The following reference material is reprinted, with permission, from the Engineer's Relay Handbook, 5th edition, published by the Relay and Switch Industry Assosication (RSIA) – formerly NARM. For information on the association or how to obtain the complete handbook, contact:

Relay and Switch Industry Association (RSIA)
2500 Wilson Boulevard
Arlington, VA 22201
(703) 907-8025
Fax: (703) 875-8908
Email: narm@ecaus.org

Relay and Switch Industry Association (RSIA)
  1. [P----] CHAPTER_1.1_INTRODUCTION
  2. [P----] CHAPTER_1.2_SCOPE_OF_THIS_SECTION
  3. [P----] CHAPTER_1.3_DEFINING_RELAY_PERFORMANCE
  4. [P----] CHAPTER_1.4_RELAY_DESIGNATIONS_SYMBOLS_DIAGRAMS
  5. [P----] CHAPTER_1.5_RELAY_LETTER_SYMBOLS
  6. [P----] CHAPTER_1.6_RELAY_COIL_AND_CONTACT_SYMBOLS
  7. [P----] CHAPTER_1.7_RELAY_TERMS_AND_DEFINITIONS_(ABC)
  8. [P----] CHAPTER_1.7_RELAY_TERMS_AND_DEFINITIONS_(DEFGHIJKLMNOP)
  9. [P----] CHAPTER_1.7_RELAY_TERMS_AND_DEFINITIONS_(QR)
  10. [P----] CHAPTER_1.7_RELAY_TERMS_AND_DEFINITIONS_(STUVWXYZ)
  11. [P----] CHAPTER_3.1_PRINCIPLES_OF_OPERATION_INTRODUCTION
  12. [P----] CHAPTER_3.2_PRINCIPLES_OF_OPERATION_DIRECT_CURRENT_RELAYS
  13. [P----] CHAPTER_3.3_PRINCIPLES_OF_OPERATION_MECHANICAL_REQUIREMENTS
  14. [P----] CHAPTER_3.4_PRINCIPLES_OF_OPERATION_POWER-FORCE-STROKE-RELATIONSHIP
  15. [P----] CHAPTER_3.5_MATCHING_MECHANICAL_AND_ELECTRICAL_CHARACTERISTICS
  16. [P----] CHAPTER_3.6_DYNAMIC_CONSIDERATIONS
  17. [P----] CHAPTER_3.7_DESIGN_ANALYSIS
  18. [P----] CHAPTER_3.8_WINDING_CIRCUIT_DESIGN
  19. [P----] CHAPTER_3.9_WINDING_RESISTANCE_AND_SENSITIVITY
  20. [P----] CHAPTER_3.10_DIELECTRIC_CONSIDERATIONS
  21. [P----] CHAPTER_3.11_TIMING_CHARACTERISTICS
  22. [P----] CHAPTER_3.12_HEATING_CONSIDERATIONS
  23. [P----] CHAPTER 3.13_CONTACT_PERFORMANCE
  24. [P----] CHAPTER 3.14_CONTACT_CHARACTERISTICS
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