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Protecting equipment, protecting device and protecting method for circuit

A technology of protection device and protection equipment, applied in circuit devices, emergency protection devices with automatic disconnection, emergency protection circuit devices, etc., can solve the problem that continuous power supply cannot be guaranteed.

Inactive Publication Date: 2003-02-05
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The disadvantage of the above is that in all cases a false release will result in a shutdown, whereby continuous power supply cannot be guaranteed

Method used

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  • Protecting equipment, protecting device and protecting method for circuit
  • Protecting equipment, protecting device and protecting method for circuit
  • Protecting equipment, protecting device and protecting method for circuit

Examples

Experimental program
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Embodiment Construction

[0036] In the following text, the same parts in the figures are designated by the same reference numerals or similar reference numerals as appropriate.

[0037] First the situation of the current loop is described, and then the function is described in detail.

[0038] FIG. 1 shows a protective device 1 and a protective device 2 as a secondary part of a single-phase current circuit 3 . The current loop 3 includes a circuit with an associated voltage U Netz power supply, consisting of the first and second impedance elements L i and R i Composed grid impedance Z, its belonging first and second impedance voltage U Li and U Ri are shown in parallel here. In addition, the current loop 3 also includes an assumed load L LR , which consists of a reactance L and a resistance R. Corresponding to them are the first and second load voltage U L and U R .

[0039] load L LR It is connected via line 5 to a power source, such as a generator G of a power plant or a supply transforme...

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PUM

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Abstract

The present invention relates to protecting equipment, protecting device and protecting method for circuit, wherein, in order to get continuous power supply by electric line (5) protection system (1) even in the circumstances of the influence caused by disturbance that may be appear, the protection system (1) having two fault sensors (4a,4b). The first (4a) is in active connection to a semiconductor switch (6) fitted in the line (5), which sends, when a first trigger condition is fulfilled, a disconnection signal (7a) to the switch (6), which causes it to open the line circuit. The second sensor (4b) interrupts the disconnection operation when a second triggers condition is not satisfied.

Description

technical field [0001] The invention relates to a protection device, a protection device and a protection method for electric lines, wherein the desired release condition is given or implemented by means of a determinable release condition via first and second evaluation components which are functionally connected to a semiconductor switch Protective function. [0002] In this case, the evaluation unit has a protective function against overcurrent, while the semiconductor switch is used as a protective switch. A protective switch is to be understood here as a switch or a switching device which changes the switching state in response to a switching signal. The switch has a sufficiently large switching capacity when opening or closing a line, a drive, a consumer or a part of a device, especially in the event of a short circuit. Background technique [0003] The basic protective function of the evaluation unit is to prevent overcurrents, in particular short-circuit currents, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H1/04H02H3/08H02H3/40H03K17/0814H03K17/082
CPCH03K17/08142H03K17/0822H02H3/40H02H3/08H02H1/04
Inventor 莱因哈德·梅尔迈克尔·施罗克
Owner SIEMENS AG