Back to results
US 10,096,993 B2Granted
Controlled switching devices and method of using the same
AssigneesVizimax Inc., Eric Sleigh
InventorsPierre Taillefer, Eric Sleigh
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneesVizimax Inc., Eric Sleigh
InventorsPierre Taillefer, Eric Sleigh
Estimating the term…
It is disclosed a technique to reduce significantly the arc flash incident energy in commercial and industrial electrical installations connected to typical electric distribution networks, by limiting transformer inrush current and allowing more sensitive protection settings. It also disclosed a technique to increase the energy capacity of these installations. Inrush current reduction is achieved through the use of a Controlled Switching Device (CSD). It is disclosed a method for lowering an arc flash inside an electrical circuit comprising a breaker and being electrically fed with an electrical current, the method comprising the step of providing the electrical circuit with a CSD adapted to send an open or close command to the breaker in order to synchronize an open and close mechanical operation, preferably at an optimal electrical angle. It is also disclosed an electric circuit comprising a CSD for lowering an arc flash inside the circuit.
A method for lowering an arc flash incident energy level to harmless levels inside an electrical circuit of a commercial or industrial electrical installation, the electric circuit comprising a circuit breaker connected to an overcurrent protection relay, and being electrically fed with an electrical current, the method comprising the steps of:
An electric circuit of a commercial or industrial electrical installation comprising a circuit breaker connected to an overcurrent protection relay, and being electrically fed with an electrical current, wherein the electric circuit further comprises a controlled switching device (CSD) adapted to send a close command to the circuit breaker in order to synchronize the closing of the breaker at an optimal electrical angle to reduce the inrush current, the overcurrent protection relay having sensitivity adapted to obtain shorter fault clearing times for lowering an arc flash incident energy level inside the electrical circuit to harmless levels.
A method for lowering an arc flash incident energy level inside an electrical circuit of a commercial or industrial electrical installation, the electric circuit comprising a breaker and being electrically fed with an electrical current via an electric distribution system comprising a fuse, the fuse being connected to the breaker, the method comprising:
An electric circuit of a commercial or industrial electrical installation being electrically fed with an electrical current via an electric distribution system comprising a fuse, the electric circuit comprising a circuit breaker and a controlled switching device (CSD) adapted to send close command to the circuit breaker in order to synchronize the closing of the circuit breaker, the CSD being adjusted to close the circuit breaker of the electric circuit at an optimal electrical angle to reduce the inrush current for lowering an arc flash incident energy level inside the electrical circuit, the size of the fuse being adapted as a function of potential inrush current.
Dependencies are inferred from the claim text.