511. Specification for voltage transformers. (15th February 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (60 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
512. Designations for signals and connections. (15th December 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (48 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
513. Specification for modems for connection to public switched telephone networks and speech band private circuits run by certain public telecommunications operators. (31st October 1992) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (16 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
514. Performance and testing of teleprotection equipment of power systems. Analogue comparison system Part 2, (15th October 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (34 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
515. Private branch exchanges for connection to public switched telephone networks run by certain public telecommunications operators. Specification for general requirements Part 1, (15th February 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (40 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
516. Internal fuses and internal overpressure disconnectors for capacitors for inductive heat generating plants. (15th March 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (12 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
517. Specification for light domestic duty jumper lead sets for automotive starting. (15th September 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (16 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
518. Specification for current transformers. (15th February 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (46 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
519. Code of practice for audio-frequency induction-loop systems (AFILS). (15th August 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (98 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
520. Information technology. 8 mm wide magnetic tape cartridge for information interchange. Helical scan recording. (15th November 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (66 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗