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Actions	Details Remove from selection Add to selection Title Letter from M G Dewk, System Technical Engineer to E M Eulson, copied to Messrs D G Robertson, D S Crisford and D C Howroyd, regarding NPS Relays for East Coast Main Line Supplies Reference UK0108 SC MSS 193/2/53 Date 21 December 1988 Scope and Content Enclosed notes on unbalance penetration and negative phases sequences. Exent 6 ff. Persons keyword Howroyd Denis, Dwek M G, Eulson E M, British Rail Subject Voltage harmonics, Negative phase sequence, Traction, Railway electrification, Power supply Conditions governing access Open. Level of description Item Hierarchy browser 110000003 Special Collection Manuscripts contains 321 parts UK0108 SC MSS 193 Denis Howroyd Papers on Voltage Harmonics contains 3 parts UK0108 SC MSS 193/2 Working papers of Denis Howroyd contains 83 parts UK0108 SC MSS 193/2/53 Letter from M G Dewk, System Technical Engineer to E M Eulson, copied to Messrs D G Robertson, D S Crisford and D C Howroyd, regarding NPS Relays for East Coast Main Line Supplies

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Title
Letter from M G Dewk, System Technical Engineer to E M Eulson, copied to Messrs D G Robertson, D S Crisford and D C Howroyd, regarding NPS Relays for East Coast Main Line Supplies
Reference
UK0108 SC MSS 193/2/53
Date
21 December 1988
Scope and Content
Enclosed notes on unbalance penetration and negative phases sequences.
Exent
6 ff.
Persons keyword
Howroyd Denis, Dwek M G, Eulson E M, British Rail
Subject
Voltage harmonics, Negative phase sequence, Traction, Railway electrification, Power supply
Conditions governing access
Open.
Level of description
Item

Hierarchy browser