Surge Protection for Dual Thermocouple

Surge Protection for Dual Thermocouple

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OVERVIEW

Today’s increased reliance on very sensitive electronics makes surge protection an important topic for most industries. The Insurance Institute for Business & Home Safety study found that $26 billion dollars was lost due to non-lightning power surges. In addition, there are about 25 million lightning strikes in the US each year that cause between $650M to $1B in losses according to the Insurance Information Institute, State Farm©.

Thermocouples are a key component of any UL 508A control panel (also known as an Industrial Control Panel or ICP). However, they are usually overlooked due to their limited cost in the overall system yet are integral parts that can lead to costly and disruptive downtime. The Thermocouple is used to measure temperature in applications found in food processing, refineries, chemical plants, power plants as well as commercial, industrial, residential and manufacturing process applications. They are the critical components in the process loop and are sensitive to transient over voltages.

This section will identify the UL 497B Surge Protective Device (SPD) to efficiently protection your thermocouple and increase its reliability.

Protection Point for
Dual Thermocouple Temperature Sensors

Based on the built-in withstand of the equipment, most of the temperature probes can be protected using the SPD shown below :

LocationEquipmentSystemSurge Protector
Model #
Link
Alt textDual Thermocouple
Input
4-20mA
(2-pair wire)
DL2A-24D3 DLA-24D3
Alt textTransmitter
Analog Input
4-20mA
Current Loop
3 or 4-wire
DLA2-24D3 DLA-24D3
Transmitter
Analog Output
4-20mA
Current Loop
3 or 4-wire
DLA2-24D3 DLA-24D3
Transmitter
DC Power Input
24V DCDS220S-24DC DS220S-24DC
Alt textPLC
Analog Input Card
4-20mA
Current Loop
3 or 4-wire
DLA2-24D3 DLA-24D3

Contact us to develop a surge mitigation solution for your application

Where to purchase Citel SPD's

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