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Why Improper Cooling Selection Causes Heavy Losses

Why Improper Cooling Selection Causes Heavy Losses

2026-06-05

Heat generation from internal electric components inside cabinets is normal, yet accumulated heat brings hidden risks. Long-term overheating cuts the service life of circuit breakers and contactors by half; variable frequency drives (VFDs) will trigger overheat alarm and shut down directly.

Core rule for cooling selection: Calculate total heat load first before picking cooling type.

berita perusahaan terbaru tentang Why Improper Cooling Selection Causes Heavy Losses 0

Four Heat Dissipation Solutions & Application Range
Solution Applicable Heat Load Working Principle
Natural Ventilation (perforation/louver vent) ≤200W Rely on natural thermal convection; low protection rating ≤IP30
Forced Ventilation (axial cooling fans) 200～500W Matched intake & exhaust fans with dust filter screens
Heat Exchanger 500～1500W Isolated internal/external air circulation, maintains IP54; ideal for dusty & corrosive surroundings
Cabinet Air Conditioner ≥1500W Active refrigeration; for high-power VFD cabinets & outdoor enclosures
Three-step Selection Procedure
  1. Calculate total heat dissipation: Sum up power loss of all installed devices including breakers, contactors, VFDs and transformers with respective loss coefficients.
  2. Evaluate installation environment
    • Clean indoor space: Prioritize forced fan ventilation
    • Dusty/oily ambient: Start with heat exchanger as minimum option
    • Outdoor installation or extreme high heat load: Adopt industrial cabinet air conditioner
  3. Match required IP rating: Drilled ventilation holes downgrade enclosure protection rating; cabinets requiring high ingress protection must use heat exchangers or cabinet air conditioners only.