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US 7,079,367 B1Granted
Electric plant and method and use in connection with such plant
AssigneeABB Technology AG
InventorLars Liljestrand
Life of this patent
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AssigneeABB Technology AG
InventorLars Liljestrand
Estimating the term…
An electric plant with a safety device, a method for remedying faults in a switchgear installation, and the use of a closing contact to provide security against faults. The plant includes a switchgear installation, consumer loads connected to the switchgear installation, and at least one feeder cable to the switchgear installation. The plant provides a strong consumer network that still has a high degree of safety against damage caused by short-circuiting faults. The plant includes at least two feeder cables, each connected to its own current source such as a transformer or a generator. At least one of the feeder cables is connected by a branch cable to ground. The branch cable is provided with a closing contact, which is normally open. The closing contact is arranged to be activated, i.e. to quickly close the connection to ground, in the event of short-circuiting in the switchgear installation.
An electric plant with a safety device comprising:
A plant as claimed in 7, wherein the first closing contact is configured to be reset after current has been disconnected.
An electric plant with a safety device comprising:
A method for remedying faults in an electric plant comprising a switchgear installation with a busbar and a first feeder cable and a second feeder cable connected to the busbar of the switchgear installation, the feeder cables connected to at least one current source, wherein a first branch cable is connected to ground through a first closing contact and is connected to the first feeder cable, wherein a second branch cable is connected to ground through a second closing contact and is connected to the second feeder cable, and each closing contact is configured to be normally open and to close in an event of short-circuiting in the switchgear installation, the method including closing at least one of the closing contacts in the event of a short circuit.
The use of first and second closing contacts in an electric plant comprising a switchgear installation, a consumer load connected to the switchgear installation, and first and second feeder cables connected to the switchgear installation and connected to at least one current source, the first feeder cable being connected to a first branch cable and to ground through the first closing contact, the second feeder cable being connected to a second branch cable and to ground through the second closing contact, and each closing contact configured to be normally open and to close in an event of short-circuiting in the switchgear installation.
Dependencies are inferred from the claim text.