DC current interruption system able to open a DC line with inductive behaviour
First Claim
1. DC current interruption system for opening a DC line with inductive behaviour, comprising a primary mechanical breaker, a secondary mechanical breaker and an electronic overvoltage protection circuit comprising at least one transistor, further comprising an electronic opening system comprising a passive circuit to auto-bias the electronic overvoltage protection circuit upon the opening of said primary mechanical breaker, so as to trigger a switching of said at least one transistor making it possible to limit a voltage and a current in the DC line, with a total interruption of said DC line being obtained by subsequent opening of said secondary mechanical breaker,wherein said electronic overvoltage protection circuit comprises a plurality of field effect transistors mounted in parallel, switch to an ohmic mode in a first step after opening of said primary breaker, then to a breakdown mode in a second step when the voltage reaches a predetermined value, andsaid electronic overvoltage protection circuit further comprising a breakdown balancing system, making it possible to operate in breakdown mode quasi-simultaneously said plurality of field effect transistors.
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Accused Products
Abstract
The invention pertains to a DC current interruption system able to open a DC line with inductive behavior, comprising a primary mechanical breaker (S0), a secondary mechanical breaker (S1) and an electronic overvoltage protection circuit (B1, B2) comprising at least one transistor. The DC current interruption system of the invention furthermore comprises an electronic opening system (72, 76) comprising a passive circuit able to auto-bias the electronic protection circuit (B1, B2) upon the opening of said primary mechanical breaker (S0), so as to trigger a switching of said at least one transistor (M1, M2, IG1) making it possible to limit the voltage and the current in the DC line, total interruption of said DC line being obtained by subsequent opening of said secondary mechanical breaker (S1).
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Citations
9 Claims
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1. DC current interruption system for opening a DC line with inductive behaviour, comprising a primary mechanical breaker, a secondary mechanical breaker and an electronic overvoltage protection circuit comprising at least one transistor, further comprising an electronic opening system comprising a passive circuit to auto-bias the electronic overvoltage protection circuit upon the opening of said primary mechanical breaker, so as to trigger a switching of said at least one transistor making it possible to limit a voltage and a current in the DC line, with a total interruption of said DC line being obtained by subsequent opening of said secondary mechanical breaker,
wherein said electronic overvoltage protection circuit comprises a plurality of field effect transistors mounted in parallel, switch to an ohmic mode in a first step after opening of said primary breaker, then to a breakdown mode in a second step when the voltage reaches a predetermined value, and said electronic overvoltage protection circuit further comprising a breakdown balancing system, making it possible to operate in breakdown mode quasi-simultaneously said plurality of field effect transistors.
Specification