Circuit breaker

Patent metadata

Field	Value
Publication number	US-10818462-B2
Application number	US-201716086613-A
Country	US
Kind code	B2
Filing date	Mar 22, 2017
Priority date	Mar 22, 2016
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

A circuit breaker includes a short-circuit trip and an overcurrent trip. The short-circuit trip has a trip coil, and the overcurrent trip has a bimetallic element. A first terminal of the trip coil is conductively connected to a fixed contact carrier of the circuit breaker. The bimetallic element is connected in series with the trip coil. The bimetallic element is connected at least indirectly to a first connection terminal of the circuit breaker, and the first connection terminal is connected to the fixed contact carrier by a bypass line.

First claim

The invention claimed is:

1. A circuit breaker, comprising:
a fixed contact carrier;
a first connection terminal;
a bypass line;
a short-circuit trip comprising a trip coil having a first terminal; and
an overcurrent trip comprising a bimetallic element,
wherein the first terminal of the trip coil is conductively connected to the fixed contact carrier,
wherein the bimetallic element is connected in series with the trip coil,
wherein the bimetallic element is connected at least indirectly to the first connection terminal, and
wherein the first connection terminal is connected to the fixed contact carrier by the bypass line.

2. The circuit breaker according to claim 1 , wherein a second terminal of the trip coil is conductively connected to the bimetallic element by a flexible conductor.

3. The circuit breaker according to claim 1 , wherein the bimetallic element is fastened to a terminal bracket of the first connection terminal.

4. The circuit breaker according to claim 1 , wherein an adjustment apparatus for adjusting the bimetallic element is arranged on the first connection terminal, and
wherein the bimetallic element is fastened to the adjustment apparatus by a first bimetallic element end.

5. The circuit breaker according to claim 4 , wherein the adjustment apparatus has a threaded opening which is arranged so as to be spaced apart from the bimetallic element and in which an adjustment screw is arranged.

6. The circuit breaker according to claim 5 , wherein the adjustment screw is mounted in a housing part of the circuit breaker in such that an angle between the adjustment apparatus and the first connection terminal is altered when the adjustment screw is rotated.

7. The circuit breaker according to claim 1 , wherein the bimetallic element is arranged within the circuit breaker so as to be adjacent to the trip coil, substantially in parallel with a longitudinal extension of the trip coil.

8. The circuit breaker according to claim 1 , wherein the bimetallic element is fastened to the first connection terminal.

9. The circuit breaker according to claim 1 , wherein a terminal bracket of the first connection terminal is connected to the fixed contact carrier by the bypass line.

Assignees

• Eaton Intelligent Power Ltd

Inventors

• Tetik Adolf
• Nyzner Alfred

Classifications

• H01H71/2463 Primary

  with plunger type armatures · CPC title

• H01H71/40

  Combined electrothermal and electromagnetic mechanisms · CPC title

• H01H71/402 Primary

  in which the thermal mechanism influences the magnetic circuit of the electromagnetic mechanism · CPC title

• H01H71/7436

  Adjusting the position (or prestrain) of the bimetal (H01H71/7445 takes precedence) · CPC title

• H01H71/48

  with provision for short-circuiting the electrical input to the release mechanism after release of the switch, e.g. for protection of heating wire · CPC title