of other
devices are not influenced
• High and reliable selectivity
between the sub-distribution
and meter panel
• Safe, fast and economical reclosure by non-specialists
• Reclosure is not possible as
long as the cause of the short
circuit has not been removed
• A tariff monitoring function
ensures that power taken from
the line is registered
• Isolator characteristics with
contact position indication
according to EN 60 204.
Application example
Selectivity with regard to downstream MCBs up to the rated
breaking capacity 6 000
3
S
I2-6718b
*
SHU
230 V
MCB
Selectivity with regard to upstream fuses up to 2 000 A
S
I2-6719b
230 V
NH
40gl
*
MCB
B 16
SHU
E 25
3
Tripping characteristic E
Summary of the technical data
1,05 1,2
Selective main circuit-breaker
kA
25
5 when mounted on mounting rails acc. to
DIN EN 50 022
6 when mounting on busbars using an adapter
Size acc. to DIN 43 880
V AC
690
• Degree of pollution
for overvoltage class IV
3
Connection
Individual connection or group connection
using busbars
Terminals
Saddle terminals on both ends
On both ends
70
50
Cross sections
• Stranded, max.
mm2
• Finely stranded, max.
mm2
Minutes
230/400
Rated breaking capacity
Tripping time
V AC
20
10
6
4
2
1
40
20
10
6
4
Seconds
Rated voltage
AI2-6664b
60
40
E
Tripping characteristic
Insulation coordination
• Rated insulation voltage
120
DIN VDE 0645
Standards
2
1
0,6
0,4
0,2
0,1
0,06
0,04
0,02
0,01
2/24
1
1,5 2
4 5 6 8 10 15 20
5 6,25
Multiple of rated current
3
30
Siemens I 2.1 · 2000
i21_01.fm Seite 25 Montag, 10. April 2000 2:58 14
Miniature Circuit-Breakers (MCBs)
General Data
Description
■ DC, AC/DC
In DC networks up to 60 V or
120 V, all MCBs of the N System, are suitable for single-pole
and 2-pole application.
Up to max. 220 V DC
battery voltage
The 5SX5 design is required
for higher voltages. Contrary to
the standard product range,
the 5SX5 are equipped with
+
2 (-)
2 (-)
1 +
1 +
For this reason, the polarity of
the MCB is clearly marked and
must be observed when
connecting the cables and
conductors.
+
- +
additional permanent magnets
in the quenching chamber to
support arc suppression.
single-pole
+ A I2-6357b
+
- +
- +
+
Up to max. 220 V DC
battery voltage (for centergrounded battery, up to max.
440 V DC)
2 (-)
4 (+)
2 (-)
4 (+)
2 (-)
4 (+)
2 (-)
4 (+)
1 +
3 -
1 +
3 -
1 +
3 -
1 +
3 -
single-pole
per L+/L-
+
+ -
+ -
+
Up to max. 440 V DC
battery voltage
A I2-6358a
+
- +
2 (-)
4 (+)
2 (-)
4 (+)
1 +
3 -
1 +
3 -
double-pole
+
+ A I2-6359b
Siemens I 2.1 · 2000
2/25
i21_01.fm Seite 26 Montag, 10. April 2000 2:58 14
Miniature Circuit-Breakers (MCBs)
Power Supply Company Program
Selective Main Miniature Circuit-Breakers (SHU)
5SP3, 25 kA
■ Features
• Un:230/400 V, 50-60 Hz can
be used in supply networks
up to 250/440 V AC
• Standards:
DIN VDE 0645
• Mounting depth: 91 mm
2/26
■ Applications
• As main miniature circuitbreaker in meter panels.
• As group miniature circuitbreaker in distribution boards.
• Characteristic E:
Adapted to the special application conditions encountered
in cascade circuit configurations between fuses and
MCBs.
■ Advantages
• Protects insulated cables
against overcurrents
• Isolates loads
• Power drawn from the supply
is registered
• Non-specialists can reclose
the circuit
• Meets defined selectivity
requirements with respect to
upstream and downstream
overcurrent protective
devides
• Can be screwed to mounting
panels
• Can be clipped onto busbars
using an adapter
• Can be snapped onto mounting rails in accordance with
DIN EN 50 022 using the
mounting plate.
Siemens I 2.1 · 2000