Surge protection for NEMA systems

VAL-US represents the world's largest selection of UL “Open Type” Listed surge protective devices (SPDs). “Open Type”, also referred to as “Open Terminal”, refers to a category of surge protective devices newly introduced in UL 1449. This new category allows DIN-rail-mountable SPDs to obtain UL Listed approval. As the VAL-US series has UL Open Type 1 Listed approval, this makes acceptance testing of installations and systems much easier for inspectors.

The VAL-US product line includes pluggable surge protective devices for installations and systems in North America and Mexico. These items are also used in regions where NEMA-compliant supply system configurations are used. The intelligent design of these plugs features a window with a visual status indicator. This means you can identify overloaded plugs directly on site. A remote indication contact is available for remote maintenance. The base element and corresponding plug are coded to one another. This prevents incorrect replacement or tampering during maintenance work. The VAL-US series consists of numerous circuit configurations, both for standard systems such as 120/240 V split-phase and 277/480 V wye, and also for special supply system configurations such as 120/208/240 V high-leg delta and corner-grounded delta.