Common Problems / Critical Areas

Common Problems

• Overloaded circuits
• Code violations
• Poor power quality
  • Harmonics affecting critical systems caused by
    • Computers
    • Electronic lighting ballast
    • Variable speed drives
    • Welding
    • Electrical Discharge Machinery
    • Laser Cutting
    • Controllers/PLCs
• Improper grounding due to:
  • The addition of new, automated machinery and equipment
  • Original electrical infrastructure was not designed for current uses
  • Non adherence to the National Electric Code and/or IEEE 1159-1992 standards which are recommended practices for grounding of sensitive electronic equipment
• Harsh environment
  • Electrical equipment should be de-energized, cleaned, tightened, and lubricated on a regular basis.
  • Oil misters, coolants, metal filings, powdered metal dust, carbon, carbide, graphite, etc., infiltrate electrical components, which can cause tracking
• Heavy energy usage:
  • This generates excessive amounts of heat that causes connections to loosen due to shrinkage and expansion.  Loose connections cause arcing that generates extreme heat and high resistance, which is a major safety concern and also results in an ineffecient use of power
• Budget constraints
• Maintenance department has many responsiblilities
• New tenants renovation affecting facility infrastructure

Critical Areas

• Incoming Service
• Main transformer(s) oil & dry
• Bus duct
• Production and manufacturing areas
• Data collection centers

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