Magnetic tripping device and overcurrent tripping device of an electrical switch and electrical switch and method for calibrating the magnetic tripping of a magnetic tripping device

Patent metadata

Field	Value
Publication number	US-9425013-B2
Application number	US-201414572830-A
Country	US
Kind code	B2
Filing date	Dec 17, 2014
Priority date	Feb 21, 2014
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

An overcurrent tripping device of an electrical switch for interrupting a current flow in an electrical circuit in the event of the occurrence of an overload or a short circuit is disclosed. In an embodiment, the overcurrent tripping device includes a thermal tripping device and a magnetic tripping device. A magnetic tripping device is disclosed which, in an embodiment, includes at least one yoke element for generating a magnetic field, an armature element responding to the magnetic field, and a spring element. The armature element is arranged on an armature carrier element, separated from the yoke element, by way of a first armature element end and is mounted pivotably about an armature element rotation axis. In addition, an electrical switch including an overcurrent tripping device, and a method for calibrating magnetic tripping of a magnetic tripping device of an electrical switch, are disclosed.

First claim

What is claimed is:

1. A magnetic tripping device of an electrical switch for interrupting a current flow in an electrical circuit in the event of the occurrence of a short circuit, the magnetic tripping device comprising:
at least one yoke element to generate a magnetic field depending on a current intensity of an electric current flowing through a current-conducting element;
an armature element, configured to respond movably to a changing magnetic field; and
a spring element, configured to define a current threshold value for the movement of the armature element, wherein the armature element is arranged on an armature holding element that holds the armature element at a first armature element end, separated from the yoke element, via the first armature element end and is mounted pivotably about an armature element rotation axis, and wherein the armature holding element includes an adjusting element mounted thereon to interact with the spring element.

2. The magnetic tripping device of claim 1 , wherein the adjusting element is an adjusting screw.

3. The magnetic tripping device of claim 1 , wherein the armature holding element is variably positionable with respect to the yoke element.

4. The magnetic tripping device of claim 3 , wherein at least the armature holding element comprises a nonmagnetic material.

5. The magnetic tripping device of claim 1 , wherein at least the armature holding element comprises a nonmagnetic material.

6. An overcurrent tripping device of an electrical switch for interrupting a current flow in an electrical circuit in the event of the occurrence of an overload or a short circuit, the overcurrent tripping device comprising:
a thermal tripping device to interrupt the current flow in the event of an overload; and
a magnetic tripping device to interrupt the current flow in the event of a short circuit, the magnetic tripping device being configured as claimed in claim 1 .

7. An electrical switch, for interrupting a current flow in an electrical circuit in the event of the occurrence of an overload or a short circuit, comprising:
at least one overcurrent tripping device configured as claimed in claim 6 .

8. The magnetic tripping device of claim 1 , wherein the armature element is positionally adjustable relative to the at least one yoke element.

9. The magnetic tripping device of claim 1 , wherein the armature element is mounted in a groove formed in a surface of the armature holding element.

10. The magnetic tripping device of claim 1 , wherein the armature holding element has a stop extending substantially perpendicular from a base region of the armature holding element, the stop being between the armature element and the adjusting element.

11. A method for calibrating magnetic tripping of a magnetic tripping device of an electrical switch, comprising at least one of:
variably positioning an armature holding element, for rotatably mounting an armature element about an armature element rotation axis, taking into consideration at least one of an arrangement and configuration of a yoke element for generating a magnetic field, with respect to the yoke element; and
moving an adjusting element mounted on the armature holding element for rotatably mounting an armature element about the armature element rotation axis, along an adjusting element axis, with the result that at least one position of at least one spring element end of a spring element connected to the adjusting element is varied in order to set a current threshold value.

12. The method of claim 11 , a magnetic tripping device is used.

Assignees

• Siemens Ag

Inventors

• Augusta Zbynek
• Himmelein Frank
• Musil Filip

Classifications

• H01H71/2472 Primary

  with rotatable armatures · CPC title

• H01H50/18

  Movable parts of magnetic circuits, e.g. armature · CPC title

• H01H71/40

  Combined electrothermal and electromagnetic mechanisms · CPC title

• H01H50/64 Primary

  Driving arrangements between movable part of magnetic circuit and contact (structurally associated with contact spring sets H01H50/58) · CPC title

• H01H2071/407

  the thermal element being heated by the coil of the electromagnetic mechanism · CPC title