UNDERGROUND CABLE TRAY TUNNELS

A relatively minor cable fire can cause widespread disruption and consequential losses out of all proportion to the incident itself. In factory, cables run in the cable trays. Some have underground tunnels for putting the cable trays in large number. The problem is that such areas rare to be visited. Therefore minor fire can lead to catastrophic disaster which may interrupt the business operation. Protectowire Linear Heat Detector detects the location of an overheat condition anywhere in a plant’s cable tray system. Power and control cables are protected and vital systems are kept in operation.

There are several models can be choosen : PHSC Series, PLR Series, CTI Series with rated temperature choices : 68^oC, 88^oC, 105^oC, 138^oC and 180^oC . To suit with different site and environment conditions, the jacket material of the sensor cable can be choosen :

Flame Retardant Vinyl Outer Jacket (-EPC)

Fluoropolymer Outer Jacket (-XCR)

Jacket material for subzero installation (-XLT)

Low Smoke Zero Halogen (-LSZH)

Check this link for rated temperature and jacket material selection.

There several model of FACP provided by Protectowire, the most common is SRP-4x4, which is a conventional releasing control panel. If the addressable fire alarm panel is used, PIM shall be added to the system (PIM = Protectowire Interface Module) to overcome impedance mismatch problem. There are several models can be choosen :

Single-zone Mini Interface Module (PIM - 120)

Dual-Input Interface Module w/ Display (PIM - 430)

Single-zone Interface Module w/ Analog Output & LCD Display (PIM - 530)

Picture-2 showing JBFA with PIM-430 installation. This type of interface module has (optional) LCD Display to show alarm location, so the "hot spot" can easily located.