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Fireproof switch and method

A switch and associated technology, applied to electric switches, switches operating due to overcurrent and arc faults, parts of emergency protection devices, etc., can solve problems such as unclear where the fault is

Pending Publication Date: 2022-03-01
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this type of three- or four-pole fireproof switch for three-phase AC networks is that in the case of a fault it is not clear where the fault is

Method used

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Examples

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Embodiment Construction

[0038] figure 1 A first block diagram of the fire protection switch AFD according to the invention is shown. The fire switch has three energy source-side connections L1 , L2 , L3 for the three phase lines of the three-phase AC circuit. On the side of the energy sink, the three phase lines passing through the fire switch AFD are connected to the energy sink LOAD. The fire protection switch AFD can be connected before or after the power protection switch MCB for interrupting the electrical circuit. Furthermore, an interrupting unit, for example with contacts, can be present in the flameproof switch AFD for interrupting the electrical circuit. Neither of these are in figure 1 shown in .

[0039] Three phase lines L1, L2, L3 are associated with the sensor unit. For example, the sensor unit may be composed of multiple sensor subunits, such as the first, second and third sensor subunits CT1, CT2, and CT3 for collecting current parameters of an electrical three-phase AC circuit,...

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Abstract

The invention relates to a fire switch for an electrical three-phase AC circuit having three phase lines, comprising: a sensor unit associated with the three phase lines for detecting electrical variables of the three-phase AC circuit, a control unit connected to the sensor unit, the circuit is used for analyzing the electrical parameters, determining series and / or parallel fault arcs and outputting fault arc identification signals to interrupt the electrical three-phase alternating current circuit. According to the invention, a display unit is provided, which is designed in such a way that, in the event of a fault arc, the phase reference of the fault arc occurring is displayed.

Description

[0001] This application is a divisional application of a patent application with an application date of June 27, 2018, a Chinese patent application number of 201810678526.3, and an invention title of "Fireproof Switch and Method". technical field [0002] The invention relates to a fire switch according to the invention for an electrical three-phase AC circuit and to a method according to the invention. Background technique [0003] Flame breakers are a relatively new type of protection device for electric circuits or power supply networks, which are used to identify fault arcs, eg parallel or series (fault) arcs. The fire switch is also called arc fault detection device (Arc Fault Detection Device), referred to as AFDD, or arc fault circuit interrupter (Arc Fault Circuit Interrupter), referred to as AFCI. Arc faults, sometimes called disturbance arcs, may be formed by poorly clamped electrical connections in distribution boxes or receptacles or by poor insulation and contac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H1/00H02H7/26
CPCH02H1/0015H02H7/26H01H9/50H02H3/042H01H2083/201G01R31/52
Inventor V.G.丹拉吉A.休伯J-M.马特尔C.迈尔
Owner SIEMENS AG