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BS EN 60079-6:2015

BS EN 60079-6:2015

$142.49

Explosive atmospheres – Equipment protection by liquid immersion “o”

Published By Publication Date Number of Pages
BSI 2015 32
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This part of IEC 60079 specifies the requirements for the design, construction, testing and marking of Ex Equipment and Ex Components with type of protection liquid immersion “o” intended for use in explosive gas atmospheres.

Ex Equipment and Ex Components of type of protection liquid immersion “o” are either:

  • Level of Protection “ob” (EPL “Mb” or “Gb”)

  • Level of Protection “oc” (EPL “Gc”)

For Level of Protection “ob”, this standard applies where the rated voltage does not exceed 11 kV r.m.s. a.c. or d.c.

For Level of Protection “oc”, this standard applies where the rated voltage does not exceed 15 kV r.m.s. a.c. or d.c.

NOTE

Requirements for higher voltages are under consideration.

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
11 English

CONTENTS
13 FOREWORD
15 1 Scope
2 Normative references
16 3 Terms and definitions
17 4 Constructional requirements
4.1 General
4.2 Levels of protection and requirements of electrical equipment
4.2.1 Level of Protection
18 4.2.2 Requirements for Level of Protection “ob”
4.2.3 Requirements for Level of Protection “oc”
4.3 Switching device
4.4 Creepage and clearance
Table 1 – Working voltage
19 4.5 Liquid containment enclosures
4.5.1 General
4.5.2 Sealed enclosures
4.5.3 Unsealed enclosures
4.5.4 Outlet of breathing device or pressure relief device
4.5.5 Enclosures intended to be opened
4.5.6 Determination of the maximum/minimum criteria of the protective liquid
20 4.6 Immersion depth
4.7 Protective liquid level indication
4.7.1 General
Table 2 – Depth of immersion
21 4.7.2 Remote-indicating protective liquid level indicator
4.7.3 Safety devices for Level of Protection “ob”
4.8 Temperature limitations
4.8.1 General
4.8.2 Maximum Surface Temperature
4.8.3 Flashpoint of the protective liquid
4.9 Field wiring connections to liquid immersion equipment
4.10 Constructional elements of enclosures
4.10.1 Operating rods, shafts etc.
22 4.10.2 Devices for draining of liquid
5 Protective Liquid
5.1 Protective liquid specification
5.2 Detailed alternative specification
5.3 Group I equipment
5.4 Liquid contamination and gassing that may result from arcing
23 5.5 Total volume of the protective liquid
6 Verifications and tests
6.1 Type tests
6.1.1 Overpressure test on sealed enclosures
6.1.2 Reduced pressure test on sealed enclosures
6.1.3 Overpressure test on unsealed enclosures
6.1.4 Maximum temperature
24 6.1.5 Switching Tests
6.2 Routine tests
6.2.1 Sealed enclosures
6.2.2 Unsealed enclosures
7 Marking
25 8 Instructions
26 Annex A (normative) Selection and erection requirements
27 Annex B (normative) Maintenance requirements
Table B.1 – Inspection requirements
28 Annex C (normative) Repair and Overhaul requirements
29 Bibliography

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BS EN 60079-6:2015
$142.49