Alarmline Linear Heat Detection For Storage Tank Protection

What is Linear Heat Detection? Continuous heat detector in the form of a cable - Alarmline Analogue: averaging heat detector - Alarmline Digital: fixed temperature heat detector

Alarmline Applications Heavy industry Warehousing & Freezer Stores Storage tanks Conveyors and escalators Cable trays Floor & ceiling voids Tunnels Car parks

Floating Roof Storage Tanks Install near primary & weather rim seals. Use Intrinsic Safety Barriers for Hazardous related applications

CABLE COLLECTING ASSEMBLY Schematic diagram Alarmline Linear Heat Sensor Protection JUNCTION BOX WITH CABLE COLLECTING ASSEMBLY RETRACTABLE CABLE JUNCTION BOX RIM SEAL CONTROL CUBICLE LOCATED IN SAFE AREA 4 CORE INTERPOSING CABLE SUPPORT BRACKETS ALARMLINE LINEAR HEAT SENSOR CABLE AROUND RIM SEAL TANK

Alarmline LHD - Wide range of temperature settings. - Wide range of casings & braiding for mechanical and chemical resistance. - Operating range -65º to +200º C - Unaffected by operating environment (Dirt, Dust, Humidity & UV). - Easy to install - Simple to maintain

Analogue LHD Cable Definition: - Multi-conductor cable containing insulators whose insulation resistance varies proportionately to changes in temperature - Re-settable, provided the temperature does not exceed the burn-off point of PVC coating - Alarm temperature is adjusted and set at the controller. - Allows testing without damaging cable

Alarmline Analogue LHD Cables High temperature PVC - standard applications. Nylon extruded - increased chemical resistance. Bronze braided over standard high temperature PVC cable - increased mechanical protection Stainless Steel braided over nylon extruded cable - increased mechanical and chemical resistance.

AlarmLine Construction 4 conductor 0.5 mm diameter copper cable Two conductors for heat sensing Two conductors for continuity monitoring Twisted at 30 turns per foot to cancel potentially high voltage inductance

How Does AlarmLine Work? Sensor cable has negative temperature coefficient insulation Temperature increase lowers cable resistance exponentially PROTECTIVE INSULATION HIGH TEMPERATURE PVC SENSOR COPPER CONDUCTOR WIRE NEGATIVE TEMPERATURE COEFFICIENT (NTC)

Alarmline LHD 4 Controller - Alarm temperature setting adjusted via moveable link. - Open circuit and closed circuit cable fault monitoring. - Direct connection to conventional fire alarm panels (2 wire connection). - Volt-free Fire & Fault relay option for interfacing to other control systems. - Eurocard 19” rack option.

Intrinsic Safety Barriers For Class 1, Div 1, Groups A, B, C, D classified areas Each IS Barrier handles two conductors Use two IS Barriers per sensor cable Use enclosure to insure correct grounding Safe area Hazardous area Alarmline Controller Junction Box IS Barrier

Typical Conventional Application Kidde Control Panel Hazardous Area Junction Box Standard 2 core cable 4 core cables AlarmLine Sensor 2 Wire Interface Module Max (1,000 m) 2 x I.S. Barriers

Digital LHD Cable Definition: - A cable which contains an insulator which melts at a specific temperature - Switch output provided when alarm temperature is reached - Not re-settable. - Operating range -65º to +200º C

Alarmline Digital LHD Cables Polythene braid 155º F (68º C) Nylon over sheath 155º F (68º C) Polythene braid 185º F (85º C) Nylon over sheath 185º (85º C) PVC 221º F (105º C) PVC 345º F (174º C) Fluoropolymer 440º F (227º C) Internal Internal / External / Chemical Internal / External

LHS Digital Cable Construction

Alarmline Digital Control Units Kidde Firebeta conventional panel with optional extinguishant release module All other conventional fire alarm panels and extinguishant release modules (retrofit). Analogue addressable control systems

Analogue & Digital Comparison

International Approvals Alarmline Analogue Alarmline Digital UK power generation - 5117 P 11 - EPA 022/215 Factory Mutual - OB 9A2.AY - OR 5A4.AY Chinese Fire Officers - MAAL 96652 Chinese Power Generation - NSTCFEPQ (Appr) 92005 German VdS (1995) UK power Generation - EPA 019-021 - EPA 206/220 Factory Mutual - OD 6A9.AY - 300 5155 - 300 3834 Chinese Fire Officers - MAAL 96652 - 300 8312 - 300 8933

Typical Alarmline Digital Cable Schematic Diagram R2 Series Resistor 1 1 1 R2 2 Core cable 2 2 B6782-044 to control 3 Retractable Cable Panel LHS Digital (by others) 4 2 Cable R1 3 Fitted to EOL Rim Seal 4 B6782 Junction Box located on Fixed Tank Top B6782 Junction Box located on Note: Resistors R1 & R2 supplied by panel manufacturer and fitted by others Tank Floating Roof

Junction Box Tank Roof Top Typical Connection Diagram Alarmline Analogue Junction Box Tank Roof Top 1 2 3 4 5 6 7 8 Junction Box Tank Top Blue Red White Orange Link 2 Link 1 Retractable Cable 4 Core

Detail showing typical collector installation

Cable Collector

Retractable Cable Number of Cores 4 Core Colours:1 Blue, 2 Brown, 3 Black, 4 Yellow Core Size:0.75mm (24/.2) Core Insulation:Hytrel Inner Sheath:Polyurethane Outer Sheath:Hytrel Lengths:10-25m 230 Nominal 3 4 N o m i n a l 5000 1500

Cable Fixing Rim Seal Retaining Plate 3 2 1 4 6 5 Junction Box Tank Wall Interconnecting 4 Core Cable to Tank Ladder or Retractable Cable Rim Seal Retaining Plate 1. Edge Clip 2. M6 Nut, washer & bolt, St.St. 3. Distance piece, St. St. 4. Neoprene sleeve 5. Tywrap 6. Alarmline cable Note: 1. Maximum spacing between supports to be 1000mm 2. Alarm Cable to be terminated directly into Junction Box which is to be secured adjacent to Rim Seal Protector Plate 400mm (NTS) Tank Wall 200mm

Typical Application without Foam Dam Alarmline Sensor Weather Seal Tank Wall Floating Roof Retractable Cable to Tank Top Junction Box Earth Strap Tank Top

Fixed Roof Storage Tanks Install AlarmLine at top of tank and at intervals on outer shell using support cables or attached to water cooling pipes. Install Alarmline near vents and flanges Use Intrinsic Safety Barriers for Fuel related applications

Reference List Company Location Cable Type Qty Country Elf Flotta Oil Terminal Analogue 7 UK B.P. Grangemouth Analogue 25 UK Shell Gabon Refinery Analogue 3 Gabon Reliance Jamnagar Analogue 86 India Adnoc Mussafah Oil Terminal Digital 7 U.A.E. PVDSA Bariven SA Refinery Digital 6 Venezuela Adnoc Ruwais & Uan Refineries Analogue 14 Qatar Nodco Nodco Refinery Digital 8 U.A.E. Shell Bonney Terminal Digital 2 Nigeria CNPC Fula Field Digital 4 Sudan Sinopec Neka Digital 6 Iran Pemex Medero Refinery Analogue 12 Mexico SRC Singapore Refinery Analogue/Digital 3 Singapore Shell Sakhalin II Analogue 2 Russia

Alarmline Nomogram - Mark the Max Temperature - Select the sensor cable length being used (D)100m - Mark the Max Temperature where an alarm must not be given (B) 45 degrees - Draw a line from point on “D” through point on “B” to the switch setting line (A). This is the switch setting that will not give a false alarm at the Max ambient temperature.

Alarmline Nomogram -In the event of a hot spot occurring, it can be shown how hot this would need to be to give an alarm for a given length - 10 metre length = 83 degrees - 1 metre length =120 degrees.