Introduction
The document provides technical specifications and applications for Cavicel's Linear Heat Detector Cables (HDC), which are designed for fire detection and alarm systems. These cables are compliant with EN 54-28 standards and are suitable for various industrial applications.

Specifications
The HDC cables are continuous heat detectors that detect heat along their entire length. They consist of two copper-covered steel wires insulated with a thermosensitive polymer. When the rated temperature is reached, the insulation melts, causing a short circuit that triggers an alarm. The cables are available in four temperature alarm levels: 68°C, 88°C, 105°C, and 138°C. Key specifications include:

• Outer sheath colors: Red, White, Black, Blue
• Conductor: Copper-covered steel wire, diameter 0.95 mm
• Insulation: Special thermosensitive polymer
• Outer diameter: 4.5 mm
• Weight: 25 kg/km
• Max ambient temperature: 40°C
• Voltage rating: 100 V d.c.
• Conductor resistance: 300 Ω/km at 20°C
• Dielectric test: 500 V ac for 1 minute
• Water and oil sheath resistance: Good
• Flame propagation: IEC 60332-1/VW1/FT1
• Fire reaction: CPR Eca - EN 13501-6
• RoHS II 2011/65/EU and CE 2014/35/EU compliant

Features and Benefits
The HDC cables offer several advantages, including ease of installation and maintenance, fast substitution of shorted circuit cable sectors, suitability for dangerous or difficult-to-access areas, short response times, minimal false alarms, and simple integration with fire extinguishing systems.

Applications
The cables are suitable for a wide range of applications, including:

• Pipelines
• Storage Tanks
• Cable Trays
• Aircraft Hangars
• Control Rooms
• Warehouses
• Bridges and Tunnels
• Mines
• Cooling Towers
• Escalators

Contact Information
Headquarters and factory are located in Pioltello, Italy, with additional offices in Dubai and Hong Kong. Contact details are provided for each location.

Conclusion
Cavicel's HDC cables are reliable and economical tools for monitoring abnormal heat increases, often a preliminary stage of a fire event. They are designed to meet international safety standards and are suitable for various industrial environments.