Overheat and Fire Detection For Solar Panels

Overheat and Fire Detection For Solar Panels
SPECIAL HAZARD APPLICATION
Overheat and Fire Detection For
Solar Panels
A solar panel works by allowing photons, or particles of light,
to knock electrons free from atoms, generating a flow of
electricity. The use of solar power for both residential and
industrial commercial use is continuously gaining momentum.
As this technology grows in popularity, so has the challenge of
properly protecting these panel installations. Up until now the
most common way to spot a fire on a solar panel is from a
report from a person passing the array. With limited federal or
local regulations for fire detection, solar panels are often left
vulnerable to triggering catastrophic damage.
Solar panel fires are typically caused by short circuits,
maintenance operations, roof debris, animal nests, physical
damage or the panel overheating. Protectowire’s Confirmed
Temperature Initiation (CTI) Series Linear Heat Detector
(LHD) is a fixed temperature detector designed to meet the
detection challenges presented in solar panel installations. The
CTI-X Series requires heat to generate an alarm condition,
physical damage to the detector will not produce an alarm. All
CTI-X Series Linear Heat Detectors have a minimum operating
temperature of -40F (-40C) and are available in a
fluoropolymer jacket that offers superior ultra-violet and
abrasion resistance.The CTI Series Linear Heat Detector is
monitored by a CTM-530 module, this interface module is
compatible with virtually all fire alarm control panels. The
CTM-530 module offers multiple interface options that include
form C relay contacts and two 4-20 mA outputs all designed to
simplify integration into a control panel or building system. Protectowire LHD CTI Series
Solar panels can add significant weight to any roof. Further,
given their close proximity to the roof the rapid spread of heat
or fire is highly probable. Knowing when the roof is potentially
compromised assists occupants and first responders in avoiding
hazardous situations. The Protectowire CTM-530 module has
integrated alarm point location to assist first responders in
determining the hotspot location. Having a fast response time
can mean the difference between a controlled fire situation and
a major recovery operation.
Protectowire LHD CTI Series
An ISO 9001:2008 Registered Company
Zone Map Example Layout - Roof Top Solar Array
Installation Recommendations
The CTM-530 module can supervise a single 4000 ft. (1220 m.)
zone of the CTI-X Series Linear Heat Detector in either a Class A
or Class B configuration. Typically, in solar panel applications the
CTI-X Series Detector is installed along the highest longitudinal
support bar of the metal framework designed to elevate/angle the
solar panel from the roof. Factory recommended stainless steel
mounting clips (OHS-SS) should be used to mount the detector to
the support bars and framework system.
2000 ft.
1000 ft.
100 ft.
J
J *
Heating
and
Cooling
Unit
Zone mapping or recording the linear layout of the CTI-X Series
Detector is essential for identifying a fire location. When an off
normal condition exists, the CTM-530 module will display the
location of the fault or fire. A properly recorded zone map (see
example layout) allows operators or first responders to immediately
correlate the linear footage displayed on the CTM-530 module to
the physical location of the CTI-X Series Detector on the solar
array.
Protectowire CTI-X Series linear heat detector is a component of a
complete family of fire detection systems manufactured by The
Protectowire Company.
J
J
500 ft.
1500 ft.
*Class A optional
Solar Panel
J
Protectowire Linear Heat Detector
Solar Panel Mounting
Junction Box
Linear Heat
Detector
Extension Cable
In Conduit
Clip fastener
every 5 ft. min. (1.5 m.)
Detector is mounted on back of the upper support beams
at the top level and optionally on the lower level.
Protectowire
Linear Heat Detector
Zone
Box
Interposing wiring in
conduit from the control panel
Zone
Box
(Optional)
Interposing wiring in
conduit from the control panel
Copyright © 2016 The Protectowire Co., Inc.
The Protectowire Company, Inc.
60 Washington Street, Pembroke, MA 02359 U.S.A
web: www.protectowire.com
p: 781-826-3878
f:781-826-2045
email: pwire@protectowire.com
SPECIAL HAZARD FIRE DETECTION SYSTEM
DS 9287-1116
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