Methods and apparatus for rendering electrical cables safe
First Claim
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1. An apparatus for attachment to a plurality of power cables electrically coupled to a permanent magnet motor comprising:
- a plurality of clamps selectively electrically coupled to a plurality of electrical conductors of the power cables, wherein the plurality of power cables are overwrapped by a metallic armor;
a plurality of shorting conductors electrically coupled to the clamps and extending therefrom;
the shorting conductors electrically coupled to a bus bar electrically shorting the shorting conductors; and
a conductor electrically coupled to the metallic armor and the bus bar.
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Abstract
A “safe grounding apparatus” (SGA) for safely grounding or neutralizing the electrical conductors for permanent magnet motor (PMM) powered artificial lift systems and methods of practicing the same are disclosed. The SGA of the present invention ameliorates some of the dangers associated with PMM'"'"'s. Methods of shorting, grounding, testing and monitoring the electrical conductors of a permanent magnet motor in order to safely manipulate the conductors are also disclosed.
8 Citations
20 Claims
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1. An apparatus for attachment to a plurality of power cables electrically coupled to a permanent magnet motor comprising:
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a plurality of clamps selectively electrically coupled to a plurality of electrical conductors of the power cables, wherein the plurality of power cables are overwrapped by a metallic armor; a plurality of shorting conductors electrically coupled to the clamps and extending therefrom; the shorting conductors electrically coupled to a bus bar electrically shorting the shorting conductors; and a conductor electrically coupled to the metallic armor and the bus bar. - View Dependent Claims (2, 3, 4)
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5. An apparatus for attachment to a plurality of power cables electrically coupled to a permanent magnet motor comprising:
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a plurality of clamps selectively electrically coupled to a plurality of electrical conductors of the power cables; a plurality of shorting conductors electrically coupled to the clamps and extending therefrom; the shorting conductors electrically coupled to a bus bar electrically shorting the shorting conductors; and a module having the bus bar mounted therein, the module further comprising at least one monitoring device monitoring at least one condition of the permanent magnet motor. - View Dependent Claims (6, 7, 8)
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9. A method for safely working with a plurality of power cables, the method comprising:
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coupling a first end of the plurality of power cables of a motor lead end to a permanent magnet motor; providing a plurality of clamps; selectively electrically coupling the clamps to a plurality of electrical conductors of a second end of the power cables; electrically coupling the clamps to a plurality of shorting conductors; electrically coupling the shorting conductors to a bus bar; and monitoring at least one condition of the permanent magnet motor. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification