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TBS. Surge protection systems
Order information and technical data
Measurement and control system protection
Product information – measurement and control systems
Selection guide for measurement and control system protection
Lightning barriers
Lightning barriers and lightning arrester
LSA-Plus technology
LFS
UFS
Protection of measurement and control installations
Measurement and control installations are used in numerous applications, for example production firms,
building management, heating systems, alarm installations, and so on.
Coupled-in overvoltages due to lightning and other causes pose a danger
not only to control installations but
also to costly transducers and sensors. A fault in a control system usually leads to lost production and
costly restarting processes.
Measurement and control units usually react more sensitively to surges
than power supply systems. The following factors must be considered
when choosing and installing surge
arresters.
1. Maximum voltage of
the system
The rated voltage and type of voltage (AC/DC) of the protection device
must agree with the system data.
3. Maximum data rate
The maximum bandwidth of FRD
protection devices is around 20 kHz,
and of FLD devices 10 kHz.
5. Do the lines come from outside the building and does the
building have an external lightning protection installation?
If the data lines enter the building
from outside and if the building is
protected by a lightning protection
installation, a basic protection device
must be installed where the data
lines enter the building.
2. Maximum current
FRD devices can only be used up to
a maximum rated current of 0.2 A.
FLD devices can be used up to 1 A.
90
4. Are increased resistances
permitted?
Lightning barriers FRD have an internal 15 ohm series resistor for decoupling. In low-resistance systems
this may cause problems.
Measurement and control installations:
The road to perfect surge protection
Object to be protected
䊳
䊳
䊳
Rated current from 1 A to 16 A
e.g. for power supply systems
Rated current less than 1 A
e.g. for data transmission
or measuring circuits
Alternating voltage?
Multi-core systems
from ten twin-cores
What is the maximum data rate?
<20kHz
<10kHz
YES
Measurement and control installations
Large telecommunication installations
Multi-core data lines
<150 MHz
Is increased resistance
permitted in the power
branch?
(Rated current <200 mA)
NO
YES
NO
Note:
Basic protection
device
VF ...AC
VF ...DC
FLD
FRD
TKS-B
LSA-Plus
Use:
Power supply
EIB, control, etc.
Use:
SPS
Use:
0 (4) – 20 mA
current loop
Use:
Bus
transmission of
EIB, transducers
Use:
Lightning
arrester for
control lines
Use:
Large telecoms
installations,
multi-core data
lines
page 92
page 92
page 94
page 94
page 94
page 96
See the table on page 92 for further suggestions.
91
M&C
system
protection
Lightning barriers OBO VF and VF-FS
Operation and fields of application
Lightning barriers VF and VF-FS are used as precision
protection devices in power supplies for computer
installations, modems, ripple control installations, etc.,
to protect them from surges that may be caused by
atmospheric discharges (storms) or switching operations.
The built-in protection circuit, which is made up of gas
discharge tubes and varistors, is permanently monitored by a temperature cutout. A green LED indicates
that it is ready to operate. If the protection circuit is
overloaded, an integral isolating device isolates the
circuit and the green LED goes out. In the version with
remote signalling, a floating changeover contact also
operates.
1
3
ϑ
V
PE
PE
F
V
2
4
Block diagram of VF
Mounting
VF devices are mounted on a 35 mm top-hat rail inside the distribution box or switchgear cabinet. The
remote signalling circuit is connected by means of a
plug (supplied).
Advantages in use
Mounting on 35 mm top-hat rail
Direct installation in distribution board housing or
switchgear cabinet
Available with remote signalling (VF ...-FS)
Permanent check of the varistors in switchgear with
poor access
Screwless clamp terminals
Easy to install
Y circuit
Safety from transient surges on the phase,
neutral or protective earth wire
92
Please always state the order number when ordering.
TBS_GB_V0_15072002
Features at a glance
VF
Technical data
Lightning barrier VF AC
Nominal voltage
UN
Maximum continuous operating voltage
Uc
LPZ
Requirement class to DIN VDE 0675, Part 6 (Draft 11.89) A1, A2
to IEC 61643-1
Rated load current
Nominal discharge current
Maximum discharge current
Voltage protection level Up
IL
In (8/20)
Imax (8/20)
In Up L-N
Imax Up L-N
Response time
tA
IL
In (8/20)
Imax (8/20)
In Up L-N
Imax Up L-N
Response time
tA
48 V~
60 V~
60 V~
80 V~
2->3
D
class III
≤160 V
≤220 V
700 A
2000 A
≤220 V
≤300 V
110 V~
150 V~
230 V~
255 V~
2000 A
6500 A
≤530 V
≤850 V
2500 A
7000 A
≤1060 V
≤1500 V
16 A
≤360 V
≤480 V
≤ 25 ns
Lightning barrier VF DC
Nominal voltage
UN
Maximum continuous operating voltage
Uc
LPZ
Requirement class to DIN VDE 0675, Part 6 (Draft 11.89) A1, A2
to IEC 61643-1
Rated load current
Nominal discharge current
Maximum discharge current
Voltage protection level Up
24 V~
34 V~
12 V18 V-
24 V36 V-
48 V76 V-
60 V90 V2->3
D
class III
110 V170 V-
≤70 V
≤100 V
16 A
700 A
2000 A
≤130 V
≤240 V
≤280 V
≤170 V
≤300 V
≤350 V
230 V300 V-
2000 A
6500 A
≤500 V ≤820 V
≤800 V ≤1020 V
≤25 ns
Lightning barrier VF AC/DC
Connection cross-section single-stranded,
multi-stranded, fine-stranded with core end sleeve,
pin cable lug, crimp sleeve
Stripping length for connecting cables
Colour
Material
Mounting
Dimensions
0.14-2.5 mm2
6-7 mm
Light grey, similar to RAL 7035
Polyamide 6
Snap-fitting on 35 mm top-hat rail to DIN EN 50022
Width 17.8 mm-depth 55.0 mm
Remote signalling, lightning barrier VF AC/DC-FS
Max. switching voltage
Umax.
Max. switching current
Imax.
Max. switching power
Pmax.
Connection cross-section, flexible or rigid
Signal contact
NO (make)
NC (break)
250 V~, 220 V2A
125 VA, 60 W
0.14-1.5 mm2
1-2
1-3
Other voltages on request. Subject to technical alterations
Ordering data
TBS_GB_V0_15072002
Description
Order no.
VF 24-AC
VF 48-AC
VF 60-AC
VF 110-AC
VF 230-AC
Alternating current
Alternating current
Alternating current
Alternating current
Alternating current
VF 12-DC
VF 24-DC
VF 48-DC
VF 60-DC
VF 110-DC
VF 230-DC
Direct
Direct
Direct
Direct
Direct
Direct
VF 24-AC-FS
VF 230-AC-FS
Alternating current systems; 24 V with FS* 5097 81 9
Alternating current systems; 230 V with FS* 5097 85 1
current
current
current
current
current
current
systems;
systems;
systems;
systems;
systems;
systems;
systems;
systems;
systems;
systems;
systems;
24 V version
48 V version
60 V version
110 V version
230 V version
12 V version
24 V version
48 V version
60 V version
110 V version
230 V version
5097 60 6
5097 61 4
5097 62 2
5097 63 0
5097 64 9
90
Type
62
17.5
5097 45 2
5097 46 0
5097 47 9
5097 48 7
5097 49 5
5097 50 9
* FS = remote signalling
Please always state the order number when ordering.
93
M&C
system
protection
Lightning barriers FRD, FLD and lightning arrester TKS-B
OBO lightning barriers are also suitable for installation
at zone interface 1 to 3.
The two-stage circuit of FRD and FLD devices, consisting of gas discharge tube, varistors and Transzorb
diodes, features high discharge capacity, short
clamping time and a low protection level.
The single-stage protective circuit of TKS-B devices
ensures a very high discharge capacity.
1
3
V
F
PE
L
V
D
PE
V
L
2
4
Block diagram of FLD
Lightning barriers TKS-B, FRD, FLD, FRD 2 and FLD 2
protect electronic measurement and control installations from surges due to atmospheric discharges
(storms) or in the form of travelling waves on data
lines.
Arrester TKS-B is used as a lightning arrester (LPZ
0->2) for data lines of all kinds (max. 110 V, 2 MHz).
Lightning barriers of series FRD and FLD are designed for use in non-earthed (asymmetrical, floating)
two-wire systems. The FRD version can be used in
installations where an increase in resistance is permitted. If the resistance must not be increased, version FLD is used.
Lightning barriers of series FRD 2 and FLD 2 are intended for use in single-wire earth-related systems
(symmetrical, potential-related). Here too, a choice
can be made between series resistance and series
inductance. If the resistance can be increased, version FRD 2 is used, and with a voltage-controlled installation, type FLD 2. With their two-stage design,
Features at a glance
FRD, FLD
1
3
PE
PE
2
4
Block diagram of TKS-B
1
3
R
V
F
PE
V
D
PE
R
D
2
4
Block diagram of FRD 2
Mounting
OBO lightning barriers can be installed in any standard switchgear cabinet or distribution box, simply by
snap-fitting to a 35 mm top-hat rail. Screwless terminals keep installation costs low.
Advantages in use
Mounting on 35 mm top-hat rail
Direct installation in distribution board housing or
switchgear cabinet
Special voltages can be provided for
without difficulty
User-oriented surge protection design is possible
Screwless clamp terminals
Easy to install
Y circuit
Safety from transient surges on the phase,
neutral or protective earth wire
94
Please always state the order number when ordering.
TBS_GB_V0_15072002
Operation and fields of application
Technical data
FRD 5
FLD 5
FRD 2-5
FLD 2-5
Lightning barriers
FRD 12
FLD 12
FRD 2-12
FLD 2-12
FRD 24
FLD 24
FRD 2-24
FLD 2-24
LPZ
FRD 48
FLD 48
FRD 2-48
FLD 2-48
FRD 60
FLD 60
FRD 2-60
FLD 2-60
FRD 110
FLD 110
FRD 2-110
FLD 2-110
1→3
TKS-B
0→2
Nominal voltage
UN
5V
12 V
24 V
48 V
60 V
110 V
110 V
Max. continuous operating voltage
Uc
6V
13.5 V
27 V
53 V
66 V
122 V
130 V
Rated load current FRD, FRD 2, TKS-B
IL
0.2 A
16 A
Rated load current FLD, FLD 2
IL
1.0 A
-
Nominal discharge current (8/20)
In
10 kA
20 kA
Impulse current 10/350
Iimp
-
6 kA
Voltage protection level Up
Up 3-4
Series resistance per path
R
FRD, FRD 2-...
≤13 V
≤29 V
15 Ω
-
Series inductance per path
L
FLD, FLD 2-...
100 µH
-
Connection cross-section
single-stranded, multi-stranded, fine-stranded
with core end sleeve, pin cable lug, crimp sleeve
≤51 V
≤100 V
≤130 V
≤300 V
≤450 V
0.14-2.5 mm2
Stripping length for connecting cables
6-7 mm
Colour
Light grey, similar to RAL 7035
Material
Polyamide 6
Mounting
Snap-fitting on 35 mm top-hat rail to DIN EN 50022
Dimensions
Width 17.8 mm, depth 55.0 mm
Subject to technical alterations
Ordering data
Description
Order no.
5 V version
12 V version
24 V version
48 V version
60 V version
110 V version
5098 49 1
5098 50 5
5098 51 3
5098 52 1
5098 54 8
5098 55 6
FLD 5
FLD 12
FLD 24
FLD 48
FLD 60
FLD 110
5 V version
12 V version
24 V version
48 V version
60 V version
110 V version
5098 59 9
5098 60 2
5098 61 0
5098 62 9
5098 63 7
5098 64 5
FRD 2- 5
FRD 2- 12
FRD 2- 24
FRD 2- 48
FRD 2- 60
FRD 2-110
5 V version
12 V version
24 V version
48 V version
60 V version
110 V version
5098 79 3
5098 71 8
5098 72 6
5098 73 4
5098 74 2
5098 75 0
FLD 2- 5
FLD 2- 12
FLD 2- 24
FLD 2- 48
FLD 2- 60
FLD 2-110
5 V version
12 V version
24 V version
48 V version
60 V version
110 V version
5098 86 6
5098 80 7
5098 81 5
5098 82 3
5098 83 1
5098 85 8
TKS-B
Single-stage basic protection
5097 97 5
TBS_GB_V0_15072002
FRD 5
FRD 12
FRD 24
FRD 48
FRD 60
FRD 110
Please always state the order number when ordering.
90
Type
17.5
62
95
M&C
system
protection
LSA-Plus technology
Operation and fields of application
Mounting
The LSA connection or isolating strips are fixed simply
by snap-fitting to a mounting tray. This means that
they can be mounted on almost any wall.
PTC
GDA
Diodes
Fail--safe
Fail--safe
PTC
Block diagram of LSA-BF...
a1
..
.a10
GDA
b1
..
.b10
a1’
..
.a10’
b1’
..
.b10’
Block diagram of LSA-B-MAG
Using the LSA-Plus tool, the wires can be connected
without cutting, and without solder, screws and stripping.
LSA-Plus features at a glance
Advantages in use
LSA-Plus technology
Simple solderless, screwless connections with no
need to strip the insulation
Compact design
Space-saving protection of multi-wire systems
Fail-safe technology
Protection from thermal overloading
Individual surge protection
The modules allow certain wiring branches to be
protected
Modular design
Allows simple, professional mounting
96
Please always state the order number when ordering.
TBS_GB_V0_15072002
LSA-Plus surge protection from OBO is used especially with multi-wire systems such as those to be
found, for example, in measurement and control engineering and in telephone exchanges. For example,
ten two-wire (TC) systems can be protected with only
one surge protection (basic protection) magazine
LSA-B-MAG. Modules LSA-BF provide one twin-core
protection of two lines.
The basic and precision protection devices of type
LSA-BF 180 (180 V version) are intended for use in
telephone exchanges in analog and ISDN networks.
OBO basic and precision protection devices
LSA-BF-24 (24 V version) are used especially in
computer systems and measurement and control
engineering.
The protection circuit of the LSA-Plus devices consists
of powerful triple-pole gas discharge arresters. Basic
and precision protection are based on fail-safe technology, ensuring that, in the event of a thermal overload, the arrester is bridged and therefore protected.
Technical data
Type
LSA-B-MAG
Protected double lines/wires
LSA-BF-24
10 TC/20
1 TC/2
Max. continuous operating voltage
Uc
180 V
24 V
Voltage protection level
Up
<700 V
<50 V
LPZ
LSA-BF-180
0→2
180 V
<300 V
0→3
Nominal discharge current (8/20)
In
5 kA
2.5 kA
2.5 kA
Max. discharge current (8/20)
Imax
10 kA
5 kA
5 kA
Impulse current (10/350)
Iimp
1 kA
0.5 kA
0.5 kA
Cut-off frequency (-3 dB)
MHz
30 MHz/100-600 Ω
3 MHz/100 Ω
3.5 MHz/600 Ω
Temperature range
ϑ
-20 °C to +60 °C
Storage temperature
-40 °C to +80 °C
Type
LSA-A-LEI
Connection strip for twin cores/wires
10 TC/20
Use with protection component
LSA-B-MAG
Colour
Grey
Dimensions
Height
Width
Depth
31 mm
126 mm
20 mm
Type
LSA-T-LEI
Isolating strip for twin cores/wires
10 TC/20
Use with protection component
LSA-B-MAG; LSA-BF-24; LSA-BF-180
Colour
White
Dimensions
Height
Width
Depth
31 mm
126 mm
20 mm
Type
LSA-E-LEI
Earth wire strip to connect earth wires
34
Colour
Red
Dimensions
Height
Width
Depth
31 mm
126 mm
20 mm
Subject to technical alterations
Ordering data
Type
Description
Order no.
LSA-A-LEI
Connection strip for ten twin-cores
5084 00 8
LSA-T-LEI
Isolating strip for ten twin-cores
5084 01 2
LSA-E-LEI
Earth wire strip, 34-way
5084 01 6
5084 02 0
5084 02 4
5084 02 8
Dimension drawing of LSA-A-LEI; LSA-T-LEI
9
LSA-B-MAG Basic protection magazine, with 20 arresters
LSA-BF-180 Basic and precision protection (1 TC) 180 V
LSA-BF-24 Basic and precision protection (1 TC) 24 V
31
20
126
LSA-E
Earthing bar for LSA modules
5084 03 2
LSA-M
Mounting tray for four connection/isolating strips
5084 03 6
LSA-TOOL
Wiring tool
5084 04 0
39.9
TBS_GB_V0_15072002
Dimension drawing of LSA-BF-180; LSA-BF-24
Please always state the order number when ordering.
99