Cite
HARVARD Citation
Institution,, B. (1988) Specification for air-break switches, air-break disconnectors, air-break switch disconnectors and fuse-combination units for voltages up to and including 1000 V a.c. and 1200 V d.c.. [Online]. London : British Standards Institution. Available from: http://access.bl.uk/ark:/81055/vdc_100104958941.0x000001