ANSI/IEEE Std 280-1985 IEEE Standard Letter Symbols for Quantifies Used in Electrical Science and Electrical Engineering -Description

Abstract: This standard provides letter symbols to represent various quantities (but not units) used in electrical science and technology. The standard is compatible with IEC Publication 27, Letter Symbols to be Used in Electrical Technology.

Content

• 1. Scope
• 2. References
• 3. General Principles of Letter Symbol Standardization
• • 3.1 Letter Symbols
  • 3.2 Alphabets and Typography
  • 3.3 Quantity Symbols
  • 3.4 Unit Symbols
  • 3.5 The International System of Units (SI)
• 4. Special Principles for Quantity Symbols in Electrical Science and Electrical Engineering
• • 4.1 Phasor Quantities
  • 4.2 Conventions
  • • 4.2.1 Time Varying Quantities
    • 4.2.2 Internal and External Resistances, etc
    • 4.2.3 Quantities Per Unit Volume, Area, or Length
    • 4.2.4 Sequence for Double Subscripts to Multiplying Operators
    • 4.2.5 Notation for Symmetrical Components
• 5. Introduction to the Tables
• 6. Symbols for Quantities

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