BS EN 61109:2008 Insulators for overhead lines. Composite suspension and tension insulators for a.c. systems with a nominal voltage greater than 1000 V. Definitions, test methods and acceptance criteria
BS EN 61109 applies to composite suspension/tension insulators consisting of a load-bearing cylindrical insulating solid core consisting of fibres – usually glass – in a resinbased matrix, a housing (outside the insulating core) made of polymeric material and end fittings permanently attached to the insulating core.
Composite insulators covered by BS EN 61109 are intended for use as suspension/tension line insulators, but it should be noted that these insulators can occasionally be subjected to
compression or bending, for example when used as phase-spacers.
BS EN 61109 can be applied in part to hybrid composite insulators where the core is made of a homogeneous material (porcelain, resin).
The object of BS EN 61109 is to
– define the terms used,
– prescribe test methods,
– prescribe acceptance criteria.
BS EN 61109 does not include requirements dealing with the choice of insulators for specific operating conditions.
Contents of BS EN 61109:
- Introduction
- Scope and object
- Normative references
- Terms, definitions and abbreviations
- Terms and definitions
- Abbreviations
- Identification
- Environmental conditions
- Transport, storage and installation
- Hybrid insulators
- Tolerances
- Classification of tests
- Design tests
- Type tests
- Sample tests
- Routine tests
- Design tests
- Test specimens for IEC 62217
- Tests on interfaces and connections of end fittings
- Tracking and erosion test
- Tests on core material
- Product specific pre-stressing for IEC 62217
- Sudden load release
- Thermal-mechanical pre-stress
- Assembled core load-time tests
- Test specimens
- Mechanical load test
- Type tests
- Electrical tests
- Damage limit proof test and test of the tightness of the interface between end
- fittings and insulator housing
- Test specimens
- Performance of the test
- Evaluation of the test
- Sample tests
- General rules
- Verification of dimensions (E1 + E2)
- Verification of the end fittings (E2)
- Verification of tightness of the interface between end fittings and insulator
- housing (E2) and of the specified mechanical load, SML (E1
- Galvanizing test (E2)
- Re-testing procedure
- Routine tests
- Mechanical routine test
- Visual examination
