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Capital Electric Supply offers external load center SPDs that don't require unnecessary power, so you can stay focused and safe on the job site. Installation is a breeze with the external load center SPD’s pre-assembled panels and plug-and-play cables. The SPD provides protection against surges in the electrical system, which can be caused by lightning strikes, utility switching or other power disturbances. This offers high accuracy for more stable control of your critical processes. Clear LED displays with 10 million cycles of mechanical durability provide a simple way to monitor your pressurized fluid circuit's current value and threshold.