9. MOV Technology Explained · Page 3 of 5
Leakage Current and Heat
Why ventilation and Uc selection matter in hot climates.

Ambient temperature
Middle East and tropical plant rooms can run very hot. High ambient plus leakage increases thermal stress.
Enclosure design
Do not bury SPDs in unventilated pockets next to heat sources. Follow manufacturer ambient limits.
Grid swell
Sites with frequent voltage swell need careful Uc selection to avoid accelerated aging.
