US 2022/0108853 A1 · CIRCUIT BREAKER HAVING INTERNAL TRANSIENT RECOVERY VOLTAGE CAPACITOR ASSEMBLY

Abstract

A circuit breaker having at least one capacitor assembly connected in parallel across a contact of the circuit breaker. The capacitor assembly can be housed with the contact within a sealed enclosure of the circuit breaker. The enclosure can be configured to house an insulating medium that is configured to reduce or quench an arc(s) that may form at least when the contact of the circuit breaker is displaced from a closed position to an open position. The capacitor assembly, which includes a transient recovery voltage (TRV) capacitor, can be configured to delay terminal fault and short line fault TRV and the rate of rise of the initial TRV (ITRV) that can appear across the open contact of the circuit breaker.

Claims20

Dependent claims

A circuit breaker comprising:

an enclosure having an inner region;
a contact housed within the inner region of the enclosure, a first side of the contact electrically coupled to a first electrical conductor of the circuit breaker, a second side of the contact electrically coupled to a second electrical conductor of the circuit breaker;
and
a capacitor assembly housed within the inner region of the enclosure and connected in parallel across the contact, the capacitor assembly including a transient recovery voltage capacitor.

1 more element

An apparatus comprising:

an enclosure having an interior region;
a circuit interrupter housed within the interior region, the circuit interrupter having a first contact assembly and a second contact assembly, the second contact assembly comprising at least one stationary contact and a second shield, the first contact assembly comprising at least one moveable contact and a first shield, the at least one moveable contact configured to be:
in contact with the at least one stationary contact when the circuit interrupter is in an electrically closed configuration, and
displaced from contact with the at least one stationary contact when the circuit interrupter is in an electrically open configuration;
and
at least one capacitor assembly housed within the interior region of the enclosure, the at least one capacitor assembly comprising a transient recovery voltage capacitor, a first end of the at least one capacitor assembly being in electrical contact with the first shield, and a second end of the at least one capacitor assembly being in electrical contact with the second shield.

3 more elements

An apparatus comprising:

at least one pole assembly having a first electrical conductor, a second electrical conductor, an enclosure, a circuit interrupter, and at least one capacitor assembly, the circuit interrupter and the at least one capacitor assembly housed within an interior region of the enclosure, the at least one capacitor assembly having a transient recovery voltage capacitor connected in parallel across a contact of the circuit interrupter.

Dependencies are inferred from the claim text.

Facts

Application

17/419,153Filed 18 Dec 2019

Priority

31 Dec 2018

Published

7 Apr 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

H01H 33/16
Means for extinguishing or preventing arc between current-carrying parts: impedances connected with contacts
H01H 33/165
Impedances connected with contacts: details concerning the impedances
H01H 9/30
Details of switching devices, not covered by groups H01H1/00 - H01H7/00: means for extinguishing or preventing arc between current-carrying parts
H01H 9/42
Means for extinguishing or preventing arc between current-carrying parts: impedances connected with contacts

Circuit breaker having internal transient recovery voltage capacitor assembly

Life of this patent

Circuit breaker having internal transient recovery voltage capacitor assembly

Life of this patent

Abstract

Claims20