BS EN 62621 is a European standard that discusses specific requirements for composite insulators used for overhead contact of electric traction in railways to ensure the suitability of an insulator product for a given railway environment.
BS EN 62621 outline the characteristics of composite insulators of electric traction overhead contact line systems for railways, as defined in IEC 60913.
Insulators specified in BS EN 62621 are applied for electric traction supply voltages with a nominal voltage greater than 1 000 V for A.C. or a nominal voltage greater than 1 500 V for D.C.
BS EN 62621 applies to composite insulators as defined in 3.1 below and not to other polymeric insulators.
The provisions contained in BS EN 62621 are intended for the design and construction of new electric traction overhead contact line systems using insulators, or when complete refurbishment of existing overhead contact line systems takes place.
Additional tests may be specified by the client to measure the compliance of the insulator under operating conditions.
BS EN 62621 establishes the product characteristics, the test methods, and acceptance criteria.
The object of BS EN 62621 is to stipulate the provisions for the design and provision of the service indicated by the manufacturer to the customer or informed buyer for application on the railway infrastructure
Note: Specific applications where high torsional loads can occur are outside the scope of BS EN 62621 and tests are agreed between the supplier and customer to represent the critical loading arrangements.
BS EN 62621 on the composite insulators used for overhead contact for railways is useful for:
The composite insulator is made of at least two insulating parts, namely a core and a housing equipped with end fittings. Composite insulators, for example, can consist either of individual sheds mounted on the core, with or without an intermediate sheath, or of housing directly moulded or cast in one or several pieces onto the core.
BS EN 62621 guideline assists you with characteristics such as environmental conditions, system voltages, system frequencies, creepage distance, mechanical requirements, corrosion, fire safety, tracking, erosion, arc protection, and in-running insulators for composite insulators for overhead contact line systems.
BS EN 62621 also guides on design tests, electrical tests, mechanical tests, verification of dimensions, sample tests, and sample tests for composite insulators used for overhead contact. In addition, assists you with transport, storage, installation, and maintenance for composite insulators for overhead contact line systems.
With compliance and obedience to BS EN 62621, you can standardize the quality of composite insulators used for overhead contact and assist you in properly assessing the composite insulators. It also assists you with a range of tests to evaluate the suitability of an insulator product for a given railway environment.
EN 62621:2016/A1:2016
EN 62621:2016/A1:2016