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B or b+ differential protection device comprising two parallel concurrent modules

A technology of differential protection, equipment, applied in the electrical field, capable of solving problems such as known solutions are not satisfactory

Active Publication Date: 2018-07-17
黑格尔电镀物品股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] Therefore, the two known solutions aimed at simplifying Type B differential protection equipment are not satisfactory in view of the above functional limitations
Moreover, neither of the two known solutions involves devices of type B+

Method used

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  • B or b+ differential protection device comprising two parallel concurrent modules
  • B or b+ differential protection device comprising two parallel concurrent modules
  • B or b+ differential protection device comprising two parallel concurrent modules

Examples

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Embodiment Construction

[0032] The latter schematically shows the construction of a type B or type B+ differential protective device 1, which can detect the presence or absence of a circuit caused by at least two phase conductors 2 of a network or by at least one phase conductor of a network and a neutral conductor 2 of said network. 'A fault or leakage current in an electrical installation supplying power.

[0033] This device 1 comprises two separate detection and control modules 3 and 3', each module comprising at least one signal processing stage 4, 4', which on the one hand can and is used to adopt the and, on the other hand, to control an electromagnetic actuator, relay or similar breaking or opening device 5 of the device 1 when said fault signal exceeds a predetermined threshold value depending on the frequency, said detection and control module 3, 3' Each of these is functionally effective or operable over its own defined frequency range.

[0034] According to the invention, it is stipulate...

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PUM

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Abstract

The present invention relates to a B or B+ differential protection device for detecting leakage or fault current in an electrical system supplied by at least two phase conductors of a network or by atleast one phase conductor of a network and by one neutral conductor of said network. Said device (1) includes two separate detection and control modules (3 and 3'), each of which is functionally active or operational across a predetermined frequency range specific thereto. The invention is characterized in that the two modules (3 and 3') are independent of one another and are arranged so as to form two parallel and mutually independent detection channels that control the same actuator, relay or analog means (5) and in that each module (3, 3') is connected to its own specific means (6, 6') fordelivering a fault signal, the frequency domains of operation of the two aforementioned modules (3 and 3') partially overlapping.

Description

technical field [0001] The present invention relates to equipment and systems for the safety of goods and persons in the electrical field, and more particularly to personnel protection equipment for residual differential currents (or DDR), and is intended to include two independent detection modules of the B or B+ type operating in competition with each other differential protection equipment. Background technique [0002] Differential protection devices are usually integrated in domestic or third-party electrical installations, upstream or at the entrance of various power supply circuit trees on site, or closer to the receivers they respectively affect. [0003] Typically these electrical devices are powered by an AC network and protective devices of the type described above are designed primarily to ensure personal safety by detecting as quickly as possible any leakage in any circuit or receiver to be protected that may lead to earth. Such leakage is caused, for example, ...

Claims

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Application Information

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IPC IPC(8): H02H3/33H02H3/34H02H3/347
CPCH02H3/33H02H3/332H02H3/34H02H3/347
Inventor H·谢托尼
Owner 黑格尔电镀物品股份公司
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