Fire Survival Cables Designed for Critical Installation of National Importance Airports / Thermal Power Plants Metro Rail Projects / Rail Terminals / Nuclear Interstate Bus Terminals / Installation Prone to Fire
Havells Fire Survival Cables Introduction Need of ensuring safe operation of critical circuits is essential in today s installations. Normal cables used in such installations render useless in fire incidences. At Havells, your safety is our concern. Havells has now developed special type Fire Survival Cables through research. These cables - also known as CIRCUIT INTEGRITY CABLES & are designed to sustain the high temperatures for a defined minimum period of time under direct fire. These cables are useful to maintain their integrity during the defined period of fire. The construction of these cables is different if compared with ordinary cables. The conductor is manufactured with a specially designed heat barrier and fire resistant insulation which resists the fire to reach conductor surface. The cable continues to remain into operation at high temperatures like 650 C, 750 C and 950 C as per various conditions of operation and applications. Wires offering same properties are also available. Specification These cables are manufactured and tested in accordance with BS 7846, IS 7098(P-1), IEC 69331 and BS 6387 for required temperatures and duration - depending upon the application of cable and site conditions. Constituents HAVELLS FS CABLES are manufactured with the following materials. 1. Annealed Plain Copper Conductor 2. Heat Barrier Over the Conductor 3. Cross Linked Polyethylene 4. Galvanised Steel Armour 5. Zero Halogen & Low Smoke Compound The ZHLS compound ascertains the least smoke and hence increased light transmission during burning of cables. The circuit integrity of HAVELLS FS cables at high temperatures remains unaltered for the required time period as per the specification defined. Constructions Conductor made of high conductivity annealed plain copper Insulation fire resistant cross linked polyethylene Armour galvanised steel Heat Barrier high temperature sustaining tape Inner Sheath Zero halogen & low smoke compound Outer Sheath Zero halogen & low smoke compound Test Requirements HAVELLS CIRCUIT INTEGRITY CABLES are tested in accordance with IEC 60331, IEC 60332-1, IEC 60754-1, ASTMD 2863 & 2843, BS 7846 and BS 6387 for the following properties. 1. Fire Resistance Test 2. Smoke Density Rating 3. Halogen Gas Emission Test 4. Oxygen Index Test 5. Flammability Test As Per Swedish Chimney Special Properties HAVELLS FS cables are designed with the following special properties which make the cable excellent in the fire conditions. 1. Circuit Integrity under fire at high temperature 2. Enhanced Current Carrying Capacity due to high permissible conductor temperature 3. Higher Short Circuit Capacity 4. Lighter in weight hence easy to handle and installation 5. Reluctant to Overheating 6. High Oxygen Index refrains the cable from spreading the fire 7. Low smoke density reduces the environmental opaqueness during fire 8. High degree of light transmission in the event of fire 2
Havells Fire Survival Cables 9. No chance of emission of Halogen Gases safe for humans 10. Negligible emission of Toxic and Corrosive gases - diminishing the chance to damage the human body/sensitive equipment Test Certificate For Havells Fire Survival Cables Description of cable: HAVELLS FIRE SURVIVAL CABLE Ref spec:bs 6387, IEC 60331 S. No. Description of Test Specified Requirement Observation 1. Fire Resistance Test i) Resistance to fire at a temperature of 750 C Cable should withstand the circuit integrity Withstood Time period required - 3 Hours 12 hours after the above, re-energise the cable Cable should withstand the circuit integrity Withstood ii) Resistance to fire at a temperature of 950 C, category C Time period required - 3 Hours Cable should withstand the circuit integrity Withstood iii) Resistance to fire at a temperature of 650 C with water spray, category W Time period required - 30 minute iv) Resistance to fire at a temperature of 950 C with mechnical shock, category Z Time period required - 15 minute 2. Tests on outer sheath Remarks: The cable meets the requirement of fire resistance tests as per specification. Cable should withstand the circuit integrity Cable should withstand the circuit integrity Withstood Withstood i) Oxygen index test (as per ASTM-D-2863) Min - 29% 34.5% ii) Temperature index test (as per ASTM-D-2863) Min - 250 Deg C 425 Deg C iii) Smoke density rating (as per ASTMD -2843) Max 20% 9.5% iv) HCL gas emission Test (As per IEC 60754-1) Less than 0.5% 0.35% Fire resistance - Circuit Integrity - Reference Standards The first tests on fire resistance cables were only providing the presence of flame, for example for IEC 60331 standards, for a period of 180 minutes at a temperature of 750 C. Subsequently the test conditions have been extended, by changing the duration, by increasing the temperature of the flame and by adding mechanical stress and water sprays. These modifications allowed to better simulate the real fire conditions, with mechanical stresses due to the fall of materials and with the presence of water for the putting out of the same. The standard BS 6387 has been introduced by keeping that into consideration: it was providing three tests on three different cable samples: one only with the flame, up to 950 C (cat. C), one with the flame and water spray (cat. W), one with the flame and mechanical stresses (cat. Z). Fire resistance test as per IEC 60331 The test is carried out on the cable operational on load and burning at a temperature of 750 Deg C for 3 hours. The cable is put on the clamps above the fire burner of high flames. The power supply is connected to one end of cable at rated voltage and the load is connected to other end. Fire applied for 3 hours and during this period, the circuit integrity must be uninterrupted. After the 3 hours, the fire and power is switched off. The cable should report as usual when energised again after a gap of 12 hours. 3
Havells Fire Survival Cables The test, originally carried out only in presence of fire, now also stresses the cable with mechanical shocks. In details, the standard is subdivided in several parts: IEC 60331-1 ed1.0 (2009-05) - Part 1: Test method for fire with shock at a temperature of at least 830 C for cables of rated voltage up to and including 0,6/1,0 kv and with an overall diameter exceeding 20 m IEC 60331-2 ed1.0 (2009-05) - Part 2: Test method for fire with shock at a temperature of at least 830 C for cables of rated voltage up to and including 0,6/1,0 kv and with an overall diameter not exceeding 20 mm IEC 60331-3 ed1.0 (2009-05) - Part 3: Test method for fire with shock at a temperature of at least 830 C for cables of rated voltage up to and including 0,6/1,0 kv tested in a metal enclosure IEC 60331-11 ed1.1 Consol. with am1 (2009-07) - Part 11: Apparatus - Fire alone at a flame temperature of at least 750 C IEC 60331-21 ed1.0 (1999-04) - Part 21: Procedures and requirements Cables of rated voltage up to and including 0,6/1,0 kv Fire resistance test as per BS 6387 BS 6387:1994 - Specification for performance requirements for cables required to maintain circuit integrity under fire conditions. This can be defined as the historical standard for fire resistance cables since in many countries it is still the most widespread one. It has been the first to include also mechanical stress and water action in the fire resistance test of electric cables. The cables can be tested in different conditions, but most commonly required are: Cat C - test with flame at 950 C for 180 minutes. Cat W - test with flame for 15 minutes and flame and water for further 15 minutes at 650 C. Cat Z - test with flame and mechanical shocks for 15 minutes at 950 C. Behaviour to the fire of the electric cables The behaviour of the electric cables in case of fire can be evaluated according to various aspects: Fire resistance - Non propagation of fire - Emission of fumes and acid gases The first aspect can be considered as active since the cable continues to perform its main function: transmit power and signals even during the fire. The other characteristics can be defined as passive, but of primary importance, by limiting the fire propagation and by reducing fumes and gases that are developed by the combustion and that cause severe damages and human lives losses. It must be considered, in fact, that most commonly identified causes for death from a fire incident are due to gas or smoke. Fire resistance Fire resistance means that the cable or the installation where the cable is installed is capable to continue to operate even in case of fire for a specific period of time (from 30 to 180 minutes). Circuit Integrity (or Insulation Integrity) which indicates tests exclusively referred to cables. Reaction to fire propagation Cables can be a critical vehicle for the fire transmission since they run for long tracts, even in vertical ducts that could behave as chimneys and therefore propagate the fire even in other areas. HAVELLS uses high self-extinguishing materials and realizes constructive solutions that contrast the flame propagation. Emission of fumes and acid gases HAVELLS always uses LSZH (Low Smoke Zero Halogen) sheaths for its FS cables (unless when specifically prescribed because of special working conditions). This term indicates materials that are properly formulated to guarantee, besides the high self-extinguishing characteristic, also a low emission of clear fumes, without halogens (corrosive gases) and that do not develop toxic gases in case of combustion. 4
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Applications Airport Shopping Mall Refineries Hotel Metro Rail High Rise Building This catalogue is our scrupulous effort to show you our experience, our style & strength of thinking and operating in the manufacturing of fire survival cables. If the specific cable is asked as per different application, we can design it togeather, Please feel free to let us know the specific situation and we shall design the FS Cable accordingly. HAVELLS is the best suitable to create any specific FS Cable. Thank you for calling HAVELLS Cinema / Theatres Stadium Hospital Nuclear Power Plant CAB/ZHCMC00003/MAR14/FEB15 Havells India Ltd. Corp Office: QRG Towers, 2D, Sector-126, Expressway, Noida-201304 (U.P), Ph. +91-120-3331000 Email: marketing@havells.com, www.havells.com Consumer Care No.: 1800 11 0303 (Tollfree), 011-4166 0303 (Landline), 1800 103 1313 (All Connections) Join us on Facebook at www.facebook.com/havells and share your ways to save the planet! Corporate Identification Number (CIN) - L31900DL1983PLC016304.