The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 2018
Filed:
Aug. 09, 2013
Applicant:
British Telecommunications Public Limited Company, London, GB;
Inventor:
John Warren, London, GB;
Assignee:
British Telecommunications Public Limited Company, London, GB;
Primary Examiner:
Int. Cl.
CPC ...
H02J 4/00 (2006.01); G08B 21/18 (2006.01); G01R 31/36 (2006.01); H02H 3/33 (2006.01); H02H 7/18 (2006.01);
U.S. Cl.
CPC ...
H02J 4/00 (2013.01); G01R 31/3679 (2013.01); G08B 21/182 (2013.01); H02H 3/335 (2013.01); H02H 7/18 (2013.01);
Abstract
An electrical equipment cabinet has a standby battery to supply current when a mains connection is not available. In normal operation the battery is maintained charged by the mains supply. In order to test the condition of the battery, a measuring system is arranged to operation in co-operation with a test of a residual current detection device, which temporarily disconnects the mains supply, thus measuring the condition of the battery, when under load.