katalog tbs 2012 en

7/21/2019 Katalog TBS 2012 En

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TBS | Catalogue 2012/2013

Transient and

lightning protection systems

THINK CONNECTED.


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Welcome to Customer Service

Service telephone: +49 (0)2373 89-1500

Telefax for enquiries: +49 (0)2373 89-7777

Fax for orders: +49 (0)2373 89-7755

E-mail: [email protected]

Internet: www.obo-bettermann.com

Use the direct line to OBO Customer Service! We are available on our Service Hotline on +49 (0)2373 891 500from 7.30 a.m. to 5.00 p.m. for any questions to do with the OBO complete product range for electrical installa-tions. The newly structured OBO Customer Service can offer you the full service: Competent contacts from your region All the information on the OBO product range Knowledgeable advice on special application topics Quick, direct access to all the technical data of the OBO products we also want to provide the best in

customer relations!


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Planning aids 5

Surge protection energy technology, arrestor, Type 1 135

Surge protection energy technology, arrestor, Type 1+2 145


Surge protection energy technology, arrestor, Type 2+3 173


Sure protection, photovoltaics 219

Data and information technology 235

Protection and spark gaps 287

Measuring and test systems 291

Equipotential bonding systems 295

Earthing systems 309

Interception and arrestor systems 329

Insulated lightning protection and OBO isConsystem 381

Directories 397

Contents


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OBO TBS seminars: First-handknowledge

With a comprehensive programmeof training courses and seminars

on the subject of surge voltageand lightning protection systems,OBO is able to support its cus-tomers with specialist knowledgefrom a single source. Alongsidethe basic theoretical principles, theprogramme also deals with practi-cal implementation in everyday ap-plications. Special calculation andapplication examples round off thecomprehensive programme ofknowledge transfer.

Invitations to tender, product in-formation and datasheets

We can make life easier for you:With our comprehensive selection

of materials designed for practicalapplications, which provide youwith effective support with theplanning and calculation of aproject. These include: Invitations to tender Product information Information sheets DatasheetsThese documents are continuallyupdated and can be downloadedat no charge at any time from theInternet download area at

www.obo.de.

Invitations to tender on the Inter-net at www.ausschreiben.de

More than 10,000 entries from theKTS, BSS, TBS, LFS, EGS and

UFS ranges can be called up freeof charge. Regular updates andexpansions mean that you alwayshave a comprehensive overview ofthe OBO products. All the currentfile formats PDF, DOC, GAEB,HTML, TEXT, XML, NORM areavailable.www.ausschreiben.de


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Basic principles of surge voltage protection 6

Surge protection energy technology 19

Sure protection, photovoltaics 27

Surge protection device for data and information technology 43

Protection and spark gaps 65

Measuring and test systems 69

Equipotential bonding systems 73

Earthing systems 77

Interception and arrester systems 87

Insulated lightning protection and OBO isConsystem 113

Additional information 126

Contents of planning and mounting aids


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Minor cause, major effect: Damage caused by surge voltages

Our dependency on electrical andelectronic equipment continues toincrease, in both our professionalor private lives. Data networks incompanies or emergency facilitiessuch as hospitals and fire stationsare lifelines for an essential realtime information exchange. Sensi-tive databases, e.g. in banks ormedia publishers, need reliabletransmission paths.

It is not only lightning strikes thatpose a latent threat to these sys-tems. More and more frequently,today's electronic aids are dam-aged by surge voltages caused byremote lightning discharges orswitching operations in large elec-trical systems. During thunder-storms too, high volumes of ener-gy are instantaneously released.These voltage peaks can pene-trate a building though all manner

of conductive connections andcause enormous damage.


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What are the consequences ofdamage caused by surge volt-ages in our daily lives?

The most obvious one is the de-struction of electrical equipment. Inprivate households, these arespecifically: TV/DVD players

Telephone systems Computer systems, stereo sys-

tems Kitchen appliances Monitoring systems Fire alarm systemsThe failure of such equipment cer-tainly incurs great expense. Whathappens when the following sufferoutage times / consequential dam-age: Computers (loss of data) Heating/water heating systems

Lift, garage door and rollershutter drives Triggering or destruction of fire

/ burglar alarm systems (coststhrough a false alarm)?

A vital topic perhaps, particularly inoffice buildings, because: Can work continue in your

company without a centralcomputer / server?

Was all the important databacked up in time?

Growing sums of damage

Current statistics and estimates ofinsurance companies show: Dam-age levels caused by surges ex-cluding consequential or outagecosts long since reached drasticlevels due to the growing depen-dency on electronic "aids". It's no

surprise, then, that property insur-ers are checking more and moreclaims and stipulating the use ofdevices to protect against surges.Information on protection mea-sures is contained, e.g. in DirectiveVDS 2010.


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Creation of lightning discharges

Creation of lightning discharges: 1 = approx. 6,000 m, approx. 30 C, 2 = approx. 15,000 m, approx. 70 C

Discharge types

Some 90% of all lightning dis-charges between a cloud and theground are negative cloud-earthstrikes. The lightning begins in anegatively charged area of thecloud and spreads to the positivelycharged surface of the earth. Addi-tional discharges are divided into: Negative earth-cloud strikes Positive cloud-earth strikes

Positive earth-cloud strikes.The most common discharges ac-tually occur within a cloud or be-tween different clouds.

Creation of lightning discharges

When warm, damp air massesrise, the air humidity condensesand ice crystals are formed atgreat heights. Storm fronts can oc-cur when the clouds expand toheights of up to 15,000 m. Thestrong upwind of up to 100 kilo-metres per hour causes the lightice crystals to enter the higherarea and the sleet particles enter

the lower area. Knocks and frictioncause electrical discharge.


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Negative and positive charges

Studies have proved that the sleetfalling down (area warmer than15 C) has a negative chargeand the ice crystals being thrownupwards (area colder than 15C) has a positive charge. Thelight ice crystals are carried intothe upper areas of the cloud bythe upwind and the sleet falls tothe central areas of the cloud. Thisdivided the clouds into the threeareas: Top: Positively charged zone Centre: Weakly negative

charged zone Bottom: Weakly positive

charged zoneThis separation of charges forms avoltage in the cloud.

Negative and positive charges: 1 = Sleet, 2 = Ice crystals

Load distribution

Typical load distribution: Positive at the top, negative in

the centre and weakly positiveat the bottom.

Positive charges can also befound in the area near theground.

The field strength required totrigger lightning is dependenton the insulating ability of theair and is between 0.5 and 10kV/cm.

Charge distribution: 1 = approx. 6,000 m, 2 = Electrical field


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What are transient surges?

Transient surge voltages: 1 = Voltage drops/brief interruptions, 2 = Harmonic waves through slowand rapid voltage changes, 3 = Temporary voltage increases, 4 = Switching surges, 5 = Lightningsurge voltages, hatched = application for surge protection devices

Transient surge voltages are briefvoltage peaks lasting microsec-onds, which may be a multiple of

the attached mains nominal volt-age.

Direct strike

The largest voltage peaks in thelow-voltage consumer network arecaused by lightning discharges.The high energy content of light-ning surges when a direct strikehits the external lightning protec-tion system or a low-voltage open-wire line usually causes withoutinternal lightning and surge protec-tion total outage of the connect-ed consumers and damage to theinsulation.

Induced voltage peaks andswitching surge voltages

Yet induced voltage peaks inbuilding installations and energy or

data line supply cables can alsoreach many times the nominal op-erating voltage. Switching surgestoo, which in fact do not causesuch high voltage peaks as light-ning discharges but occur muchmore frequently, can result in im-mediate system failure. As a rule,switching surges amount to twiceto three times the operating volt-age, lightning surges on the otherhand can sometimes reach 20times the nominal voltage valueand transport a high energy con-

tent.

Delayed failures

Often, failures occur only after atime delay as the aging process ofelectronic components in the af-

fected devices triggered by small-er transients causes insidiousdamage. A number of differentprotection measures are required.These depend on the exact causeand/or impact point of the light-ning discharge.


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What pulse forms are there?

Pulse types and their characteristics: Yellow = pulse shape 1, direct lightning strike, 10/350 ssimulated lightning pulse, red = pulse shape 2, remote lightning strike or switching operation, 8/20s simulated lightning pulse (Surge)

Testing currents simulate poten-tial increase

High lightning currents can flow tothe ground during a storm. If a

building with external lightning pro-tection receives a direct hit, a volt-age drop occurs on the earthingresistor of the lightning protectionequipotential bonding system,which represents a surge voltageagainst the distant environment.This rise in potential poses a threatto the electrical systems (e.g. volt-age supply, telephone systems,cable TV, control cables, etc.) thatare routed into the building.Suitable test currents for testingdifferent lightning and surge pro-

tectors have been defined in na-tional and international standards.

Direct lightning strike: Pulseshape 1

Lightning currents that can occurduring a direct lightning strike can

be imitated with the surge currentof wave form 10/350 s. The light-ning test current imitates both thefast rise and the high energy con-tent of natural lightning. Lightningcurrent arrestor Type 1 and exter-nal lightning protection compo-nents are tested using this current.

Remote lightning strikes orswitching operations: Pulseshape 2

The surges created by remote

lightning strikes and switching op-erations are imitated with test im-pulse 8/20 s. The energy contentof this impulse is significantly low-er than the lighting test current ofsurge current wave 10/350 s.Surge arrestor Type 2 and Type 3are impacted with this test im-pulse.


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Causes of lightning currents

Direct lightning strike into abuilding

If a lightning strike hits the externallightning protection system orearthed roof structures capable ofcarrying lightning current (e.g. roofaerial), then the lightning energycan be arrested to the ground inadvance. However, a lightning pro-tection system on its own is notenough: Due to its impedance, thebuilding's entire earthing system israised to a high potential. This po-tential increase causes the light-ning current to spilt over the build-ing's earthing system and alsoover the power supply systems

and data cables to the adjacentearthing systems (adjacent build-ing, low-voltage transformer).

Risk:Lightning impulse (10/350)

Direct lightning strike into a low-voltage open-wire line

A direct lightning strike into a low-voltage open wire line or data ca-ble can couple high partial lightingcurrents in an adjacent building.Electrical equipment in buildings atthe end of the low-voltage open-wire line are at particular risk of

damage caused by surges.

Risk:Lightning impulse (10/350)


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Causes of surges

Switching surges in the low-volt-age system

Switching surges are caused byswitch-on and switch-off opera-tions, by switching inductive andcapacitive loads and by interrupt-ing short-circuit currents. Particu-larly when production plants, light-ing systems or transformers areswitched off, electrical equipmentlocated in close proximity can bedamaged.

Risk:Surge impulse (8/20)

Coupling of surges through localor remote lightning strike

Even if lightning protection andsurge protection measures are al-ready installed: A local lightningstrike creates additional high mag-netic fields, which in turn inducehigh voltage peaks in line systems.Inductive or galvanic coupling can

cause damage within a radius ofup to 2 km around the lightningimpact point.

Risk:Surge impulse (8/20)


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Gradual surge reduction with lightning protection zones

Lightning protection zone con-cept

The lightning protection zone con-cept described in internationalstandard IEC 62305-4 (DIN VDE0185 Part 4) has proved to bepractical and efficient. This con-

cept is based on the principle ofgradually reducing surges to asafe level before they reach theterminal device and cause dam-age. In order to achieve this situa-tion, a building's entire energy net-work is split into lightning protec-tion zones (LPZ = Lightning Protec-

tion Zone). Installed at each transi-tion from one zone to another is asurge arrestor for equipotentialbonding. These arrestors corre-spond to the requirement class inquestion.

Lightning protection zone

LPZ 0 A Unprotected zone outside the building. Direct lightning strike, no shielding against electromagnetic interferencepulses LEMP (Lightning Electromagnetic Pulse)

LPZ 0 B Through the area protected by the external lightning protection system. No shielding against LEMP.

LPZ 1 Zone inside the building. Low partial lightning energies possible.LPZ 2 Zone inside the building. Low surges possible.

LPZ 3 Zone inside the building (can also be the metal housing of a consumer). No interference pulses through LEMPor surges present.


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Zone transitions and protective devices

Benefits of the lightning protec-tion zone concept Minimisation of the couplings

into other cable systemsthrough arresting the energy-rich, dangerous lightning cur-rents directly at the point thecables enter the building.

Malfunction prevention withmagnetic fields.

Economic, well-plannable indi-vidual protection concept fornew and old buildings and re-constructions.

Type classes of the surge protec-tion devices

OBO surge protection devices areclassified in accordance with DINEN 61643-11 into three type class-es Type 1, Type 2 and Type 3(previously B, C and D). Thesestandards contain building regula-tions, requirements and tests forsurge arrestors used in AC net-works with nominal voltages of upto 1,000 V and nominal frequen-cies of between 50 and 60 Hz.This classification enables ar-restors to be matched to differentrequirements with regard to loca-tion, protection level and current-

carrying capacity. The table belowprovides an overview of the zonetransitions. It also shows whichOBO surge protectors are to be in-stalled in the energy supply net-work and their respective function.

Correct selection of the arrestor

This classification enables ar-resters to be matched to differentrequirements with regard to loca-tion, protection level and current-carrying capacity. The table belowprovides an overview of the zonetransitions. It also shows whichOBO surge protection devices canbe installed in the energy supplynetwork and their respective func-tion.

Zone transitions

Zonetransition

Protection device and device typeProductexample

Product figure

LPZ 0 BtoLPZ 1

Protection device for lightning protection equipotential bonding in accordance withDIN VDE 0185-3 for direct or close lightning strikes.Devices: Type 1 (Class I, requirements class B), e.g. MC50-BMax. protection level according to standard: 4 kVInstallation e.g. in the main distributor/at building entry

MCDItem no.:5096 87 9

LPZ 1toLPZ 2

Protection device for surge protection to DIN VDE 0100-443 for surge voltages ar-riving through the supply network due to remote strikes or switching operations.Devices: Type 2 (Class II, requirements class C), e.g. V20-CMax. protection level according to standard: 2.5 kVInstallation e.g. in the power distributor, subdistributor

V20Item no.:5094 65 6

LPZ 2toLPZ 3

Protection device, designed for surge protection of portable consumers at socketsand power supplies.Devices: Type 3 (Class III, requirements class D), e.g. FineController FC-DMax. protection level according to standard: 1.5 kVInstallation e.g. on the end consumer

FC-DItem no.:5092 80 0


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BET testing centre for lightning protection, electrical engineering and

support systems

Lightning current test

BET with countless tasks

If only lightning current, environ-mental and electrical testing waspossible at BET up to now, theBET Test Centre is now a compe-tent partner for testing of cablesupport systems. This combinationhas made it necessary to revisethe meaning of the name. If BETpreviously stood for "Blitzschutz-und EMV-Technologiezentrum"

(Lightning protection and EMCtechnology centre), since 2009these letters have meant BET Testcentre for lightning protection,electrical engineering and supportsystems.

Test generator for lightning cur-rent tests

The test generator planned in1994 and completed in 1996makes it possible to carry out light-ning current tests at up to 200 kA.The generator was planned andconstructed in cooperation withthe Soest Technical College. Dueto the intensive planning and sci-entific support in the construction

of the test system, it has workedfor 12 years without errors andmeets current standardised test re-quirements.

Testing tasks

The main load of the testing gener-ator is generated through the test-ing of products from the TBS prod-uct division. For this, developmen-tal tests of new developments,modifications to existing OBOproducts and also comparisontests with competitive products arecarried out. These include lightningprotection components, surge pro-

tection devices and lightning ar-resters. Tests for lightning protec-tion components are carried outaccording to DIN EN 50164-1, forspark gaps according to DIN EN50164-3 and for lightning andsurge protection devices accord-ing to DIN EN 61643-11. This isonly a small amount of the testingstandards used for tests in theBET Test Centre.


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Load test

Testing types for lightning andsurge protection

Both lightning current tests andsurge voltage tests can be carriedout at up to 20 kV. A hybrid gener-ator is used for these tests, whichwas also developed as part of acooperation with the Soest Techni-cal College. EMC testing of cablesupport systems can also be car-ried out using this test generator.

All kinds of cable routing and ca-ble support systems of up to 8mlength can be tested without anydifficulties. Tests for electrical con-ductivity according to DIN EN61537 are also carried out.

Simulation of real environmentalconditions

To carry out standardised tests oncomponents intended for externaluse, they must be pretreated un-der real environmental conditions.This takes place in a salt spraytrough and a sulphur dioxide test-ing chamber. Depending on thetest, the test length and the con-centration of the salt spray or sul-

phur dioxide in the testing cham-bers may vary. This means that itis possible to conduct tests ac-cording to IEC 60068-2-52, ISO7253, ISO 9227 and EN ISO6988.

Testing cable support systems

The well-known KTS testing sys-tem, newly installed in the BETTest Centre, allows the investiga-tion of the load capacities of anycable support system manufac-tured by OBO. The basis for this isDIN EN 61537 and VDE 0639.In the BET Test Centre, OBO Bet-termann has a testing departmentin which products can be tested

according to standards, even dur-ing the development phase.


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Planning aids, surge protection energy technology

Standards, surge protection 20

Installation instructions 21

4-cable networks 22

5-cable networks 23

Selection aid, energy technology 24


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Standards, surge protection

You must take various standardsinto account when erecting surgeprotection. You can find the mostimportant specifications here.

Standard Contents

DIN VDE 0100-410 (IEC 60364-4-41)

Low-voltage electrical installations Part 4-41: Protection for safety Protection against elec-tric shock

DIN VDE 0100-540 (IEC 60364-5-54)

Low-voltage electrical installations Part 5-54: Selection and erection of electrical equipment Earthing arrangements, protective conductors and protective bonding conductors

DIN VDE 0100-443 (IEC 60364-4-44)

Low-voltage electrical installations Part 4-44: Protection for safety Protection against volt-age disturbances and electromagnetic disturbances Clause 443: Protection against surgevoltages of atmospheric origin or due to switching

DIN VDE 0100-534 (IEC 60364-5-53)

Low-voltage electrical installations Part 5-53: Selection and erection of electrical equipment Isolation, switching and control Clause 534: Devices for protection against surge voltages

DIN EN 61643-11 (IEC 61643-1)Low-voltage surge protection devices Part 11: Surge protection devices connected to low-voltage power systems Requirements and tests


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Installation instructions

Length of the feed line, 1 = Equipotential bond-ing rail or terminal or protective conductor rail

V wiring, 1 = Protective conductor rail, 2 =Main equipotential bonding rail or terminal

1= Power supply, 2 = Cable length, 3 = Con-sumer, 4 = Response voltage 2 kV, e.g. MC50-B VDE 5 = Response voltage 1.4 kV, e.g.V20 C

Minimum cross-sections for light-ning protection equipotential

bondingThe following minimum cross-sec-tions must be observed for light-ning protection equipotential bond-ing: for copper 16 mm2, for alu-minium 25 mm2 and for iron 50mm2.At the lightning protection zone,transition from LPZ0 to LPZ1, allmetal installations must be inte-grated into the equipotential bond-ing system. Active lines must beearthed using suitable arrestors.

Connection length, V-wiring

The connection cable to the pro-

tector is crucial for achieving anoptimum protection level. In accor-dance with IEC installation direc-tives, the length of the branch lineto the arrestor and the length ofthe line from the protection de-vice to the equipotential bondingshould in each case be less than0.5 m. If the cables are longerthan 0.5 m, then V-wiring must bechosen.

Decoupling

Lightning current and surge ar-

restors perform a number of func-tions. These arrestors must beused in coordination. This coordi-nation is guaranteed by the exist-ing line length or special lightningcurrent arrestors (MCD series). Forexample, in the protection set,Type 1 and Type 2 arrestors(Classes B and C) can be usedadjacent to each other.

Example cable length > 5 m No additional decoupling re-

quired

Example cable length < 5 m Use decoupling: MC 50-B VDE

+LC 63 +V20-C Alternatively: MCD 50-B +V20-

C, no additional decoupling re-quired (e.g. protection set)

Minimum dimensions of cables, protection class I to IV

MaterialCross-section of cables, which interconnectdifferent equipotential bonding rails or whichconnect to the earthing system

Cross-section of cables, which connect the internal metallicinstallations with the equipotential bonding rail

Copper 16 mm 6 mm

Aluminium 25 mm 10 mm

Steel 50 mm 16 mm


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4-cable networks, TN-C network system

1 = Main distributor, 2 = Cable length, 3 = Circuit distributor, e.g. subdistributor, 4 = Fine powerprotection, 5 = Main EBS, 6 = Local EBS, 7 = Type 1, 8 = Type 2, 9 = Type 3

In the TN-C-S network system,the electrical unit is suppliedthrough the three external lines(L1, L2, L3) and the combinedPEN line. Usage is described inDIN VDE 0100-534 (DIN EN 61643-11).

Lightning current arrestor Type 1

Type 1 lightning current arrestorsare used in the 3-pole circuit (e.g.:3x MC 50-B). The connection is ef-fected parallel to the external lines,which are connected to the PENvia the arrestor. Following consul-tation with the local energy

provider and in accordance withthe VDN Directive, use before themain meter device is also possi-ble.

Surge arrestor, type 2

Surge arrestors of Type 2 are usu-ally used after the split in the PENline. If the split is more than 0.5maway, the network from here on-

wards is 5-line. The arrestors areused in the 3+1 circuit (e.g. V20-C3+NPE). With the 3+1 circuit, theexternal lines (L1, L2, L3) are con-nected to the neutral cable (N) viaarrestors. The neutral cable (N) isconnected to the protective earthvia a collective spark gap. The ar-restors must be used before aresidual current protective device(RCD), as it would otherwise inter-pret the surge current as a residu-al current and interrupt the power

circuit.

Surge arrestor, type 3

Surge arrestors of Type 3 are usedto protect against surges in the de-vice power circuits. These trans-verse surges occur primarily be-

tween L and N. A Y circuit protectsthe L and N lines with varistor cir-cuits and makes the connectionsto the PE line through a collectivespark gap (e.g.: KNS-D). This pro-tection circuit between L and Nprevents surge currents fromtransverse voltages being conduct-ed towards PE, the RCD thus inter-prets no residual current. The rele-vant technical data is contained onthe product pages.


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5-cable networks, TN-S and TT network system

1 = Main distributor, 2 = Cable length, 3 = Circuit distributor, e.g. subdistributor, 4 = Fine powerprotection, 5 = Main EBS, 6 = Local EBS, 7 = Type 1, 8 = Type 2, 9 = Type 3

In the TN-S network system, theelectrical unit is supplied throughthe three external lines (L1, L2,L3), the neutral cable (N) and theearth cable (PE). In the TT net-work, however, the electrical unitis supplied through the three ex-ternal lines (L1, L2, L3), the neu-tral cable (N) and the earth cable(PE). Usage is described in DINVDE 0100-534 (DIN EN 61643-11).

Lightning current arrestor Type 1

Type 1 lightning current arrestorsare used in the 3+1 circuit (e.g. 3xMC 50-B and one MC 125-B

NPE). With the 3+1 circuit, the ex-ternal lines (L1, L2, L3) are con-nected to the neutral cable (N) viaarrestors. The neutral cable (N) isconnected to the protective earthvia a collective spark gap. Follow-ing consultation with the local en-ergy provider and in accordancewith the VDN Directive, use beforethe main meter device is also pos-sible.

Surge arrestor, Type 2

Surge arrestors of Type 2 are usedin the 3+1 circuit (e.g.: V20-C3+NPE). With the 3+1 circuit, theexternal lines (L1, L2, L3) are con-

nected to the neutral cable (N) viaarrestors. The neutral cable (N) isconnected to the protective earthvia a collective spark gap. The ar-restors must be used before aresidual current protective device(RCD), as it would otherwise inter-pret the surge current as a residu-al current and interrupt the powercircuit.

Surge arrestor, Type 3

Surge arrestors of Type 3 are usedto protect against surges in the de-vice power circuits. These trans-verse surges occur primarily be-

tween L and N. A Y circuit protectsthe L and N lines with varistor cir-cuits and makes the connection tothe PE line through a collectivespark gap (e.g. KNS-D). This pro-tection circuit between L and Nprevents surge currents fromtransverse voltages being conduct-ed towards PE, the RCD thus inter-prets no residual current. The rele-vant technical data is contained onthe product pages.


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Selection aid, energy technology

AC combination arrestor and surge protection; Type 1+2, Type 2 and

Type 3

Initial situation

l No external

lightning protection systeml Earthing cable connection

l External

lightning protection system(according to DIN EN 0185-

305)

l Outdoor connection

Building type Description Type Item no. Test

mark

Product

figure

Private building TN-/TT

Type 2 + 3

2.5 SU

Secondary counter

zone

V10 Compact 5093 38 0

V10 Compact-AS,

with acoustic

signalling

5093 39 1

Multiple dwelling/

industry, commerce

TN-/TT

Type 2

4 SU

Secondary counter

zone

V20-C 3+NPE 5094 65 6 VDE

V20-C 3+NPE+FS

with remote signalling

5094 76 5 VDE

Buildings of

lightning protection

classes III and IV

(e.g. housing, of-

fices and

commercial build-

ings)

TN-/TT

Type 1 + 2

4 SU

Secondary counter

zone

V50-B 3+NPE 5093 65 4

V50-B 3+NPE+FS


5093 66 2

Buildings of

lightning protection

classes I to IV

(e.g. industry)

TN-C

Type 1

6 SU

Pre-metered or

secondary counter

zone

MCD 50-B 3 5096 87 7

TN-S

Type 1

8 SU

Pre-metered or

secondary counter

zone

MCD 50-B 3+1 5096 87 9

Installation location 1Installation in the main distributor box / combined distributorBasic protection / Type 1, Type 2


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Description

TN/TT

Type 2 + 3

2.5 SU

TN/TT

Type 2

4 SU

TN/TT

Type 2

4 SU

TN/TT

Type 2

4 SU

Type Item no. Product

figure

V10 Compact 5093380

V10 Compact-AS,

with acoustic

remote signalling

5093391

V20-C 3+NPE 5094656

V20-C 3+NPE+FS


5094765

V20-C 3+NPE 5094656

V20-C 3+NPE+FS


5094765

VC20-C 3+NPE 5094656

V20-C 3+NPE+FS


5094765

Installation location 2Installation in the subdistributorMedium protection / Type 2Only required if distance 10m

Description

Plug-in

Fixed installa-

tion

Series installa-

tion

in distributor

Type Item no. Test

mark

Product

figure

FC-D 5092 80 0 VDE

FC-TV-D 5092 80 8 VDE

FS-SAT-D 5092 81 6 VDE

FC-TAE-D 5092 82 4 VDE

FC-ISDN-D 5092 81 2 VDE

FC-RJ-D 5092 82 8 VDE

CNS-3-D-D 5092 70 1

SM-A 5092 45 1

SM-A-2 5092 46 0

SS 45-o-RW

6117 47 3

V10 Com-

pact

L1/L2/L3/N

5093 38 0

VF230-

AC/DC

5097 65 0

VF230-AC-

FS

with remotesignalling

5097 85 8

Installation location 2Installation before the terminalFine protection / Type 3


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27OBOTBS

Planning aids, contents lightning and surge protection, photovoltaics

Standards, photovoltaics 28

Responsibility 29

ProtectPlus 30

Coordinated protection 32

External lightning protection for sloping roof systems 34

External lightning protection for flat roof systems 35

Lightning protection equipotential bonding and separatingdistance

36

Planning aid, protective angle method 37

Planning aid, rolling sphere method 38

Four steps to comprehensive protection 39

DC surge protection energy technology, Type 2 40

DC combination arrestor; Type 1+2 and data protection de-vices

41


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Standards, photovoltaics

Various standards must be com-plied with when erecting a photo-voltaic system. You can find themost important European regula-tions here.

Standard Contents

VDE 0185-305-1 (IEC 62305-1) Protection against lightning Part 1: General principles

VDE 0185-305-2 (IEC 62305-2) Protection against lightning Part 2: Risk management

VDE 0185-305-3 (IEC 62305-3) Protection against lightning Part 3: Protection of structures and people

VDE 0185-305-4 (IEC 62305-4) Protection against lightning Part 4: Electrical and electronic systems within structures

VDE 0185-305-3 Supp. sheet 5(DIN EN 62305-3 Supp. sheet 5)

Protection against lightning Part 3: Physical damage to structures and life hazard Supple-

mentary sheet 5: Lightning and surge protection for photovoltaic power supply systems

VDE 0675-11(IEC 61643-1)Low-voltage surge protection devices Part 11: Surge protection devices connected to low-

voltage power systems

VDE 0100-534 (IEC 60364-5-53)Low-voltage electrical installations - Part 5-53: Selection and erect ion of electrical equipment

Isolation, switching and control Clause 534: Devices for protect ion against surge voltages

VDE 0100-443 (IEC 60364-4-44)

Low-voltage electrical installations Part 4-44: Protection for safety Protection against volt-

age disturbances and electromagnetic disturbances Clause 443: Protection against surgevoltages of atmospheric origin or due to switching

VDE 0100-712 (IEC 60364-7-712)

Requirements for operational premises, special rooms and systems - solar photovoltaic (PV)

power supply systems


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Responsibility of the installation engineer and the operator of a photo-

voltaic system

Photovoltaics working party:

The overall responsibility forelectrical safety is in the hands ofthe commissioner.

The specialist company installing a

PV system is required by law to

hand it over in perfect condition.

The erection of a photovoltaic sys-

tem often requires major interven-

tion in the electrical infrastructure

of a building. This is reflected in

the wide range of standards and

regulations to be complied with.

The person erecting the system is

liable for correct fulfilment for 30years, and the requirements of the

insurance company come on top

of that.

Responsibility of the erection en-gineer

Depending on the system type, the

following standards must be com-

plied with:

Lightning protection VDE 0185-305-1 to -4 VDE 0185-305-3 suppl. sheet

5 IEC 62305-1 to -4

Surge protection

VDE 0100-433

IEC 60364-4-44

Low-voltage electrical installa-tions

VDE 0100-534 IEC 60634-5-534

VDE 0100-410

IEC 60634-4-41

VDE 0100-443

IEC 60634-4-44

Requirements for solar PV powersupply systems VDE 0100-712

IEC 60634-7-712

VDE 0126-23

IEC 62446

Construction fire protection DIN 4102

Please observe the appropriatelocal and statutory requirements.

Responsibility of the operator

Through the feed-in of the gained

energy, almost every PV system is

subject to the requirements for

commercial use. For the system

operator, this creates the obliga-

tion to give the system the proper

maintenance, checking and re-

pairs. These regular recurring

checks of the electrical system

components may only be carried

out by an electrical technician.


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With ProtectPlus, photovoltaic systems can beat storms, snow, rain,

cold, sun and heat for decades.


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31OBOTBS

Throughout their lifespan, photo-voltaic systems are exposed tohuge loads. Wind and weathertake their toll on all the compo-nents of the system and lightning

and surge voltages pose a majorrisk to the inverter. ProtectPluscan provide comprehensive pro-tection of the entire systemagainst damaging environmentalinfluences. Protection against direct light-

ning strikes

The enormous energy of lightning

can destroy PV systems in the

blink of an eye, risking the eco-

nomic viability of the entire system.

Long-term monitoring for exam-

ple by BLiDS (Siemens lightning

and information service, http://blid-sde) document a continuous in-

crease in lightning levels and light-

ning strikes.

Protection against surge voltage

On the alternating current side, the

sensitive inverter is threatened by

destructive surge voltages from

switching operations and network

couplings. Lightning strikes gener-

ate dangerous surge voltages in a

radius of two kilometres. In the

worst-case scenario, these voltagepeaks are enough to damage the

core of the system.

Protection against environmentalfactors

Photovoltaic systems are suffering

increasingly meteorological ob-

servations show an increase in ex-

treme weather conditions. Only a

solidly executed installation can

beat rain, snow, heat and cold

throughout the lifespan of the sys-

tem.

Protection against mechanicalloads

A PV system is exposed to differ-

ent mechanical loads. Wind contin-

uously batters all the outdoor sys-

tem components, whereas snow

places huge weights on the whole

system. In the case of vertical ca-

ble routing, heavy loads occur,

which must besupported using an

appropriate strain relief.

Protection against the spread offires

Lightning protection for PV sys-

tems has various requirements:

the spread of fires in the area of

fire protection walls must be pre-

vented, both outside and inside

the building. In emergency and es-

cape routes, the cable routing may

not bring in any fire loads.


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Coordinated protection. The ProtectPlus system kit.

A well-thought-out system for thewhole electrical infrastructure ofa photovoltaic system that'sProtectPlus. Different compo-nents provide comprehensiveprotection, which allows both theerection engineer and the systemoperator to sleep in peace.

External lightning protection sys-tems

Lightning currents are intercepted

and run safely to the earth with the

following systems:

Interception rods and intercep-

tion rods

Insulated lightning protection

Insulated isConarrestor

Flat and round cables

Cable bracket

Connection terminals

Earthing systems

Our products for perfect earthing:

Flat and round cables

Connector

connection terminals

Earth entries

Deep, ring and foundation

earthers Corrosion protection


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33OBOTBS

Equipotential bonding systems

Equipotential bonding systems are

the link between external lightning

protection, surge protection and

earthing. They are available in the

following variants:

For indoor use

For outdoor use

For industrial use

Overvoltage protection systems

A product range for any applica-

tion:

Lightning arrestor/combination

arrestor

Surge protection for energy

and data technology

Complete system solutions,

terminated and premounted in

the housing

Combination and surge ar-restor for photovoltaics, DC

side

Cable support systems

Quick-mounting, safe cable routing

with:

Cable trays

Mesh cable trays

Cable ladders

Vertical ladders

Suspended supports

Wall and support brackets

Cable routing systems

Tidy cable routing within the build-

ing can be achieved using

Wall and ceiling ducts

Cable and pipe fastening sys-

tems made of plastic and met-

al

Screw-in and knock-in systems

Rail systems

Fire protection systems

Our fire protection system consist

of the following components:

Insulation

Weatherproof fire protection

bandages

Systems for emergency and

escape routes


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External lightning protection for sloping roof systems

Complete product range,decades of experience

The inclusion of a photovoltaic sys-

tem into the existing lightning pro-

tection concept of a building is of-

ten neglected during refitting work.

This significantly increases the risk

of considerable damage through a

direct lightning strike.

For public buildings, for example,

the LBO (state construction regula-

tions) require a lightning protectionsystem to protect people and pro-

vide protection against fires.

Our product range and our experi-

ence mean that we can offer the

right solutions for almost any type

of sloping roof. Amongst other

things, it comprises:

Interception rods

Rod holders

Ridge conductor holder

Roof cable holder for ridge

riles

Roof cable holder for various

roofing types

Cable bracket Round and flat conductors

Four materials

Our products are available in four

different materials:

Steel, hot-dip galvanised

Copper

Aluminium

Stainless steel

Conductor, connected with gutter clamp


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35OBOTBS

External lightning protection for flat roof systems

Flat roof with PV system and insulated isConcable

Lightning protection equipoten-tial bonding system

Various points should be observed

when arresting the lightning cur-

rent. Metallic components without

a conductive connection into the

building must be connected direct-

ly to the lightning protection. Active

DC/AC cables and data systems

are included in the equipotentialbonding using suitable lightning

current and surge arresters at the

entry to the building. All metallic

parts of a building and electrically

powered equipment and their sup-

ply cable must be integrated into

the lightning protection system.

Separation distance

Air-conditioning systems, electrical

sensors and photovoltaic systems

are examples for roof structures in

which the separation distance

must be maintained. This distance

is required to avoid dangerous

sparking and lightning compo-

nents between both the external

lightning protection system and themetallic building parts and electri-

cal devices.

In particular, when PV systems are

refitted, this is often not possible

due to the construction situation.

Here, the insulated isCon cable

can help. The ideal solution with

which a separation distance of

0.75m through the air and 1.5m

for solid matter can be maintained.

Lightning protection equipotential bonding onthe PV mounting system


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Lightning protection equipotential bonding system and separation dis-

tance

Figure 1: Separating distance (s) between the lightning protection system and cable support system

Important measures

The following points must be taken

into account to guarantee compre-

hensive protection of the PV sys-

tem:

Local earthing (PAS) must be

connected to the main equipo-

tential bonding (HPAS).

Equipotential bonding cables

must be routed close to andparallel with the DC cables.

Data cables must be included

in the protection concept.

You can find an overview of the

protective measures in the table

"Overview of protective measures".

Separation distance

According to DIN EN 62305, the

lightning protection system must

be erected at a separation dis-

tance (s) from the parts of the PV

system. Usually, a separation dis-

tance (s) (= safety distance) of

0.5m to 1m is sufficient.

Figure 2: Separation distance (s) between thePV and the lightning protection system


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37OBOTBS

Planning aid, protective angle method

Protective angle method for roofstructures

You have protected the flat-roofed

building correctly according to the

standard VDE 0185-305 (IEC

62305). You must now protect all

roof structures with interception

rods. This involves observing the

separating distance (s).

If the roof structure has a conduc-

tive continuation into the building

(e.g. with a stainless steel pipe

with a connection to the ventilation

or air conditioning system), then

the separating distance (s) must

always be maintained. The inter-

ception rod must be erected at acertain distance from the building

to be protected. This distance

safely prevents arcing of the light-

ning current and dangerous spark

creation.

Roof structures with an individu-al air-termination rod

The protective angle for lightning

rods varies according to lightning

protection class.

You can find the protective angle

in the table for the most common

interception rods of up to 2m in

length.

= lightning protection angle, s = separating distance

1 = Lightning protection angle , 2 = Ridge height h in m, 3 = Lightning protection classesI/II/III/IV

Protective angle according to lightning protection class according toVDE 0185-305 (IEC 62305)

Lightning protection classProtection angle for interception rodsto 2 m length

I 70

II 72

III 76

IV 79


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Planning aid, rolling sphere method

p = penetration depth, R = radius of the lightning sphere, d = distance of the interception system Formula for calculating the penetration depth(p)

Roof structures with multiple in-terception rods

If you use several interception rods

to protect an object, you must take

into consideration the penetration

depth between them. For a precise

calculation, use the following for-

mula:

Penetration depth according to the lightning protection class according to VDE 0185-305

Distance of in-terception sys-tem (d) in m

Penetration depthLightning protectionclass I lightning protec-tion sphere: R = 20 m

Penetration depth Light-ning protection class IIlightning protectionsphere: R = 30 m

Penetration depth Light-ning protection class IIIlightning protectionsphere: R = 45 m

Penetration depth Light-ning protection class IVlightning protectionsphere: R = 60 m

2 0.03 0.02 0.01 0.01

3 0.06 0.04 0.03 0.02

4 0.10 0.07 0.04 0.04

5 0.16 0.10 0.07 0.05

10 0.64 0.42 0.28 0.21

15 1.46 0.96 0.63 0.47

20 2.68 1.72 1.13 0.84


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39OBOTBS

Four steps to comprehensive protection

Step 1:Check the separation distance

If the required separation distance

cannot be complied with, then the

metallic parts must be intercon-

nected to be able to carry lightning

current.

Step 2:Check the protection measures

Example: measures for lightning

protection equipotential bonding

are used on the DC and AC side,

e.g. lightning arrester (Type 1).

Step 3:Include data cables

Data cables must be included in

the protection concept.

Step 4:Carrying out the equipotentialbonding

Local equipotential bonding must

be provided on the inverter.

Initial situation

l External lightning protection

system

(according to DIN EN 0185-

305)

l No outside lightning protection

systeml Earthing cable connection

Measure Separation distance ac-

cording to DIN EN

62305 maintained

Equipotential

bonding

Surge

protection

Sample

product

picture

Adapt the lightning protec-

tion system according to

DIN EN 62305

Yes min. 6mm DC: Typ 2

AC: Typ 1

No min. 16 mm DC: Typ 1

AC: Typ 1

Requirements' testing:

LBO, Vds 2010, risk analy-sis,

- min. 6mm DC: Typ 2

AC: Typ 2

Overview of protection measures


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Selection aid

Photovoltaics

Initial situation

l No external

lightning protection sys-

teml Earthing cable connec-

tion

The following are re-

quired:

l Surge voltage

protection, Type 2l Lightning protection

equipotential bonding

6.5 mm

Max. DC

voltage

Max.

number

of MPPper inverter

Max.

number

of stringsper MPP

Connection

(DC side)

Version Type Item no. Product

figure

600 V Completeblock

V20-C 3PH-600 5094 60 5

1 1 MC 4

connector

System

solution

VG-C DCPH-Y600 5088 67 0

1000 V Completeblock

V20-C 3PH-1000 5094 60 8

1 1 MC 4

connector

System

solution

VG-C DCPH-Y1000 5088 67 2

1 4 Terminals PC housing VG-C DCPH1000-4K 5088 65 0

1 4 Terminals String fuse

(+pole),

PC housing

VG-C DCPH1000-4S 5088 65 1

1 6 Terminals System

solution

VG-C DCPH-MS1000 5088 69 1

1 6 Terminals String fuse

(+pole),PC housing

VG-C DCPH1000-6S 5088 65 2

2 2 MC 4

connector

PC housing VG-C DCPH1000-21 5088 64 6

3 2 MC 4

connector

PC housing VG-C DCPH1000-31 5088 64 8

Energy technology, Type 2, protection of the DC side

You can find the selection aid forAC combination arresters andsurge protection in the chapterSurge Protection in Energy Tech-nology.


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41OBOTBS

Initial situation

l External lightning protec-

tion

system according to DIN

EN 0185-305

The following are required:

l Lightning and

surge protection

Type 1+2l Lightning protection

equipotential bonding

16 mml Separating distance

could notbe maintained

Max. DC

voltage

Max.

number

of MPPper in-

verter

Max.

number

of stringsper MPP

Connection

(DC side)

Version Type Item no. Product

figure

600 V Completeblock

V50-B+C 3-PH600 5093 62 3

1 1 System

solution

VG-BC DCPH-Y600 5088 67 6

1 6 Terminals System

solution

VG-BC DCPH-MS600 5088 69 3

1 5 Terminals Remote

signalling

VG-BC DC-MSFS600 5088 69 5

900 V Completeblock

V25-B+C 3-PH900 5097 44 7

1 1 MC 4

connector

System

solution

VG-BC DCPH-Y900 5088 67 8

1 Terminals System

solution

VG-BC DCPH-MS900 5088 69 2

1 5 Terminals Remote

signalling

VG-BC DC-MSFS900 5088 69 6

2 2 MC 4

connector

PC housing VG-B+C DC-DH900-21 5088 62 5

3 2 MC 4

connector

PC housing VG-B+C DC-DH900-31 5088 62 9

Energy technology, Type 1+2, protection of the DC side

Initial situation

RJ 45 Terminal Type Item no. Product

figure

l No external lightning protection

system

l Earthing cable connection

l ND-CAT6A/EA 5081 80 0

l External lightning protection system

(according to DIN EN 62305)l FRD 24 HF 5098 57 5

Data technology


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Planningaids,surgeprotectiondevicefordataandinformationtechnology

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Standards in data and information technology

Various standards have a role inthe field of data and telecommu-nications technology. Fromstructured building cablingthrough equipotential bonding upto EMC, various different stan-dards must be taken into ac-count. Some important standardsare listed here.

Standard Contents

IEC 61643-21Low voltage surge protective devices Part 21: Surge protective devices connected to

telecommunications and signalling networks. Power requirements and testing method.

DIN EN 50173-1 Information technology Generic cabling systems Part 1: General requirements

DIN VDE 0845-1Protection of telecommunication systems against lightning, electrostatic discharges and

surge voltages from electric power installations; provisions against surge voltages.

DIN VDE 0845-2Protection of data processing and telecommunications equipment against the impact of

lightning, discharge of static electricity and surge voltages from heavy current systems

Requirements and tests of surge voltage protection devices

DIN EN 50310 (VDE 0800-2-310)

Application of equipotential bonding and earthing in buildings with information technology

equipment.

EN 61000-4-5 (VDE 08457-4-5)Electromagnetic Compatibility (EMC) Part 4-5: Testing and measurement techniques

Surge immunity test.

EN 60728-11 (VDE 855-1)Cable networks for television signals, sound signals and interactive services Part 11:

Safety (IEC 60728-11:2005).


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Important terms and basic principles

1 = power lines, 2 = data lines, 3 = item to be protected, LPZ = Lightning Protection Zone

Basic principles

These days, communication and IT

systems are the lifelines of almost

every company. In the worst-case

scenario, surge voltages, caused

by galvanic, capacitive or inductive

couplings in data cables, can de-

stroy IT equipment and communi-

cation technology. To avoid such

failures, suitable protection mea-

sures have to be taken.

In practice, the wide range of stan-dard information, telecommunica-

tion and measurement systems of-

ten makes the selection of the

right surge protection device com-

plex. The following factors must be

taken into account:

The connection system of the

protection device must fit the

device to be protected.

Parameters such as the high-

est signal level, highest fre-

quency, maximum protection

level and the installation envi-

ronment must be taken intoaccount.

The protection device may on-

ly exert the minimum of im-

pacts, such as attenuation and

reflection, on the transmission

path.

Protection principle

A device is only protected against

surge voltages if all energy and

data cables connected to the de-

vice are integrated into the equipo-

tential bonding system at the light-

ning protection zone transitions

(local equipotential bonding). OBO

Bettermann offers a complete

range of tried-and-tested, highly

functional and reliable data cable

protection devices for all standardtelecommunication and information

technology systems.


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Network topologies

Bus topology

In a bus topology, all users are

connected in parallel. At its end,

the bus must have an anechoic

closure. Typical applications are

10Base2, 10Base5 and machine

controllers such as PROFIBUS and

telecommunication systems such

as ISDN.

1 = IT devices, 2 = Surge protection devices

Star networks

In a star network, every worksta-

tion is supplied by a separate ca-

ble from a central star point (HUB

or Switch). Typical applications are

10BaseT and 100BaseT.

1 = Server, 2 = Switch/Hub, 3 = Surge protection devices


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Network topologies and connection types

Ring topology

In a ring topology, every worksta-

tion is connected to precisely one

predecessor and one successor

via a ring-shaped network. If one

station fails, the entire network

fails. Ring networks, e.g. in Token

Ring applications.

The number of wires varies according to the network type. 1 = Server, 2 = Ground floor, 3 = 1st

floor

Telephone systems

In many cases, modern telephone

systems also act as interfaces for

a number of different data ser-

vices, e.g. the Internet. Many termi-

nal devices that enable this access

are connected into the lines them-

selves and must be integrated intothe surge protection concept ac-

cordingly. As there are now a num-

ber of different systems, these de-

vices must have selective protec-

tion. There are three distinctly dif-

ferent essential systems:

Standard analogue connection

Unlike other systems, the standard

analogue connection offers no ad-

ditional services. One or several

telephones are wired in a star-

shape and ring simultaneouslywhen a call comes in. Access to

the Internet is via a separate mo-

dem. Because the analogue con-

nection without technical acces-

sories provides only one channel,

the Internet cannot be accessed

while telephoning and likewise, no

telephone call is possible while

surfing.

ISDN (Integrated Services DigitalNetwork System)

In contrast to the analogue con-

nection, ISDN allows two conver-

sations to take place at the same

time via a special bus system (S0

bus), which provides two channels.

This enables the user to surf onthe Internet while telephoning and

at higher data rates than is possi-

ble with the analogue connection

(64 kBit/s over one channel).

ISDN also offers other services

such as call-waiting, call-back, etc.

DSL system (Digital SubscriberLine)

Today, the most commonly used

system is the DSL system. Speech

and data channels are separated

by splitters and the data channel is

routed to a special modem

(NTBBA), which is connected tothe PC via a network card. DSL

data rates are higher than those of

analogue and ISDN systems and

therefore enable fast downloading

of music and films from the Inter-

net. Because there are a number

of different DSL versions such as

A-DSL and S-DSL, the general DSL

is also designated X-DSL. X-DSL

permits the use of analogue tele-

phones without additional hard-

ware, as well as a combination

with ISDN.


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Type differences, lightning barriers

FRD/FLD

Lightning barriers TKS-B, FRD,

FLD, FRD 2 and FLD 2 protect

electronic measuring, controlling

and regulating systems from

surges. Lightning barriers of type

MDP are used in areas requiring

particularly small installation widths

with simultaneously high numbers

of poles.

Type FRD, FLD and MDP lightning

barriers are designed for use in

so-called floating (asymmetrical,

potential-free) two-core systems.

These are systems whose signal

circuits have no common refer-

ence potential with other signal cir-cuits, e.g. 20 mA current loops.

These devices can be used univer-

sally.

Circuit diagram of the lightning barrier FRD/FLD

FRD2/FLD2

Type FRD2 and FLD2 are intended

for use in ground-referenced (sym-

metrical, potential-referenced) sin-

gle-wire systems.

Earth-referenced systems are sig-

nal circuits that have a common

reference potential with other sig-

nal circuits. In these systems, two

further data cables besides earth

are protected. The decision to use

FRD (with resistive decoupling) or

FLD (with inductive decoupling)

depends on the system to be pro-

tected.

Circuit diagram of the lightning barrier FRD2/FLD2


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Lightning barriers in measurement circuits and terms for HF technology

Basic protection circuit in measuring circuit

Use of lightning barriers in mea-suring circuits

Before lightning barriers are used

in measuring circuits, it must first

be confirmed whether a resistance

increase is permitted. Depending

on the decoupling, resistance in-creases in the measuring circuits

can occur with types FRD and

FRD2. This can result in errors

with current loop measurements.

FLD/FLD2 and/or MDP devices

should therefore be used in this

case. The maximum operating cur-

rent should also be verified to en-

sure that the dissipated energy

does not cause thermal destruc-

tion of the decoupling elements.

In the case of arresters with inte-

grated inductivities for decoupling,the signal is attenuated at high

transfer frequencies. Therefore,

when used in measuring circuits

with high transfer frequencies,

lightning barriers with resistive de-

coupling elements are the pre-

ferred solution.

Insertion loss

Insertion loss describes the damp-

ing of a system from input to out-

put. It shows the transfer function

of the system and accommodates

the 3dB point (see figure Limit fre-

quency).

Return loss

This parameter indicates in dB

how much input power is reflected

back. In 50 systems, these val-

ues are around 20 db. This value

is important for antenna systems.

In the case of arrestors with inte-grated inductivities for decoupling,

the signal is damped at high trans-

fer frequencies. Therefore, when

used in measuring circuits with

high transfer frequencies, lightning

barriers with resistive decoupling

elements are the preferred solu-

tion.


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Terms for HF technology and installation instructions

Cut-off frequency fg

The cut-off frequency fg describes

the frequency-dependent behav-

iour of the arrestor. Capacitiveand/or inductive component prop-

erties ensure signal damping at

higher frequencies. The critical

point is described as the cut-off

frequency fg. From this point on-

wards, the signal has lost 50% (3

dB) of its input power. The cut-off

frequency is determined according

to certain measuring criteria. Usu-

ally, in the absence of any values,

the cut-off frequency relates to so-

called 50 systems.

Attenuation curve in the Bode diagram

Installation instructions

The surge protection device must

be connected as close as possible

to the device to be protected. The

housing of the device to be pro-

tected should if necessary be de-

fined as a local earthing point. In

addition, care should be taken to

ensure short PE line distances

from surge protection device to

earthing point (housing) line

length max. 0.5 m.

Installation information: 1 = ISDN, 2 = Protection device


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Equipotential bonding of data cables

Equipotential bonding of data ca-bles

In contrast to energy technology,

data technology has lengthwise

and transverse voltages, which

must be minimised using suitable

arrestors with voltage-limiting com-

ponents.

To achieve low protection levels,

these surge protection devices

must be included in the equipoten-

tial bonding via the shortest route.

Long cable routes should beavoided. The best solution is local

equipotential bonding.

The inclusion of the shields is also

of key importance. Complete

shield action against capacitive

and inductive coupling can only be

effective when the shield is includ-

ed with low impedance on both

sides in the equipotential bonding.

1 Device to be protected/telecom line

2 Direct connection to equipotential bonding (preferred)

3 Gas discharge arrestor (indirect shielding)

4 Gas discharge arrestor

5 Connection to equipotential bonding

6 Equipotential bonding rail

7 Telecommunications line

8 Electrical energy cable

9 Surge protection device (energy technology)

10 Conductive shield of the data cable


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Terms and explanations for PC interfaces

InterfacesExternal devices such as print-

ers, scanners and control sys-tems activated via serial or paral-lel interfaces must be additionallyintegrated into the surge protec-tion concept. There are a range ofinterfaces for different applica-tions: from bus lines for telecom-munication and data transferthrough to simple terminal de-vices such as printers or scan-ners. OBO also offers a host ofprotective devices that are simpleto install, depending on the par-ticular application.

There is a range of interfaces for

different applications: from bus

lines for telecommunication and

data transfer through to simple ter-

minal devices such as printers or

scanners. OBO also offers a host

of protective devices that are sim-

ple to install, depending on the

particular application.

RS232 interface

The RS232 is a frequently used in-

terface. It is often used, for exam-

ple, for modems and other periph-

erals. Although now largely re-

placed by the USB interface, The

RS232 standard is still frequently

used for control cables.

RS422

The RS422 is a serial high-speed

standard suitable for communica-

tion between a maximum of ten

users, which is designed as a bus.

The system can be designed for a

maximum of eight data cables, al-

though two are always used as

send and receive cables.

RS485 interface

The RS485 industrial bus interface

differs slightly from the RS422 in

that the RS485 enables the con-

nection of several transmitters and

receivers (up to 32 users) via a

protocol. The maximum length of

this bus system, when twisted-pair

cables are used, is approx. 1.2 km

with a data rate of 1 MBit/s (de-

pendent upon serial controllers).

TTY system

Unlike the RS232 or other serial

interfaces, the TTY system is not

voltage-controlled - instead it deliv-

ers an imposed current (4-20 mA).

This enables cable lengths of up

to several hundred metres to be

realised.

V11 interfaceV11 is the German designation for

the RS422. The American nomen-

clature, however, is the most wide-

ly used.

V24 interfaceV24 is the German designation for

the RS232. The American nomen-

clature, however, is the most wide-

ly used.


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Selection aid

Telecommunications systems

Topology

Analogue telephone connection

ISDN connection

ISDN multiplex

DSL and analogue telephone

DSL + ISDN connection

Description Type Item no. Product

figure

Basic protection in front of telecommunica-

tions system, 1 two-core wire

TKS-B 5097 97 5

Combined protection up to 2 two-corewires SC-Tele 4-C-G 5081 68 8

Combined protection in RJ 11 version RJ11-Tele 4-C 5081 92 0



TKS-B 5097 97 5

Combined protection up to 2 two-corewires

in front of NTBA

SC-Tele 4-C-G 5081 68 8

Basic protection magazine up to 10 two-

core wires (please order connection strip

5084008 as well)

LSA-B-MAG 5084 02 0

Separating strip for combination protection

for 10 two-core wires

LSA-T-LEI 5084 01 2

Combined protection each for 1x two-core

wire

LSA-BF-180 5084 02 4

Earthing strip for combination protection LSA-E 5084 03 2

Integrated LSA solution in the housing LSA-G 5084 04 8


tions system, 2 two-core wires

TKS-B 5097 97 5




TKS-B 5097 97 5


Installation location 2Installation directly on the telecommunications terminal


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Description

Fine protection in front of analogue terminal

Combined protection in RJ 11 version

Fine protection in front of ISDN terminal

Fine protection in front of PC

Alternatively as connector system



Alternatively as connector system


Fine protection in front of analogue terminal




figure

RF11 Tele 4-F 5081 93 9

Combined protection in

RJ 11

version

5081 92 0

Net Defender 5081 80 0


FC-ISDN-D 5092 81 2



FC-ISDN-D 5092 81 2


RJ11 Tele 4-F 5081 93 9



Installation location 2Installation directly on the telecommunications terminal


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Selection aid

MSR systems

Topology

Various, e.g.:l Multi-wire signal systemsl Fire alarm systems

Various sensors, e.g.:l 4-20 mAl Current loops

Bus systems/controllers


figure

Protection of the power supply

AC and DC

VF 230-AC/DC 5097 65 0


AC and DC

VF 230-AC/DC 5097 65 0

Protection of the power supply VF 230-AC/DC 5097 65 0


AC with remote signalling

VF 230-AC-FS 5097 85 8


AC/DC with remote signalling

VF2-230-AC/DC-FS 5097 93 9

Installation location 1Power supply


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Description

Protection of up to 10 two-core wires

(select appropriate accessories)

(please order connection strip 5084008

as well)

2-wire protection for high peak currents

4-wire protection with test function


2-wire protection

2-wire protection for HF applications

2-wire protection for high peak currents


Protection of RS232 applications

Type Item no. Test

mark

Product figure

LSA-MAG 5084 02 0

TKS-B 5097 97 6

MDP-4/D-24-T 5098 43 1 UL

MDP-4/D-24-T 5098 43 1 UL

FLD 24 5098 60 3 UL

FRD 24 HF 5098 57 5 UL

TKS-B 5097 97 6

MDP-4/D-24-T 5098 43 1 UL

SD25-V24 25 5080 27 4

Installation location 2Protection on the sensor


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Selection aid

MSR systems

Topology

Application with high

nominal currents (wind power)

Sensors in Ex areas

Description Type Item no. Test

mark

Product

figure

Surge protection

for 440 V/690 V network

V20-C 3+MB25+FS 5094902 VDE


for control units up to 230 V

VF 230-AC/DC 5097650

Protection for control units

up to 24 V nominal voltage

VF 24 AC/DC 5097607 UL


(non-Ex) up to 230 V

5097650


(non-Ex) with IR up to 230 V

VF 230-AC-FS 5097858

AC / DC protection ofcontrol units

(not EX) to 5 V

VF 12 AC/DC 5097453 UL

AC / DC protection of

control units

(not EX) to 24 V

VF 24 AC/DC 5097607 UL

AC / DC protection of

control units(not EX) to 48 V

VF 24 AC/DC 5097615 UL

Installation location 1Power supply


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Description


and nominal currents up to 10 A

2-wire protection without testing point

Intrinsically-safe surge protection

for 3 cables in the housing (metric

thread)

Intrinsically-safe surge protection

for 3 cables in the housing (NPT thread)

4-wire protection to 5 V, Ex tested



Type Item no. Test

mark

Product

figure

MDP-4/D-24-T 5098 43 3 UL

TKS-B 5097 97 6

FDB-3-24-M 5098 38 2 Ex

FDB-3-24-N 5098 39 2 Ex

MDP-4/D-5-EX 5098 41 2 Ex

MDP-4/D-24-EX 5098 43 2 Ex

MDP-4/D-48-EX 5098 45 2 Ex

Installation location 2Protection on the sensor


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Selection aid

Data technology / network technology

Topology

Star topology

Bus topology

Various network applications


figure

Basic protection of the incoming

cable (please order connection

strip 5084008 as well)

LSA-B-MAG 5084 02 0

Combined protection of the in-

coming

cable

SC-Tele/4-C-G 5081 68 8

Combined protection BNC

connection

CoaxB-E2/MF-C 5082 41 2

Combined protection

N connection

CoaxN-E5/MF-C 5082 46 3

Combined protection for

two-core wire

SC-Tele/4-C-G 5081 68 8

Protection of the Wi-Fi port /

Power over Ethernet


IP cameras Net Defender 5081 80 0

VoIP applications Net Defender 5081 80 0

Installation location 1External communication cable


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Description

Data cable protection for channel

CLASS EA

Data cable protection for channel

up to Class D

Fine protection with BNC connection

(Class C)

Fine protection for 230 V power supply,

connectable

Fine protection for hat rail installation


figure


RJ45-ATM/8-F 5081 79 3

CoaxB-E2/MF-F 5082 42 0

FC-D 5092 80 0

VF 230-AC/DC 5097 65 0

Installation location 2Protection on the terminal


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Selection aid

Antennas

Topology

HF applications (overview)

SAT protection

CCTV application

CATV


figure

N connection DS-N (m/f) 5093 99 6

S-UHF connection S-UHF (m/f) 5093 02 3

BNC connection DS-BNC (m/m) 5093 26 0

TNC connection DS-TNC (m/f) 5093 27 0

7/16 connection DS-7 16 (m/f) 5093 17 1

SMA connection DS-SMA 5093 27 7

LNB protection / receiver DS-F m/f 5093 27 5

LNB protection / receiver DS-F f/f 5093 27 2

Protection device for Multiswitch

(4xSat; 1xterrestrial)

TV 4+1 5083 40 0

Protection of IP-

based CCTV


Protection of CCTV

camera (coaxial)

Coax B-E2 MF-F 5082 42 0

F connection DS-F m/f 5093 27 5

DS-F f/f 5093 27 2

Installation location 1Installation between BC transition point and amplifier or SAT system


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Description

Fine protection for terminal





Type Item no. Test

mark

Product

figure

FineController FC-SAT-D 5092 81 6 VDE

FineController FC-TV-D 5092 80 8 VDE


FC-D 5092 80 0 VDE


Installation location 2Installation directly on the terminal


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Planning aids, protection and spark gaps

Protection and spark gaps/ATEX approval 66

Installation principle for protec

katalog tbs 2012 en

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