BS G 179-1:1962

1. Scope
2. Definitions
Section One: General requirements
3. General
4. Rating
5. Performance
6. Declarations
7. Marking
Section Two: Particular requirements
8. Method of operation
9. Construction
10. Dimensions
11. Environmental requirements
12. Explosion-proofness
13. Magnetic interference
Section Three: Tests
14. General
A. TYPE TESTS
15. Vibration
16. Acceleration test
17. Climatic test
18. High voltage and insulation tests
19. Test of explosion-proofness
20. Measurement of compass safe distance
21. Tests of temperature rise and minimum and maximum
     limit of ultimate trip current
22. Operating forces test
23. Mechanical tests
     a. Strength of terminations
     b. Strength of push button
     c. Strength of actuating level
     d. Strength of panel mounting bush
24. Test of calibration of overload trip
25. Overload and re-closure test
26. Endurance
27. Making and breaking capacity tests
28. Test of self re-closing at low temperature
B. PROTECTION TESTS
29. Calibration tests
30. High voltage and insulation tests
C. QUALITY TESTS
31. Selection of samples
32. Tests of minimum and maximum limit of ultimate trip
     current
33. Test of calibration of overload trip
35. Vibration tests
36. Strip examination and report
APPENDIX
Serviceability tests

Gives requirements for hand-operated single-pole, trip-free circuit breakers with an inverse time/current overload characteristic used in nominal 28 V d.c. and/or 115 V single phase 400 c/s a.c. line to neutral circuits. Suitable for mounting through a panel from the rear and operating satisfactorily when mounted in any altitude. The preferred operating method is a single button pushed to make and pulled to break the circuit, the button being perpendicular to the plane of the mounting panel. Includes serviceability tests.