Protectowire CTITM Confirmed Temperature Initiation Linear Heat Detectors0 pages

Protectowire CTI Confirmed
Temperature Initiation Linear Heat
Detectors
TM

Features
• Digital operation with short circuit discrimination
capable of distinguishing between short circuit and
alarm conditions.
• Two distinct heat sensing technologies.
• Confirmed temperature initiation for highest immunity
to nuisance alarms.
• Compatible with Protectowire Alarm Point Location
Meter.
• Withstands a wide range of environmental conditions.
• Available in five alarm temperatures to accommodate the
widest range of applications.

Description
The Protectowire family of Confirmed Temperature Initiation
Linear Heat Detectors, are advanced multi-criteria detectors consisting of models with alarm temperatures ranging from 155°F (68°C)
to 356°F (180°C). Each Detector is comprised of two special metallic alloy conductors individually insulated with a heat sensitive polymer. The insulated conductors are twisted together to impose a
spring pressure between them, then wrapped with a protective tape
and finished with a durable flame retardant outer jacket.
The Detectors are fixed temperature digital sensors that are capable
of initiating an alarm signal once their rated activation temperature
is reached. At the rated temperature, the heat sensitive polymer
insulation yields to the pressure upon it allowing the conductors to
move into contact with each other thereby creating a short circuit
temperature measuring junction point. The associated zone control
module is designed to detect a short circuit and enter a heat measuring thermocouple mode. By entering the thermocouple mode, the

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control module is able to identify the temperature at the short and
determine the type of off-normal condition being created based
upon the alarm temperature threshold of the Detector.
If the interface control module determines that the temperature at
the short is above the predetermined alarm threshold temperature,
the module initiates an ALARM condition and displays the location of the alarm if equipped with the Protectowire Alarm Point
Location Meter. If, however, the control module determines the
temperature is below the alarm temperature threshold, it initiates a
short circuit fault or TROUBLE condition and displays its location
on the Protectowire Alarm Point Location Meter (if provided) so it
can be corrected. The Protectowire advanced multi-criteria detectors are the first digital type linear heat detectors to provide true
confirmed temperature initiation and mechanical short circuit discrimination. They provide stable linear temperature response with
verified alarm temperature confirmation for exceptional false alarm
immunity.

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