Surge Protection for Solenoids

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©.

Solenoids 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 Solenoids is used to provide lineal actuation for valves and relays 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 497B Surge Protective Device (SPD) to efficiently protection your Solenoids and increase its reliability.

Protection Point for
Solenoids

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

Location	Equipment	System	Surge Protector Model #	Link
	ACTUATOR DC SOLEDNOID	24VDC < 300mA	DLA-24D3
		24VDC < 300mA Slim Profile	DLC-24D3
		24VDC < 2.4mA	DLAH-24D3
		24VDC 40A Max.	DS220S-24DC
	ACTUATOR AC SOLEDNOID	120VAC 40A Max.	DS240S-120
		250VAC 40A Max.	DS240S-230

Test Videos for Solenoids