This part of Explosive Atmospheres contains the specific requirements for the construction and testing of electrical apparatus with pressurized enclosures, of type of protection "p", intended for use in explosive gas atmospheres. It specifies requirements for pressurized enclosures containing a limited release of a flammable substance.
This part supplements and modifies the general requirements of GB 3836.1. Where a requirement of this part conflicts with a requirement of GB 3836.1, the requirements of this part take precedence.
This part does not contain the requirements for:
——pressurized enclosures where the containment system may release
a) air with an oxygen content greater than normal, or
b) oxygen in combination with inert gas in a proportion greater than 21%;
——pressurized rooms or analyser houses; see GB 3836.17-2007 and IEC 60079-16.
Note 1: Due to the safety factors incorporated in the type of protection, the uncertainty of measurement inherent in good quality, regularly calibrated measurement equipment is considered to have no significant detrimental effect and need not be taken into account when making the measurements necessary to verify compliance of the equipment with the requirements of this part.
Note 2: When the user acts in the role of the manufacturer, it is typically the user’s responsibility to ensure that all relevant parts of this part are applied to the manufacturing and testing of the equipment.
Note 3: Types of protection "px" and "py" provide Equipment Protection Levels (EPL) Gb or Mb. Type of protection "pz" provides Equipment Protection Level (EPL) Gc. For further information, see Annex H.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 2900.35-2008 Electrotechnical Terminology - Equipment for Explosive Atmospheres (IEC 60050-426:2008, IDT)
GB/T 2900.83-2008 Electrotechnical Terminology - Electrical and Magnetic Devices (IEC 60050-151:2001, IDT)
GB 3836.1-2010 Explosive Atmospheres - Part 1: Equipment - General Requirements (IEC 60079-0:2007, MOD)
GB/T 4207-2012 Method for the Determination of the Proof and the Comparative Tracking Indices of Solid Insulating Materials (IEC 60112:2009, IDT)
GB/T 4208-2008 Degrees of Protection Provided by Enclosure (IP Code) (IEC 60529:2001, IDT)
GB/T 4942.1-2006 Degrees of Protection Provided by the Integral Design of Rotating Electrical Machines (IP Code) - Classification (IEC 60034-5:2000, IDT)
GB/T 16935.1-2008 Insulation Coordination for Equipment within Low-voltage Systems - Part 1: Principles, Requirements and Tests (IEC 60664-1:2007, IDT)
3 Terms and Definitions
GB/T 3836.5-2017 The following standards are cited：
GB/T 3836.5-2017 Cited by the following standards：
