Description
Linear Heat Detection LHD Termination Unit – Overview
Linear Heat Detection (LHD) is a continuous heat detector in the form of a cable. It can detect heat at any points along its entire length. Linear Heat Detector is composed of Linear Heat Sensing Cable (LHSC), adapter unit and termination unit. The digital LHSC is composed of two twisted shield conductors insulated with a heat sensitive material, then wrapped with a protective tape and finished with an outer jacket. The heat sensitive material will soften and fuse at specific fixed temperature which causes the contact of the conductors, the short circuit will trigger an alarm to the Fire Alarm Control Panel (FACP), thus realize the function of fire detection and warning. Termination unit is used to balance the signal status and conduct the alarm and fault test.
Technical Specification
| LHSC Type | Conventional type: DHI-HY-TSC-40DA CR/OR type: DHI-HY-TSC-40DA-CR/OR EP type: DHI-HY-TSC-40DA-EP |
|---|---|
| LHSC Alarm Temperature | 68°C, 88°C, 105°C, 138°C |
| Responding Time | 68°C & 88°C: ≤ 10 s 105°C: ≤ 15 s 138°C: ≤ 20 s |
| Operating Temperature | −45°C to +60°C (−49°F to +140°F) |
| Operating Humidity | ≤ 95% RH (no condensation) |
| Protection | IP66 |
| Casing Material | Aluminum Alloy |
| Dimensions | 127 mm × 85 mm × 52 mm (5″ × 3.35″ × 2.05″) |
| Net Weight | 310 g (0.68 lb) |
| Gross Weight | 339 g (0.75 lb) |
| Certifications | UL, CE |
