BS EN 60079-18:2015+A1:2017:2018 Edition
$189.07
Explosive atmospheres – Equipment protection by encapsulation “m”
| Published By | Publication Date | Number of Pages |
| BSI | 2018 | 48 |
This part of IEC 60079 gives the specific requirements for the construction, testing and marking of electrical equipment, parts of electrical equipment and Ex components with the type of protection encapsulation “m” intended for use in explosive gas atmospheres or explosive dust atmospheres.
This part applies only for encapsulated electrical equipment, encapsulated parts of electrical equipment and encapsulated Ex components (hereinafter always referred to as “m” equipment) where the rated voltage does not exceed 11 kV.
The application of electrical equipment in atmospheres, which may contain explosive gas as well as combustible dust simultaneously, may require additional protective measures.
This standard does not apply to dusts of explosives, which do not require atmospheric oxygen for combustion, or to pyrophoric substances
This standard does not take account of any risk due to an emission of flammable or toxic gas from the dust.
This standard supplements and modifies the general requirements of IEC 60079‑0. Where a requirement of this standard conflicts with a requirement of IEC 60079‑0, the requirement of this standard takes precedence.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 6 | European foreword Anchor 4 |
| 7 | Foreword to amendment A1 |
| 8 | Annex ZA (normative) Normative references to international publications with their corresponding European publications |
| 10 | Annex ZZ (informative) Relationship between this European standard and the essential requirements of 2014/34/EU [2014 OJ L96] aimed to be covered |
| 15 | FOREWORD |
| 19 | 1 Scope 2 Normative references |
| 20 | 3 Terms and definitions |
| 21 | 4 General 4.1 Level of protection (equipment protection level (EPL)) 4.2 Additional requirements for levels of protection “ma” and “mb” 4.3 Additional requirements for level of protection “ma” 4.4 Rated voltage and prospective short circuit current 5 Requirements for compounds 5.1 General 5.2 Specification |
| 22 | 5.3 Properties of the compound 5.3.1 Water absorption 5.3.2 Dielectric strength 6 Temperatures 6.1 General |
| 23 | 6.2 Determination of the limiting temperatures 6.2.1 Maximum surface temperature 6.2.2 Temperature of the compound 6.3 Temperature limitation 7 Constructional requirements 7.1 General |
| 24 | 7.2 Determination of faults 7.2.1 Fault examination 7.2.2 Components considered as not subject to fail |
| 25 | 7.2.3 Isolating components 7.2.4 Infallible separation distances |
| 26 | 7.3 Free space in the encapsulation 7.3.1 Group III “m” equipment |
| 27 | 7.3.2 Group I and Group II “m” equipment |
| 28 | 7.4 Thickness of the compound 7.4.1 “m” equipment |
| 30 | 7.4.2 Windings for electrical machines 7.4.3 Rigid, multi-layer printed wiring boards with through connections |
| 31 | 7.5 Switching contacts 7.5.1 General 7.5.2 Level of protection “ma” 7.5.3 Level of protection “mb” |
| 32 | 7.5.4 Level of protection “mc” 7.6 External connections 7.6.1 General 7.6.2 Additional requirements for “ma” equipment 7.7 Protection of bare live parts 7.8 Cells and batteries 7.8.1 General 7.8.2 Prevention of gassing |
| 33 | 7.8.3 Protection against inadmissible temperatures and damage to the cells or batteries 7.8.4 Reverse current 7.8.5 Current limitation |
| 34 | 7.8.6 Protection against the polarity inversion and deep discharge of the cells 7.8.7 Charging of cells or batteries 7.8.8 Requirements for control safety devices for cells or batteries |
| 35 | 7.9 Protective devices 7.9.1 General 7.9.2 Electrical protective devices |
| 36 | 7.9.3 Thermal protective devices 7.9.4 Built-in protective devices |
| 37 | 8 Type tests 8.1 Tests on the compound 8.1.1 Water absorption test 8.1.2 Dielectric strength test 8.2 Tests on the apparatus 8.2.1 Test sequence 8.2.2 Maximum temperature |
| 38 | 8.2.3 Thermal endurance test 8.2.4 Dielectric strength test |
| 39 | 8.2.5 Cable pull test |
| 40 | 8.2.6 Pressure test for Group I and Group II electrical equipment 8.2.7 Test for resettable thermal protective device |
| 41 | 8.2.8 Sealing test for built-in protective devices 9 Routine verifications and tests 9.1 Visual inspections 9.2 Dielectric strength test |
| 42 | 10 Marking |
| 43 | Annex A (informative) Basic requirements for compounds for “m” equipment |
| 44 | Annex B (informative) Allocation of test samples |
| 45 | Annex C (normative) Dielectric strength test between circuits and environment |
| 46 | Bibliography |
