In facility-wide suppression, TVSS units need to be coordinated in a(n) ___ approach.

• A. Linear
• B. Overhead
• C. Staged
• D. Series

Answer: (C)

TVSS coordination in a facility-wide suppression plan is best achieved with a staged approach. By placing multiple suppressors at different points in the electrical system and configuring them to activate at progressively higher surge levels, protection is layered. The first stage handles smaller transients, reducing the likelihood that minor events trigger larger devices unnecessarily; if a bigger surge comes along, the next stage engages, sharing energy dissipation and preventing over-stressing any single unit. This arrangement helps protect equipment across the distribution path while minimizing nuisance clipping and voltage disruption to normal operation. The other terms don’t describe how protection devices are organized in buildings; staged coordination is the standard method for effective, multi-level surge protection.