YOUR SAFETY IS IMPORTANT. Low fire hazard cables. PRAKAB

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PRAKAB.CZ | MEMBER OF SKB-GROUP PRAKAB.CZ | MEMBER OF SKB-GROUP

PRAKAB PRAŽSKÁ KABELOVNA, s.r.o. Ke Kablu 278 | CZ-102 09 Praha 15 Tel. +420 272 070-111 Fax +420 272 070-181 office@prakab.cz | prakab.cz GPS coordinates: 50°03.702’ N 14°32.472’ E PRAGUE PRAKAB PRAGUE PRAGUE PRAGUE NITRA NITRA NITRA KIEV KIEV KIEV SAINT SAINT PETERSBURG PETERSBURG SCHWECHAT SCHWECHAT SCHWECHAT SAINT PETERSBURG

YOUR SAFET Y IS IMPORTANT.

Low fire hazard cables.

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COMMITED TO CABLE SOLUTIONS.

Our company PRAKAB PRAŽSKÁ KABELOVNA, s.r.o. was founded in 1921 and ranks among the leading European manufacturers of cables used in energetics, telecommunications, construction industry and other areas. Thanks to more than 90 years of experience and investment in modern production equipment and testing systems we have become renowned Low Fire Hazard Cable (LFHC)/Flame Retardant Non-Corrosive (FRNC) producers and experts.

The membership of our company in SKB-GROUP also plays a vital role, because the group as a whole puts emphasis on development, innovations, team cooperation as well as exchange of experience.

We are fully committed to the solutions you're looking for. From Schwechat and Prague to Nitra, Kiev and Saint Petersburg.

Ing. JAROMÍR SCHMID Managing director

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PRAKAB | OUR COMPANY

All our cables meet requirements of relevant standards applicable to:

• Self-extinguishing properties as per IEC 60332-1-2;

• Fire propagation in bundles as per EN 60332-3-22;

• Corrosive behaviour of gases during fire as per EN 50267-2-2;

• Smoke density as per EN 61034-2;

• Unprotected cables in emergency circuits as per EN 50200 ed.2 or EN 50362 (for cable types PRAFlaDur®and PRAFlaGuard®);

• Insulation integrity/function maintenance as per IEC 60331-21,-23 (for cable types PRAFlaDur®and PRAFlaGuard®);

• Functional integrity of the complete cable system as per ZP 27/2008 (for cable types PRAFlaDur®and PRAFlaGuard®).

A revolutionary innovation are PRAFlaGuard®SPF cables provided with insulation made out of ceramicizing silicone foamrubber. This innovative technology allows us to produce even such cable types which could not be normally produced to meet low fire hazard requirements. Thanks to this, these new types of communication cables achieve significantly better transmission parameters compared to conventional halogen-free types.

In 2002 the company, being one of the few to do so in the Czech Republic, opened its own

LFHC/FRNC test centre, where it carries out a wide range of tests. The most important encompass measurement of heat and smoke release and the CPD test, which evaluates combustion products that result from cable burning.

PRAKAB products meet the strictest requirements of national and international standards

and regularly obtain certificates from international certification bodies. PRAKAB has therefore earned the reputation of a top-quality and reliable supplier and belongs to European market leaders.

ADVANCED LOW FIRE HAZARD CABLE SOLUTIONS.

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Hospitals

In medical facilities there is a higher concentration of people with limited mobility or orientation abilities and the staff is not able to ensure quick and efficient evacuation in case fire breaks out for all hospi-talized people. Moreover, any functional failures in crucial departments such as operating theatres or intensive care and emergency units are out of the question. The standards for wiring in medical facilities are therefore very strict and that is why it is very advisable to use LFHC/FRNC cables that guarantee functionality even during fire and reduce the risks connected with the evacuation of people.

Reference projects: Hospitals in Brno and Mladá Boleslav (CZ)

Arenas and Exhibition Halls

In places like cinemas, theatres or congress halls and other spaces that temporarily produce areas with a high concentration of people, there is always a high risk of mass hysteria. A primary cause can be not only fire but also smoke emissions inside the space. The use of LFHC/FRNC cables for all wiring is the most efficient prevention of a panic outbreak. Our LFHC/FRNC cables are tested and certified for various levels and requirements on functional integrity of the complete cable system which is crucial for the evacuation of people and equipment protection.

Reference projects: National Sports Complex OLYMPIC, Kiev (UA), Donbas Arena, Doneck (UA), Arena Lviv, Lviv (UA), Ice sport Centre Bratislava (SK)

Protection of Devices and Instrumentation

There are many places at which the health risks are low but development of a fire could cause serious damage of important systems. Besides the above mentioned flight control systems or ER and ICU’s in hospitals they include, for example, computer server rooms or central control/dispatcher rooms and rescue service control rooms. Corrosive effects of smoke from conventional cables may cause irreversible damage to sensitive systems, and therefore we would recommend using our LFHC/FRNC cables for such applications.

FIELDS OF APPLICATION AND REFERENCE

PROJECTS.

When cables with PVC insulation or sheath are burning, dangerous black-coloured dense smoke containing lots of chlorine develops. It reacts with humid air and creates acidic corrosive environment that is dangerous both for people and materials. Therefore, we recommend that our certified LFHC/FRNC (PRAFla) cables are used for rooms and places with a high concentration of people or expensive technologies. These cables, when burning, are able to maintain optical transparency of the developing smoke. This enables sufficient orientation of evacuated persons and fire brigades. Combustion products are neither toxic nor hazardous for people, buildings or equipment. Use of cables with halogen-free insulation is required for places with a high concentration of people and animals and protection of property.

Subways

For subways, tunnels, evacuation corridors and similar projects, our LFHC/FRNC cables fully meet requirements on functionality and zero content of halogen components. For these premises we supply our fire-resistant LFHC/FRNC cables, which guarantee the functionality of signalling, evacuation inter-com, emergency light, ventilation and door opening over a requested period of time. They also ensure that burning insulation does not drop down from ceiling installations on evacuated persons. The smoke concentration generated by these cables during fire is so low that sufficient visibility is maintained.

Reference projects: Prague subway (CZ), Vienna subway (AT), Almaty subway (KZ), Warszawa subway (PL)

Airports

When planning cable installations at the airports, special attention must be paid to the areas with high passenger traffic, storage areas for materials and luggage or sites with control system installations. In such cases, use of LFHC/FRNC cables in combination with other functional integrity elements of the complete cable systems is most suitable for health protection, safe evacuation and avoiding damage to technological equipment. The ability to function even when on fire is very important, because it ensures the functionality of the device to which the cables are installed.

Reference projects: Ruzyně Airport (Prague, CZ), Skylink Airport (Vienna, AT), Borispol Airport (Kiev, UA), Zhuliany Airport (Kiev, UA).

Hotels and Other Accommodation Facilities

In enclosed spaces with a high concentration of visitors, it is very difficult to find appropriate solutions for quick and safe evacuation of people in the event of fire. It may be complicated due to lack of knowledge of the space and even made impossible due to smoke and toxicity of the environment. Therefore, any installation of cables with PVC insulation or sheath is totally unsuitable in such cases.

Our LFHC/FRNC cables fully meet requirements on ensuring safety in the event of fire in spaces such as hotels, residential buildings and cultural facilities. We also offer suitable products for the installations to provide ventilation for escape routes and power supply for evacuation and fire-fighting lifts or booster pumps of the firewater main.

Reference projects: Diamant Hotel (Prague, CZ)

Shopping Malls and Office Blocks

In shopping malls, our LFHC/FRNC cables are often installed with cable support systems. The reason for this is the need to ensure the functionality of fire-extinguishing installations, ventilation, emergency escape lighting and other evacuation devices. LFHC/FRNC cables also, owing to their composition, prevent the dropping down of burning particles that could increase the risk of vertical fire spread and injuries of persons present at the time.

Reference projects: Allegro head office (Poznań, PL), Ikea Černý Most (CZ)

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Smoke density

An important parameter in evaluating the smoke evolved during burning is also smoke density, i.e. ability to reduce light trasmission. Dense smoke may cause poor orientation of persons in the event of fire and make their evacuation more difficult.

The test is specified in the following standard:

EN 61034-2 Measurement of smoke density of cables burning under defined conditions.

3. Functional integrity of Electric Cables in the Event of Fire

In the event of a fire it is essential that some installations which are necessary for the protection of persons and buildings keep their functional integrity. This requires uninterrupted power supply and transmission of necessary information to such installations. For this purpose, cables with such properties have been developed to be able to work without interruption or fault even if running immediately through the centre of the fire. They keep their functional integrity while neither power supply, nor information transmission is interrupted.

Circuit integrity and insulation functional integrity

The first method that investigates the ability of cables to keep their functional integrity and transmit power or information even during and after the fire is the method specified in the following set of standards:

EN 60331-xx Tests for electric cables under fire conditions - Circuit integrity. During the test, cables are connected to nominal voltage

and exposed to direct impact of flame. Then the time during which the cable is able to work is measured.

The cables are normally designed to properly work for a period of 180 minutes.

Functional integrity for safety circuits

A more demanding alternative of the above mentioned test method is another method specified in the following standard:

EN 50200 Test method for resistance to fire of unprotected small cables for use in emergency circuits. During this test, cables are subjected to mechanical stress in addition to high temperature and electric voltage. A metal rod impacts the test plate to which the cable is fastened every 5 minutes. Mechanical vibrations are simulated at the same time.

PROPERTIES OF ELECTRIC CABLES

IN THE EVENT OF FIRE.

Behaviour of electric cables in the event of fire can be evaluated from four points of view:

1. Fire Spread on Cable Surface

In most cases, electric cables are manufactured from materials which are more or less flammable. Considering the manner of use of the cables, products that connect various areas of one room or various spaces in one building, they have good attributes to spread fire throughout the building. To avoid such situations or to minimize such effects, we develop and test cables that would not spread fire. All cables designated as LFHC/FRNC practically do not spread fire.

To check this functional integrity property, two basic test methods are used:

Flame spread test

The test verifies whether a single wire or cable spreads fire by itself by spreading flame on its surface.

The test is specified in the following standards:

EN 60332-1-2 Test for vertical flame propagation for a single insulated wire or cable – Procedure for 1kW pre-mixed flame.

EN 60332-2-2 Test for vertical flame propagation for a single small insulated wire or cable - Procedure for diffusion flame.

Test of fire propagation in bundles

Analogically to previous case, the test verifies the extent of flame spread on surface of cables which are installed in a bundle in this particular case.

The test is specified in the following set of standards:

EN 60332-3-xx Tests on electric and optical fibre cables under fire conditions – Test for vertical flame spread of vertically-mounted bunched wires or cables.

Non-propagation of flame is checked also during tests on reaction to fire of electric cables, see below.

2. Properties of Gases Evolved during Combustion

Gases evolved during combustion of cables may have various hazardous properties:

Corrosion effects of gases evolved during combustion

Corrosiveness, i.e. ability of gases to create aggressive environment and cause corrosion, is one of the crucial parameters. This is an important factor also because the corrosive atmosphere may cause damage to the installations which have

not been immediately affected by fire.

The test is specified in the following standard:

EN 50267-2 Common test methods for ca-bles under fire conditions – Tests on gases evolved during combustion of materials from cables.

LFHC

LFHC

ČSN EN 50266

ČSN EN 60332

LFHC

PRAKAB | PROPERTIES OF ELECTRIC CABLES IN THE EVENT OF FIRE

V180 / FE180

ČSN EN 50267

940°C

ČSN EN 60331

850°C

1kV

10µS/cm

PH 4,5

ČSN EN 61034

4,5 mV

ČSN EN 50200

5 min.

1 kV

PH90

LFHC

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Functional integrity of cable system

The most demanding method for checking functional properties of cables in the event of fire is a large-scale test method for testing functional integrity of a cable system.

There are not only the cables themselves, but also the complete cable system tested in this case. The test includes cables, cable supports and connecting elements. They are installed in a big test chamber in which conditions similar to real fire event are being maintained by means of large burners.

No European test method been developed for this test so far.

4. Reaction to Fire Performance of Electric Cables

Measurement of released heat and smoke at flame spread test

It is important to know how much heat is released from cables during burning and how the cables contribute in general to an evolving fire. This property is established in a complex test upon which the cables are classified in so called Euro classes for reaction to fire. These classes and pertinent requirements are given in the Commission Decision 2006/751/EC.

The test is specified in the following standard:

EN 50399 Common test methods for cables under fire conditions - Heat release and smoke production measurement on cables during flame spread test.

E30/E90/P30-R/P90-R/PS30/PS90

ADVANTAGES OF E90/E30 SYSTEM.

Where running in the interiors, power cables and signal/data transmission cables are usually laid in cable support systems. They are composed of cable lines complete with all support elements such as trays, ladders, clamps, holders, etc. Fire resistance and functional integrity of the installation in whole must meet relevant standards related to safety levels for the persons, equipment and materials threatened by fire. In buildings and facilities with a higher risk of fire and high concentration of people (hospitals, leisure centres, shopping malls, airports, tunnels, subways, etc.), fire safety systems will enable proper and safe evacuation of persons and materials and the follow-up firefighting action by fire brigades.

These buildings are protected by fire safety systems that must maintain their functional integrity over a certain period of time even in fire cases. However, most of the systems need a permanent supply of power and/or transmission of signals and data for proper functioning. Therefore, it is absolutely essential to maintain functional integrity of the complete cable system at the same time.

We test the cable systems in line with the DIN 4102-12 standard requirements in test chambers, in which they are exposed to fire model scenarios. According to test results the cables are classified with functional integrity class and period over which they maintain their functional integrity.

Due to absence of a European standard the designation of functional integrity classes may vary in national standards. The standard DIN 4102-12 distinguishes classes E30 and E90 according to functional integrity time in minutes. The test is passed successfully if no fault or interruption of wire occurs during the test.

According to DIN 4102-12, there are 4 standard support systems defined:

• Installation of cables on cable ladders • Installation of cables on cable trays • Installation of cables on single clamps

• Installation of cables on U-clamps with long trough

Standard cable support systems have precisely defined parameters and dimensions and their great advantage is that the results of performed tests can be used for other systems. Cable certified for a standard support system of one manufacturer can be installed on a standard support system of another manufacturer. Because of big variety of projects, manufacturers of cable support systems produce huge quantities of non-standard cable support systems at more favourable prices with higher flexibility during the installation and possibly easier assembly. Their main disadvantage is that the test results are not transmittable, i.e. it is necessary to adhere to the manufacturer, type of cables and support systems, for which the type of installation has been tested.

PRAKAB | PROPERTIES OF ELECTRIC CABLES IN THE EVENT OF FIRE

ZP 27/2008; STN 92 0205; DIN 4102-12

1000°C

B2

ca

, C

ca

, D

ca

, E

ca

, F

ca

Pr EN 50399

25°C

1 m/s

30 mA

O

2

20,95

CO

2

4,6

PROPERTIES OF ELECTRIC CABLES

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Cable ladder Cable tray

Single clamp Single clamp with support

Cable ladder Cable tray

GRIP Metal tube

WE MAKE NO COMPROMISES WHEN IT COMES TO QUALITY. QUALITY IS OUR TOP PRIORITY AND IS GUARANTEED BY BOTH OUR STRINGENT IN-HOUSE TESTING AND INDUSTRY CERTIFICATION.

COMMITTED TO QUALITY.

CABLES SYSTEMS.

Member of Professional Chambers of fire protection

Owner of the czech

national award quality Own fire testing laboratory PRAKAB.CZ | MEMBER OF SKB-GROUP

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Czech standard ČSN / International TP PRAKAB standards Cu cable, unscreened

Cable without insulation integrity 1-CXKH-R N2XH (VDE)

Cable with insulation integrity 180 min 1-CSKH-V180 N2XH FE180 (VDE) 1-CXKH-V180

Cable with circuit integrity 30 min (N)HXH FE180/E30 (VDE)

Cable with circuit integrity 90 min (N)HXH FE180/E90 (VDE)

Cu cable, screened

Cable without insulation integrity N2XCH (VDE)

Cable with circuit integrity 30 min (N)HXCH FE180/E30 (VDE)

Cable with circuit integrity 90 min (N)HXCH FE180/E90 (VDE)

Al cable unscreened

Cable without insulation 1-AXKH-R FRNC-AL-M (HD)

integrity FRNC-AL-S (HD)

HALOGEN-FREE TELECOMMUNICATIONS AND SIGNALLING CABLES

without reaction-to-fire performance class

HALOGEN-FREE TELECOMMUNICATIONS AND SIGNALLING CABLES

with reaction-to-fire performance class according to EN 50399 and 2006/751/EC

HALOGEN-FREE INSTALLATION CONDUCTORS AND CABLES

Czech standard ČSN / International

TP PRAKAB standards

Installation conductor 1-CH-R H05Z-U, -K (HD), H07Z-U, -K, -R (HD)

1-CHA-R H05Z1-U, -K (HD)

H07Z1-U, -K, -R (HD)

Installation cable 1-CXKH-R NHXMH (VDE)

HALOGEN-FREE ENERGY CABLES 0,6/1kV

with reaction-to-fire performance class according to EN 50399 and 2006/751/EC

Czech standard ČSN / International

TP PRAKAB standards

Cu cable, unscreened

Cable without insulation integrity PRAFlaSafe®X N2XH (VDE)

B2cas1d0 Cable with circuit integrity PRAFlaDur®30 (N)HXH FE180/E30 (VDE)

30 min PRAFlaDur®X 30

B2cas1d0

PRAFlaDur®SP 30 NXH FE180/E30 (VDE)

B2cas1d0 Cable with circuit integrity PRAFlaDur®90 (N)HXH FE180/E90 (VDE)

90 min PRAFlaDur®X 90

B2cas1d0 PRAFlaDur®SP 90

Cu cable, screened

Cable without insulation PRAFlaSafe®XC N2XCH (VDE)

integrity B2cas1d0

Cable with circuit integrity PRAFlaDur®C 30 (N)HXCH FE180/E30 (VDE)

30 min PRAFlaDur®XC 30

B2cas1d0

N2XCH FE180/E30B2cas1d0 Cable with circuit integrity PRAFlaDur®C 90 (N)HXCH FE180/E90 (VDE)

90 min B2cas1d0

Al cable unscreened

Cable without insulation PRAFlaSafe®AX FRNC-AL-M (HD)

B2cas1d0

integrity FRNC-AL-S (HD) B2cas1d0

HALOGEN-FREE ENERGY CABLES 0,6/1kV

without reaction-to-fire performance class

Czech standard ČSN / International TP PRAKAB standards Cable without insulation integrity, PRAFlaCom®F J-H(St)H…Bd (VDE)

screened B2cas1d0

Cable with circuit integrity PRAFlaGuard®F JE-H(St)H…Bd 30 - 90 min, screened PRAFlaGuard®SPF FE180/E30-E90 (VDE)

PRAFlaGuard®(St) E90

B2cas1d0

Czech standard ČSN / International TP PRAKAB standards Flexible cable, unscreened, oil-resistant HSLH (STN)

Flexible cable, screened, oil-resistant SHTFH-R HSLCH (STN)

Cable without insulation integrity, SHKFH-R J-H(St)H…Bd (VDE) screened

Cable with insulation integrity SSKFH-V180 J-H(St)H…Bd FE180 (VDE) 180 min, screened

Cable with circuit integrity JE-H(St)H…Bd FE180/E30-E90 (VDE) 30 - 90 min, screened

Figure

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References

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Related subjects : Fire Hazard