BS 5724-2.15:1989

National foreword
Committees responsible
Section one: General
Clause
1. Scope and object
1.1 Scope
1.2 Object
1.3 Particular Standards
1.4 Environmental conditions
2. Terminology and definitions
2.12 Miscellaneous
3. General requirements
3.101 Conventional meanings of electrical quantities
3.102 Radiation quantities
4. General requirements for tests
4.1 Type tests and routine tests
4.10 Moisture pre-conditioning treatment
5. Classification
6. Identification, marking and documents
6.1 Marking on the outside of equipment or equipment
       parts
6.2 Marking on the inside of equipment or equipment
       parts
6.7 Indicator lights and push buttons
6.8 ACCOMPANYING DOCUMENTS
7. Power input
Section two: Safety requirements
8. Basic safety categories
9. Removable protective means
10. Special environmental conditions
11. Special measures with respect to safety
12. SINGLE FAULT CONDITION
Section three: Protection against electric shock hazards
13. General
14. Requirements related to classification
15. Limitation of voltage and/or current
16. Enclosures and PROTECTIVE COVERS
17. Insulation and PROTECTIVE IMPEDANCES
18. Earthing and potential equalization
19. Continuous LEAKAGE CURRENTS and PATIENT AUXILIARY
     CURRENTS
19.3 Allowable values
20. Dielectric strength
20.3 Values of test voltages
20.4 Tests
Section four: Protection against mechanical hazards
21. Mechanical strength
22. Moving parts
23. Surfaces, corners and edges
24. Stability and transportability
25. Expelled parts
26. Vibration and noise
27. Pneumatic and hydraulic power
28. Suspended masses
Section five: Protection against hazards from unwanted
or excessive radiation
29. X-radiation
29.1 X-RADIATION generated by diagnostic CAPACITOR
       DISCHARGE X-RAY GENERATORS
30. Alpha, beta, gamma, neutron radiation and other
     particle radiation
31. Microwave radiation
32. Light radiation (including visual radiation and
     lasers)
33. Infra-red radiation
34. Ultra-violet radiation
35. Acoustical energy (including ultrasonics)
36. Electromagnetic compatibility
Section six: Protection against the hazards of explosions
in medically used rooms
37. General
38. Classification, marking and ACCOMPANYING DOCUMENTS
     of ANAESTHETIC-PROOF EQUIPMENT
39. Common requirements for "AP" and "APG" equipment
40. Requirements and tests for ANAESTHETIC-PROOF
     EQUIPMENT, equipment parts or components (AP)
41. Requirements and tests for ANAESTHETIC-PROOF
     CATEGORY G EQUIPMENT, equipment parts or components
Section seven: Protection against excessive temperatures,
fire and other hazards, such as human errors
42. Excessive temperatures
42.1 Addition
42.5 Guards
43. Fire prevention
44. Overflow, spillage, leakage, humidity, ingress of
     liquids, cleaning, sterilization and disinfection
45. Pressure vessels and parts subject to pressure
46. Human errors
47. Electrostatic charges
48. Materials in APPLIED PARTS in contact with the body
     of the PATIENT
49. Interruption of the power supply
Section eight: Accuracy of operating data and protection
against incorrect output
50. Accuracy of operating data
50.1 Indication of electric and radiation output
50.101 through 50.103 REQUIREMENTS ON OPERATIONAL DATA
50.101 Reproducibility of radiation output
50.102 Agreement between indicated and measured values
       of LOADING FACTORS
50.103 Correction for fluctuations of MAINS VOLTAGE
50.104 to 50.107 GENERAL REQUIREMENTS ON COMPLIANCE
                  TESTS
50.104 Test conditions
50.105 General
50.106 Methods of measuring LOADING FACTORS
50.107 Conditions for measuring AIR KERMA
50.108 and 50.109 PRESELECTED LOADING FACTORS FOR TESTS
50.108 Combination of LOADING FACTORS for the
        determination of COEFFICIENT OF VARIATION
50.109 Combination of LOADING FACTORS for the
        determination of PER CENT AVERAGE ERROR
51. Protection against incorrect output
Section nine: Fault conditions causing overheating and/
or mechanical damage; environmental tests
52. Fault conditions causing overheating and/or
     mechanical damage
53. Environmental tests
Section ten: Constructional requirements
54. General
55. Enclosures and covers
56. Components and general assembly
56.8 Indicators
56.11 Switches
57. MAINS PARTS, components and layout
57.1 Separation from the SUPPLY MAINS
57.9 Mains supply transformers and MEDICAL ISOLATING
       TRANSFORMERS
57.10 CREEPAGE DISTANCES and AIR CLEARANCES
58. PROTECTIVE EARTH TERMINALS
59. Construction and layout
59.4 Oil containers
Figure 101 - TOTAL FILTRATION for the measurement of
               AIR KERMA
Table 101 - Permissible PER CENT AVERAGE ERROR of
               LOADING FACTORS
Appendix AA - Terminology
         AA2 - Alphabetical Index of English terms

X-ray generators, in which electrical energy for loading is completely or mainly stored and switched capacitively, and in which the storage capacitor does not exceed 2GmF and the tube voltage is 40 kV to 150 kV.

Addition: This Particular Standard applies to capacitor discharge X-ray generators operating in intermittent mode for medical radiography, in which the electrical energy for loading of the X-ray tube is completely or mainly capacitively stored at, and switched in, the high-voltage circuit. This Particular Standard is confined to those devices which are medical electrical equipment and in which the storage capacitor is in the high-voltage circuit and has a specified capacitance not exceeding 2μF, the initial X-ray tube voltage is between 40kV and 150kV, an overcurrent protection, if provided, would not require a rating exceeding that which corresponds to an apparent power of 3 kVA, LOADING of the X-ray TUBE is controlled in the high-voltage circuit. This Particular Standard does not exclude capacitor discharge X-ray generators that are capable of operation in continuous mode for direct radioscopy or indirect radioscopy. However, for this mode of operation the device will have to comply with the relevant requirements for diagnostic high-voltage generators and diagnostic X-ray equipment (see Sub-clause1.3.102).