Controlled switching devices and method of using the same
AssigneeVizimax Inc.
InventorsPierre Taillefer, Marc Lacroix
Life of this patent
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Abstract
It is disclosed a technique in which Controlled Switching Devices (CSDs) are used to control medium and high voltage circuit breakers to mitigate switching transients. This invention describes a method for controlling the closing of a circuit breaker to mitigate and/or eliminate the inrush current in capacitive loads such as capacitor banks and filters by taking into account the residual DC voltage charges that may be present in the load. It is disclosed a method to perform fast switching operations on capacitive loads and therefore eliminate the load discharge period.
Claims16
A method allowing fast switching of capacitive loads of an electrical circuit comprising a breaker, a capacitive load and being electrically fed with an electrical current, the method comprising the steps of providing the electrical circuit with a controlled switching device (CSD) adapted to send an open or close command to the breaker at any time prior to complete de-energization of the capacitive load in order to synchronize an open and close mechanical operation to reduce an inrush current sent to the electrical circuit.
An electric circuit allowing fast switching of capacitive loads, wherein the electrical circuit electrically is fed with an electrical current and comprises a breaker, at least one capacitive load outputting a residual voltage and a controlled switching device (CSD) adapted to send an open or close command to the breaker at any time prior to complete de-energization of the capacitive load in order to synchronize an open and close mechanical operation of the breaker to reduce an inrush current sent to the electrical circuit.
Use of a controlled switching device (CSD) in a circuit comprising a breaker and a capacitive load to send an open or close command to the breaker at any time prior to complete de-energization of the capacitive load in order to synchronize an open and close mechanical operation of the breaker to reduce an inrush current sent to an electrical circuit comprising the controlled switching device and at least one capacitive load.
Dependencies are inferred from the claim text.