Electrical revenue meter and instrument transformers mobile station
US6696925B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 15, 2002 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Aug 1, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R22/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A mobile metering system (MMS) comprises a trailer-mounted fully-enclosed three-phase set of current transformers (CTs) and power transformers (PTs), and a metering interface. The instrument transformers reduce the source voltage to a meterable level. The MMS enclosure enables a single utility work crew to connect source-side power bushings mounted on the roof of the MMS to conductors from a compatible source, such as the secondary side of a substation transformer, without the need for a bucket truck. Load-side power bushings are also mounted on the roof of the MMS for connection to the power distribution network. An electromagnetic locking system prevents access to the interior of the enclosure while the MMS is energized. A rigid ground grid mounted on the roof of the MMS grounds the insulators, a ground loop grounds the CTs and PTs, and both the ground grid and the ground loop are connected to the earth ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.