Surge Protector for Dry Contact Relays
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 250Vcording to the Insurance Information Institute, State Farm©.
Dry Contact Relays 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 Electromechanical Relay is used to provide an electrical connection between two or more points in response to the application of a control signal in control systems applications found in refrigeration, HVAC, compressed air systems, 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 1449 Surge Protective Device (SPD) to efficiently protection your digital outputs and increase its reliability.
Protection Point for
Dry Relay Contacts
Based on the built-in withstand of the equipment, Dry Relay Contacts can be protected using the SPD shown below :
| Location | Equipment | System | Surge Protector Model # | Link |
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 | Dry Relay Contact | 12-24Vdc 12-24Vdc | DS220S-24DC |
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| 24-48Vac 24-48Vdc | DS230S-48DC |
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| 12-127Vac 12-180Vdc | DS240S-120 |
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| 130-250Vac 180-300Vdc | DS240S-230 |
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| 277-380Vac 300-510Vdc | DS240S-400 |
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Contact us to develop a surge mitigation solution for your application
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| 10108 USA Today Way Miramar, FL 33025 USA |
