Other power quality standards

• UIE: International Union for Electricity Applications
• CENELEC: European Committee for Electrotechnical Standardization
• UNIPEDE: International Union of Producers and Distributors of Electrical Energy
• ANSI: American National Standards Institute
• ANSI C62: Guides and standards on surge protection
• ANSI C84.1: Voltage ratings for equipment and power systems
• ANSI C57.110: Transformer derating for supplying non-linear loads
• CIGRE: International Council on Large Electric Systems
• CIRED: International Conference on Electricity Distribution
• CBEMA / ITIC curve (~150k, PDF document)
  Information about the industry-standard way of graphing depth vs. duration of voltage sags.