Can dry ice clean live MV switchgear without shutdown?
Yes — under your safety case, with appropriate PPE and procedures.
Verdict
Yes — with care
Site-specific safety case + qualified HV operator coordination required.
The detailed answer
Live MV switchgear cleaning is a specialist dry ice application. Procedures: permit-to-work, electrical authority sign-off, arc-rated PPE, hot-stick technique, IR test before/after. CO₂ pellets are non-conductive — there's no path created. Insulation resistance preserved (and often improves as accumulated dust is removed). Per-asset photo log + IR test sheet produced for asset register. Annual maintenance contracts standard with utilities and large industrial sites.
Related questions
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