501. Plugs, socket-outlets and couplers for industrial purposes. General requirements Part 1, (15th September 1992) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (58 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
502. Nuclear power plants. Instrumentation and control systems important for safety. Requirements for electrical supplies. (15th July 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (22 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
503. Electromagnetic compatibility (EMC). General guide on harmonics and interharmonics measurements and instrumentation, for power supply systems and equipment connected thereto Part 4-7, (15th June 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (28 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
504. Test methods for electro-slag remelting furnaces. (15th September 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) ↗
505. Private branch exchanges for connection to public switched telephone networks run by certain public telecommunications operators. Specification for private branch exchanges with terminating stations treated as an entirety Part 2, (15th February 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (32 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
506. Apparatus for connection to private circuits run by certain public telecommunication operators. Specification for apparatus for connection to digital circuits according to CCITT Recommendation X.21 bis Part 7, (15th July 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (14 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
507. High-voltage test techniques for low-voltage equipment. Definitions, test and procedure requirements Part 1, (1st August 1995) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (26 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
508. Safety of machinery. Electrical equipment of machines. Specification for general requirements Part 1, (15th March 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (72 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
509. Application guide for calculation of short-circuit currents in low-voltage radial systems. (15th April 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (38 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
510. Electrical protection relays. Information and requirements for all protection relays. Specification for electrical disturbance tests. Fast transient disturbance test Part 1.4.4, (15th February 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) ↗