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US 10,741,350 B2Granted
Electrical protection unit including a current limiter device
AssigneeSchneider Electric Industries SAS
InventorsMichel Rapeaux, Eric Domejean
Life of this patent
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AssigneeSchneider Electric Industries SAS
InventorsMichel Rapeaux, Eric Domejean
Estimating the term…
An electrical protection unit A including a main conductor and, for each main conductor, a current limiter device connected in series with the main conductor to limit the current when a current or temperature threshold is exceeded, the limiter device including an element made of a material having a positive temperature coefficient, called PTC, and being capable of controlling a device for tripping the mechanism M for opening the contacts of the protection unit D, to cause the opening of the contacts of the unit when the threshold is exceeded leading to a change of state of the element between a low resistance state and a high resistance state. The PTC element includes the trip device, in such a way that this element itself provides the functions of fault current limitation and of tripping the mechanism for opening the contacts.
An electrical protection unit comprising at least one main conductor and, for the or each main conductor, at least one current limiter device connected in series with said main conductor in order to limit a current when a current or temperature threshold is exceeded, said limiter device including a PTC element made of a material having a positive temperature coefficient and being capable of controlling trip means for tripping a mechanism for opening contacts of the protection unit, so as to cause opening of the contacts of the unit when said threshold is exceeded leading to a change of state of said element between a low resistance state and a high resistance state,
An electrical protection unit comprising at least one main conductor and, for the or each main conductor, at least one current limiter device connected in series with said main conductor in order to limit a current when a current or temperature threshold is exceeded, said limiter device including a PTC element made of a material having a positive temperature coefficient and being capable of controlling trip means for tripping a mechanism for opening contacts of the protection unit, so as to cause opening of the contacts of the unit when said threshold is exceeded leading to a change of state of said element between a low resistance state and a high resistance state,
An electrical protection unit comprising at least one main conductor and, for the or each main conductor, at least one current limiter device connected in series with said main conductor in order to limit a current when a current or temperature threshold is exceeded, said limiter device including a PTC element made of a material having a positive temperature coefficient and being capable of controlling trip means for tripping a mechanism for opening contacts of the protection unit, so as to cause opening of the contacts of the unit when said threshold is exceeded leading to a change of state of said element between a low resistance state and a high resistance state,
Dependencies are inferred from the claim text.