VPU AC Surge Protection

Weidmüller VPU I (Type I), VPU II (Type II) and VPU III (Type III) surge protection products effectively reduce the interference coupling that can occur due to transient surge voltages, even significantly below the limits prescribed by insulation co-ordination according to EN 60664-3 / DIN VDE 0110-3. This means that the whole installation is exposed to fewer malfunctions.

Designed for renewable energy systems, machinery, process industries, and building infrastructure, the VPU surge protection series combines high performance with an outstanding price-to-performance ratio. The National Electrical Code (NEC) requires SPD installation on service entrances for dwelling units, dormitories, and similar spaces (Article 230.67) and also mandates surge protection for machinery safety circuits, fire pump controllers, emergency systems, and critical operation power systems. The VPU Series line fully supports these NEC requirements, helping compliance and safeguarding installations.

The arresters are coordinated using technical means. This means that decoupling between Types I, II and III is unnecessary. The arresters are tested according to product standard IEC 61643-11 / DIN EN 61643-11 and can be installed in systems according to IEC 61643-12 / VDE 0675-6-12 and IEC 62305-4 / VDE 0185-4. This lightning and surge protection device is suited for installation in power supply systems. Weidmüller offers different products depending on the mains network type and voltage level. A special Type I and Type II protective device is even available for photovoltaic applications.

Resources

• Global Lightning and Surge Protection Catalog
• US Line Lightning and Surge Protection Brochure
• Surge Protection Quick Selector