Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,252 pages of information and 227,823 images on early companies, their products and the people who designed and built them.

Switchgear Testing Co

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of Trafford Park, Manchester.

Conducted switchgear-testing programme for the constituent firms (presumably part of AEI).

1934 A sixteen-element electromagnetic oscillograph was made for the company by Metropolitan-Vickers.

1934 The 3 switchgear manufacturing companies in the AEI group - BTH, Ferguson Pailin and Metropolitan-Vickers Electrical Co were jointly erecting a high power testing plant to handle rupture tests on the largest types of switches[1]. It was initially equipped with a generator with a caapacity of 1500 MVA. The stator weighed 80 tons and was spring-mounted. 1200 HP were required to get the generator up to speed in 15 minutes, 300 HP for light running, and it took 30 minutes to run down.[2]


1961 Part of AEI[3]

See Also

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Sources of Information

  1. The Times, Apr 13, 1934
  2. 'B.T.H. Reminiscences - Sixty Years of Progress' compiled by H. A. Price-Hughes, BTH, 1946, p.75
  3. The Times, Aug 31, 1961