Answer:
The cable is built with a twisted pair of low-resistance tri-metallic cores encased in heat-sensitive polymer insulation, protected by a red polypropylene outer jacket tested to 1 kV breakdown voltage.
The Honeywell System Sensor SS-LD-68-155 digital linear heat detection cable is engineered for industrial environments including cable trays, cable tunnels, conveyor belts, escalators, and warehouse racking. Its core architecture consists of:
- Conductor Assembly: Twisted pair of sprung, low-resistance tri-metallic conductors under mechanical tension.
- Thermal Insulation: An advanced heat-sensitive polymer jacket encapsulating each conductor. At the rated 68°C (155°F) threshold, this polymer softens and melts, allowing the sprung conductors to short-circuit and signal an immediate alarm.
- Outer Sheath: General-purpose red polypropylene jacket with a 1 kV tested protective outer coat for mechanical and electrical shielding.
- Operational Mechanism: Digital, non-restorable detection at the point of thermal shorting; following a heat event, the damaged segment is cut and spliced using approved junction boxes.
