Alternator circuit-breaker with an inserted resistance
AssigneeAreva T&D SA
InventorsJean-Marc Willieme, Francois Biquez, Denis Frigiere
Life of this patent
Estimating the term…
Abstract
An alternator disconnector circuit-breaker of the invention presents a resistance (30) in series with the circuit-breaker switch (20′); the resistance (30) is of fixed ohmic value that is about 104 times greater than the value of the resistance of the main circuit of the circuit-breaker. By means of this configuration, it is possible to use a vacuum chamber as the circuit-breaker switch (20′), and to dimension the main switch (10), which, de facto, breaks the current even for very high short-circuit currents, under more advantageous conditions.
Claims12
An alternator disconnector circuit-breaker comprising:
- a main first switch having a first pair of contacts that are mounted to move relative to each other in translation along a first axis, the main switch comprising an interrupting chamber of a gas-insulating circuit-breaker;
- a short-circuit auxiliary second switch having a second pair of contacts that are mounted to move relative to each other, the second switch being put in parallel with the first switch;
- the second switch being associated in series with a resistor of set value;
- and
- synchronization means making it possible, while breaking, for the contacts of the first switch to separate before the contacts of the second switch separate;
- wherein the resistance of the first switch (10) is on the order of 10−6 to 10−4 Ω, and the associated resistance is on the order of 0.1 to 40 Ω.
A circuit-breaker according to 1, in which the first switch is a circuit-breaker comprising two switches in parallel.
An alternator disconnector circuit-breaker comprising:
- a main first switch having a first pair of contacts that are mounted to move relative to each other in translation along a first axis, the main switch comprising an interrupting chamber of a gas-insulating circuit-breaker;
- a short-circuit auxiliary second switch having a second pair of contacts that are mounted to move relative to each other, the second switch being put in parallel with the first switch;
- the second switch being associated in series with a resistor of set value;
- and
- synchronization means making it possible, while breaking, for the contacts of the first switch to separate before contacts of the second switch;
- wherein the resistance of the first switch is on the order of 10−6 to 10−4Ω, and the associated resistance is on the order of 104 to 105 times the resistance of the first switch.
Dependencies are inferred from the claim text.