1. BS EN 61811-1:2015. Electromechanical telecom elementary relays of assessed quality - Part 1: Generic specification and blank detail specification

2. BS EN 61811-10:2003. Electromechanical elementary relays of assessed quality - Part 10: Sectional specification - Relays for industrial application

3. BS EN 61811-11:2003. Electromechanical elementary relays of assessed quality - Part 11: Blank detail specification - Relays for industrial application

4. BS EN 61811-50:2002. Electromechanical all-or-nothing relays - Part 50: Sectional specification - Electromechanical all-or-nothing telecom relays of assessed quality

5. BS EN 61811-51:2002. Electromechanical all-or-nothing relays - Part 51: Blank detail specification -Electromechanical all-or-nothing telecom relays of assessed quality - Non-standardized types and construction

6. BS EN 61811-52:2002. Electromechanical all-or-nothing relays - Part 52: Blank detail specification -electromechanical all-or-nothing telecom relays of assessed quality - Two change-over contacts, 20 mm x 10 mm base

7. BS EN 61811-53:2002. Electromechanical all-or-nothing relays - Part 53: Blank detail specification - Electromechanical all-or-nothing telecom relays of assessed quality - Two change-over contacts, 14 mm x 9 mm base

8. BS EN 61811-54:2002. Electromechanical all-or-nothing relays - Part 54: Blank detail specification -Electromechanical all-or-nothing telecom relays of assessed quality - Two change-over contacts, 15 mm x 7,5 mm base

9. BS EN 61811-55:2002. Electromechanical all-or-nothing relays - Part 55: Blank detail specification -electromechanical all-or-nothing telecom relays of assessed quality - Two change-over contacts, 11 mm x 7,5 mm (max.) base

10. BS EN 61812-1:2011. Time relays for industrial and residential use - Part 1: Requirements and tests