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公开(公告)号：US11942816B2
公开(公告)日：2024-03-26
申请号：US17538306
申请日：2021-11-30
Applicant: Aclara Technologies LLC
Inventor： Curtis W. Crittenden , Carl Oppenheimer
CPC classification number: H02J9/06 , G01R31/086 , H02J3/0073 , H01H2300/018
Abstract: An electric utility distribution system in which power is supplied by a distribution transformer through an electric utility meter including an apparatus for detecting the presence of a back-feed voltage source connected to the load. The apparatus includes a virtual neutral established in the electric utility meter at ground potential and a remote switch that is opened to interrupt electric power flow from the distribution transformer to the load. The apparatus further includes a balanced voltage divider circuit including a connection point established between a pair of series connected resistive elements. In addition, the apparatus includes a detection circuit configured to monitor a voltage signal at the connection point to detect a back-feed voltage source connected between a neutral conductor of the electric utility distribution system and one of a first or second power line at the load.
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公开(公告)号：US20220166248A1
公开(公告)日：2022-05-26
申请号：US17538306
申请日：2021-11-30
Applicant: Aclara Technologies LLC
Inventor： Curtis W. Crittenden , Carl Oppenheimer
Abstract: An electric utility distribution system in which power is supplied by a distribution transformer through an electric utility meter including an apparatus for detecting the presence of a back-feed voltage source connected to the load. The apparatus includes a virtual neutral established in the electric utility meter at ground potential and a remote switch that is opened to interrupt electric power flow from the distribution transformer to the load. The apparatus further includes a balanced voltage divider circuit including a connection point established between a pair of series connected resistive elements. In addition, the apparatus includes a detection circuit configured to monitor a voltage signal at the connection point to detect a back-feed voltage source connected between a neutral conductor of the electric utility distribution system and one of a first or second power line at the load.
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公开(公告)号：US11190045B2
公开(公告)日：2021-11-30
申请号：US16723173
申请日：2019-12-20
Applicant: Aclara Technologies LLC
Inventor： Curtis W. Crittenden , Carl Oppenheimer
Abstract: An electric utility distribution system in which power is supplied by a distribution transformer through an electric utility meter including an apparatus for detecting the presence of a back-feed voltage source connected to the load. The apparatus includes a virtual neutral established in the electric utility meter at ground potential and a remote switch that is opened to interrupt electric power flow from the distribution transformer to the load. The apparatus further includes a balanced voltage divider circuit including a connection point established between a pair of series connected resistive elements. In addition, the apparatus includes a detection circuit configured to monitor a voltage signal at the connection point to detect a back-feed voltage source connected between a neutral conductor of the electric utility distribution system and one of a first or second power line at the load.
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