Cite
HARVARD Citation
Institution,, B. (2022) BS EN 61109. Insulators for overhead lines. Composite suspension and tension insulators for a.c. systems with a nominal voltage greater than 1 000 V. Definitions, test methods and acceptance criteria.. [Online]. London : British Standards Institution. Available from: http://access.bl.uk/ark:/81055/vdc_100161397491.0x000001