Summary
Thermal relays such as this were used to delay the application of plate voltage to mercury vapour rectifiers for enough time for them to warm up properly. Premature application of plate voltage can result in arcing in the rectifier which will rapidly destroy it.
Physical Description
Tubular bulb with 4 pin European style base
More Information
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Collecting Areas
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Acquisition Information
Donation from Waltham Trading Co, 05 Apr 1948
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Manufacturer
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Inscriptions
Base: 10FB-977
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Model Name or Number
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Brand Names
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Classification
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Category
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Discipline
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Type of item
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Overall Dimensions
138 mm (Length), 31 mm (Outside Diameter)
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References
[Link 1] (Classification and function of relays: accessed 21 December 2010)
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Keywords