Field glossary

VPR

Voltage protection rating, the let-through voltage during a standard surge; lower clamps tighter

Used across 2 Anvilfield field guides, most in Electrical.

Also defined as

Datacenter: Voltage protection rating, the SPD let-through voltage under the UL 1449 6 kV, 3 kA combination wave, rounded to a standard value
Datacenter: Voltage protection rating, the let-through under the UL 1449 combination wave; lower is better

Where this shows up