Behind the scenes the specialist engineers and craftsmen who look after the electricity supply system use a wide variety of instruments. Here are just a few of the devices in our collection.

SWEHS000711a.jpg - Date c1900 - Weston Instrument Co., Newark, NJ, USA Weston's direct reading ammeter, 0-50 amps. 7151.
SWEHS000711a.jpg – Date c1900 – Weston Instrument Co., Newark, NJ, USA Weston’s direct reading ammeter, 0-50 amps. Model 7151. Notice that it’s an “Am-meter” not an ammeter.
SWEHS000356a.jpg - Date c1950 - Cambridge Instrument Co. Ltd. L-61498 Ex SWEB Redruth..
SWEHS000356a.jpg – Date c1950 – Cambridge Instrument Co. Ltd. L-61498 “Direct reading fault localiser”. Ex SWEB Redruth.
SWEHS000538.jpg - Date c1961 - H Tinsley & Co. Ltd., London SE 26 Power Supply 5359J Ex South Western Electricity Board, Cornwall Group Commercial Department. Used for electric underfloor heating cable fault location..
SWEHS000538.jpg – Date c1961 – H Tinsley & Co. Ltd., London SE 26 Power Supply 5359J Ex South Western Electricity Board, Cornwall Group Commercial Department. Used for electric underfloor heating cable fault location.
SWEHS000224c.jpg - Date c1964 - Datafonic System Mark III ex South Western Electricity Board..
SWEHS000224c.jpg – Date c1964 – Datafonic System Mark III ex South Western Electricity Board. Early automation – remote control and monitoring of major substations.
SWEHS000281.jpg - Date c1930/40's - Manufacturer unknown Affixed to substations..
SWEHS000281.jpg – Date c1930/40’s – Manufacturer unknown. Owner’s nameplate affixed to substations.

Notes and suggestions for further reading

… will be added in due course.