ESP SL30L/4-20 & ESP SE30/4-20 Series

The ESP SL30L/4-20 & ESP SE30/4-20 Series are a combined Category D, C, B tested protector (to BS EN 61643) suitable for twisted pair 4-20 mA loop systems with innovative LED protector status indication.

For use at boundaries up to LPZ 0 to protect against flashover (typically the service entrance location) through to LPZ 3 to protect sensitive electronic equipment (e.g. transmitters, monitors, controllers).

Features & benefits

Very low let-through voltage (enhanced protection to IEC/BS EN 62305) between all lines - Full Mode protection
Full Mode design capable of handling partial lightning currents as well as allowing continual operation of protected equipment
Repeated protection in lightning intense environments
Innovative LED indication of protection status provides easy visual checking and quick maintenance
ESP 30SE/4-20 (6.2 mm) and ESP SL30L/4-20 (7 mm) are ultra slim units, ideal for compact protection of large numbers of lines (e.g. process control installations)
ESP SL30L/4-20 includes two stage removable protection module with simple quick release mechanism allowing partial removal for easy line commissioning and maintenance as well as full removal for protection replacement
Very low (1 Ω) in-line resistance for minimal system interference
Screen terminal enables easy connection of cable screen to earth. Note: ESP SL30L/4-20/I is suitable for earthed and isolated screen systems
Strong, flame retardant, polycarbonate housing
Built-in innovative DIN rail foot with locking feature for simple positioning and clip-on mounting to top hat DIN rails
Convenient earthing through DIN foot and/or earth terminal
ESP 30SE/4-20 (and /PT variant) have colour coded terminals for quick and easy installation check
ESP 30SE/4-20 available with Push Terminals (ESP 30SE/4-20/PT) for simple 'spring' connections, to provide fast and reliable cable termination
Innovative self resetting design protects SPD against abnormal 4-20mA loop overcurrent faults