Noisy ground prevents your equipment from operating reliably and properly, causing lockups, malfunctions, and producing artifacts in A/V equipment.  OnFILTER' patented DIN rail ground EMI filter GLV30-1 for control panels and alike blocks high-frequency currents on ground while complying with the safety requirements.  It is highly effective, easy to install, and maintenance-free.  Suitable for UL508A panels. Patented. Made in U.S.A.