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US 4,843,310 AGranted
Electricity meter with arrangement for monitoring core saturation incidents
AssigneeLGZ Landis & Gyr Zug AG
InventorRichard Friedl
Life of this patent
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Abstract
A device for use in connection with electricity meters incorporating current transformers is disclosed. The device detects saturation incidents of the magnetic cores of the transformers, thereby reducing measurement errors.
Claims9
In an electricity meter, an arrangement comprising:
- at least one current transformer including at least one magnetic core, a first winding surrounding said magnetic core and operable for carrying a primary current to be measured, and a second winding surrounding said magnetic core and operable for carrying a secondary current;
- and
- means for determining measurement errors due to saturation of said magnetic core including detecting means operable for indicating each occurrence of saturation of said magnetic core and accumulating means for accumulating the durations of the occurrences of saturation of said magnetic core.
Dependencies are inferred from the claim text.