Technical Document · Power Quality

Steady-State (Continuous) Power Supply Quality Characteristics

Maintaining high-quality steady-state power is vital for the reliable operation and longevity of industrial equipment. This technical document from Circuit Energy outlines the statistical levels used to evaluate continuous power supply quality and avoid equipment failure.

• 01
  Assessed LevelThe current, real-time quality of the system, typically determined through precise measurements over one week.
• 02
  Planning LevelThe design target set by electric utilities, intentionally kept below the compatibility level to provide a safety buffer.
• 03
  Compatibility LevelThe benchmark level for steady-state voltage quality that a supply should not exceed.
• 04
  Equipment Immunity LevelThe threshold at which equipment performance begins to degrade if surpassed.
• 05
  Equipment Damage LevelThe critical point where power quality endangers equipment, leading to overheating, harmonic resonance, or high neutral currents.

To ensure equipment functions without malfunctioning or sustaining damage, clear gaps must be maintained between the supply's compatibility level and the equipment's immunity or damage levels. Download the full document for detailed guidance.