CEI EN 50381 : 2006

1 Scope
2 Normative references
3 Definitions
4 Construction requirements for TVR's and ducting
5 Requirements for TVR's, equipment group I, type of
   protection vM2
6 Ventilation requirements for TVR's, equipment group II
7 Additional ventilation requirements for TVR'S with an
   internal source of release
8 Temperature limits
9 Minimum safety provisions and devices
10 Additional safety provisions and devices for TVR's
   meeting the requirements of type of protection v2
   and vM2
11 Additional requirements for TVR's with an internal
   source of release
12 Requirements for gas detectors
13 Supply of protective gas
14 Type verification and tests
15 Routine tests
16 Marking
17 Instructions
Annex A (normative) - Method of protection of electrical
        apparatus containing a potential release of a flammable
        gas or vapour
Annex B (normative) - Method of protection of electrical
        apparatus containing a potential release of a flammable
        liquid
Annex C (informative) - Determination of peak rise in
        enclosure pressure, resulting from an internal release
        of a flashing liquid
Annex D (informative) - Method of protection of electrical
        apparatus containing a potential release of a flammable
        gas or vapour
Annex E (informative) - Mathematical model of dilution
        of a source of release
Annex ZZ (informative) - Coverage of essential Requirements
         of EC Directives
Bibliography

Describes the specific requirements for the construction and testing of transportable ventilated rooms (TVR's), such as skid mounted analyser houses with type of protection 'v' intended for use in potentially explosive atmospheres.