9. MOV Technology Explained · 第 5／5 頁
What MOVs Can and Cannot Do
Set correct expectations with clients and operators.
Can do
Clamp most lightning-induced and switching surges on LV power circuits when correctly applied.
Cannot do
Replace earthing design, fix chronic TOV from lost neutral, or protect against long-duration swells like a regulator would.
Communication tip
Explain SPDs as "airbags for electrical transients"—essential, sacrificial, and inspectable.