1. Alarmline Linear Heat Detection For Storage Tank Protection

2. 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

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

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

5. 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

6. 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

7. 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

8. 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.

9. 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

10. 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)

11. 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.

12. 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

13. 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

14. 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

15. 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

16. LHS Digital Cable Construction

17. 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

18. Analogue & Digital Comparison

19. International Approvals
Alarmline Analogue
Alarmline Digital
UK power generation
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
- EPA 206/220
Factory Mutual
- OD 6A9.AY
Chinese Fire Officers
- MAAL 96652

20. Typical Alarmline Digital Cable Schematic Diagram
R2 Series Resistor 1 1 1 R2
2 Core cable 2 2 B
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

21. 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

22. Detail showing typical collector installation

23. Cable Collector

24. 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

25. 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

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

27. 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

28. 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 Mexico
SRC Singapore Refinery Analogue/Digital 3 Singapore
Shell Sakhalin II Analogue 2 Russia

29. 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.

30. 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.