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Overvoltage protection method in system connected with power supply network, overvoltage protective apparatus and equipment provided with the overvoltage protective apparatus

A technology for protecting equipment and overvoltage, which is applied to emergency protection circuit devices, protection that reacts to overvoltage, emergency protection devices that automatically disconnect, etc., and can solve problems such as equipment damage and personnel casualties

Inactive Publication Date: 2013-10-16
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a fault current flowing from a first incoming line to a second outgoing line is artificially generated at this time, electrical separation is no longer possible and this can also lead to equipment damage, personal injury or death

Method used

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  • Overvoltage protection method in system connected with power supply network, overvoltage protective apparatus and equipment provided with the overvoltage protective apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] A small power grid (for example the power grid of a production plant or a household power grid) is connected to a power supply network via a fault current circuit breaker 10 . figure 1 The illustration is for a single-phase system comprising a phase conductor L and a neutral conductor N, but the invention is also applicable to a multi-phase system, especially a three-phase system.

[0021] The fault current circuit breaker 10 bridges a line section 12a which is separated or leads to the supply network with a line section 12b which belongs to or leads to the system to be connected. To this end, the connections 14 a and 14 b of the fault current circuit breaker 10 are connected or connectable to one another internally via a line section 12 c and a line section 12 d , which are separated from one another by a switching element 16 . Switching element 16 is closed in a basic state, in which case line section 12a, line section 12c, switching element 16, line section 12d and l...

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PUM

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Abstract

The method involves coupling a system with a current supply network by a circuit breaker, particularly a fault-current circuit breaker (10). An electric or magnetic field is generated through an evaluation device (32), so that the field acts directly on a releasing element (26). The releasing element releases a latch (24), and one contact element (16,22) is opened. Independent claims are included for the following: (1) an over voltage protection device with two input terminals; and (2) an arrangement with a circuit breaker.

Description

technical field [0001] The invention relates to a method of protection when predetermined conditions occur in a system connected to a power supply network. The essence of this method is to disconnect the systems connected to the supply network from the supply network in the event of an overvoltage in the supply network. The system connected to this power supply network can be a small auxiliary grid, comprising at least several lines, wherein generally useful electrical equipment is connected to these lines. A protective switch is usually provided in the area of ​​the coupling of the system to the supply network. A typical example of such a protective switch is a fault current protective switch. A protective switch causes electrical separation between the supply network and connected systems when predetermined conditions are met. A plurality of switching elements are arranged inside the protection switch. These switching elements are acted upon by a blocking device to open ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/20
CPCH02H3/334H02H3/20
Inventor 汉斯-约尔根·胡伯曼弗雷德·克雷迈尔阿尔门·斯塔尔
Owner SIEMENS AG