Electrical revenue meter and instrument transformers mobile station
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United States of America Patent
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Feb 24, 2004
Grant Date -
N/A
app pub date -
Feb 15, 2002
filing date -
Feb 15, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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