ProReact Fixed Activation

Thermocable had to introduce hardware and software modifications to its existing ProReact Digital LHD range in order to meet the requirement of EN54-28. As a result, these two systems are materially different and are not cross-compatible. I.e., you cannot use ProReact Digital LHD cable with a ProReact Digital Sensor Control Unit (DSCU).

An unintended consequence of making these changes is the reduction in maximum zone length per zone of detection cable. This is 1,000 metres per zone for the ProReact EN Digital LHD system. However, please note that two zones of detection cable can be connected to a single ProReact Digital Sensor Control Unit.

The ProReact EN Digital LHD cable (various alarm temperatures available), the ProReact Digital Sensor Control Unit (DSCU) and the ProReact Digital End of Line Unit (EOLU) are all listed as components on the system approval certificate.

They provide a technical basis to assess the performance of construction products and they enable manufacturers to draw up declarations of performance and affix CE and UKCA marking. Products that are resistant to fire or react to fire fall under the definition of construction products in the European Union.

All Thermocable’s ProReact Digital Linear Heat Detection Cable has a minimum ambient operating temperature of -40⁰C (-40⁰F) and can operate between 0-100% relative humidity.
Please find the recommended maximum ambient operating temperatures below:

Functional testing of digital linear heat detection by heating a section of cable up until an alarm is initiated is an effective method but can be costly as the section of cable must be replaced following the test.

Alternatively, it is possible to undertake a test using Thermocable's ProReact Digital EOL unit with Test Facility (SKU: A1385). This unit allowed a functional test to be carried out on the zone of digital LHD cable to verify normal, trouble and alarm functions of the system by simulating a break in the cable or a overheat condition.

Please get in touch with us if you require further clarification on testing a digital linear heat detection system.

Low smoke zero halogen cables are being increasingly specified and used in environments where smoke and harmful emissions released in the event of a fire could endanger human life. ProReact Plus Digital LHD cable is a low smoke zero halogen, UV stable and hydrocarbon resistant alternative to traditional digital linear heat detection cable.

Thermocable typically supplies its ProReact Digital Linear Heat Detection cable on its standard reel lengths of 100m, 200, 500m or 1,000m where available. Alternatively, non-standard lengths can be supplied at an additional cost on request.

This detection cable is available in 100 metre, 200 metre or 500 metre reel lengths as standard. Non-standard lengths can be supplied but will incur a small surcharge. Please note that the maximum available reel length is 500 metres per spool.

Please find a summary of the compatibility by material below. More information can be supplied on request.
PVC is resistant to ammonia, copper nitrate, fuel oil and diesel fuel
Nylon is resistant to butane, fuel oils, gasoline, methyl ethyl ketone, diesel, ethyl alcohol and ethanol
Polypropylene is resistant to ammonia, copper nitrate, hydrofluoric acid, diesel and acetic acid
Stainless Steel is resistant to ammonia nitrate, , butane, copper nitrate, fuel, gasoline, methyl ethyl ketone, diesel, ethyl alcohol and ethanol

The low smoke zero halogen outer coat has good resistance against ammonia, copper nitrate, hydrofluoric acid and acetic acid.

Please contact us if you have a question on the chemical compatibility of this material.

Yes, all Thermocable's control or interface units require a 24V power supply.

Thermocable has referred to the colour coding for heat detectors within NFPA 72 when designing its products. The colour of its ProReact Digital Linear Heat Detection cable is as follows:

Alarm temperature of 79⁰C and below – Red
Alarm temperature between 80⁰C and 121⁰C – White
Alarm temperature between 122⁰C and 162⁰C – Blue
Alarm temperature between 163⁰C and 204⁰C – Red
Alarm temperature between 205⁰C and 259⁰C – Green

An optional black nylon outer coat and / or a stainless steel outer braid can be added to the majority of our detection cables.

Operating Voltage Range – 0-30Vac, 0-42Vdc
Resistance – Approx. 100Ω/km (30.4Ω/kft) per leg
Velocity of Propagation – Approx. 55%
Capacitance – 88 – 150pF/m
Inductance – 540 – 1050nH/m