Unlock instant, AI-driven research and patent intelligence for your innovation.

Surge arrester arrangement having at least one varistor dissipation element

A discharge device and overvoltage protection technology, applied in the field of overvoltage protection discharge devices, can solve the problems of uncontrollable aging, frequent, diode die failure, etc.

Inactive Publication Date: 2013-08-21
DEHN SOHNE GMBH CO KG
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of such varistors for overvoltage protection include mediocre absorption capacity, barely controllable aging and relatively high intrinsic capacitance
Very frequent and also very high-energy discharges up to the limit discharge current can cause the above-mentioned diode die to fail, thereby forming a negative for the connected current grid supply without the failed varistor reacting to the thermal cut-out device. short circuit

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Surge arrester arrangement having at least one varistor dissipation element
  • Surge arrester arrangement having at least one varistor dissipation element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] according to figure 1 , a varistor (Varistor, piezoresistor) 2 is connected between the external connectors A and B.

[0027] The varistor 2 can be disconnected via a disconnection device 3 which can be triggered to open thermally.

[0028] Between points a and c there is a conductor segment or a bridge, so that an electrical connection is made in the untriggered open state.

[0029] in press figure 2 In state 3 ′ of , the disconnecting device is triggered open and a connection is established on the path a to b by means of the short-circuit bar 4 which is connected across the varistor 2 . Or as an alternative, a fuse (wire) can be provided instead of the short-circuit bow 4 , which receives the current and reacts when its maximum load value is reached. figure 2 The actuated or triggered state is shown between the points a and b with a dotted line. After the solder has blown off, the switching movement of the device 3 can be carried out under the action of a compre...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a surge arrester arrangement having at least one varistor dissipation element and also to a disconnection apparatus in order to disconnect the at least one varistor dissipation element from the power supply system, wherein the disconnection apparatus is incorporated in the electrical connection path of the arrester arrangement. According to the invention, a current limiting resistor is connected in series to the varistor dissipation element in the electrical connection path in order to reduce the short-circuit current of the connected power supply system when the disconnection apparatus does not respond and there is an overload short-circuit state in the interior of the varistor dissipation element.

Description

technical field [0001] The invention relates to an overvoltage protective discharge device comprising at least one varistor discharge element and a disconnecting device for disconnecting the at least one varistor discharge element from the network, wherein the disconnecting device is integrated in a connection circuit of the discharge device , as stated in the preamble of claim 1. Background technique [0002] An overvoltage protection circuit for communication systems is known from DE 60 216 984 T2, wherein the circuit comprises a metal oxide varistor (metal oxide varistor) and a gas discharge device connected in series. [0003] Due to the difference in capacitance between the metal oxide varistor and the gas discharge device, a capacitive voltage divider is created consisting of these two components, and almost the entire voltage is applied to the gas discharge device, so that a voltage appears on the supply line The gas discharge device activates the metal oxide varisto...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04H01C7/12
CPCH01C7/10H01C7/12H01H9/54H01H85/44H02H9/042H02H9/06Y02E10/56
Inventor H·希尔施曼E·策纳
Owner DEHN SOHNE GMBH CO KG