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Current supplying component of current protection device

A protection device and current technology, applied in the direction of conversion equipment without intermediate conversion to AC, can solve problems such as load burnout and inability to break

Inactive Publication Date: 2013-01-02
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the residual current protection device works within its rated voltage range, such as 85 ~ 440VAC, the current flowing through the load can be broken smoothly, but if the working voltage of the residual current protection device exceeds its rated working voltage, the two ends of the breaking mechanism that controls the load current The high voltage makes them impossible to break, causing the load to burn out

Method used

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  • Current supplying component of current protection device
  • Current supplying component of current protection device
  • Current supplying component of current protection device

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Embodiment Construction

[0046] In order to have a clearer understanding of the technical features, objectives and effects of the invention, specific embodiments of the invention will now be described with reference to the accompanying drawings. The same reference numerals in each figure indicate the same or similar parts with the same function.

[0047] In order to make the drawings concise, each figure only schematically shows the parts related to the present invention, and they do not represent the actual structure of the product as a product. In addition, in order to make the drawings concise and easy to understand, in some drawings, only one of the components with the same structure or function is schematically shown, or only one of them is marked.

[0048] The following will take the residual current protection device as an example to describe the solution proposed by the present invention. figure 1 It is a schematic structural diagram of a current supply assembly for providing driving current for a t...

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Abstract

The invention provides a current supplying component of a current protection device. The current supplying component comprises a power supply module and a low-voltage high current module. The power supply module supplies electricity for the low-voltage high current module; the low-voltage high current module comprises a low-voltage voltage limiting unit and a relay unit; loads of a tripping mechanism in the protection device are connected in parallel to two ends of the low-voltage voltage limiting unit; a protection triggering signal is responded, the relay unit conducts an access of the low-voltage voltage limiting unit, thus high current under low voltage is provided for the loads of the tripping mechanism; and the current supplying component can meet the small volume requirement of the protection device, the material cost of the protection device is reduced, and meanwhile low voltage and high current can be provided for the loads.

Description

Technical field [0001] The present invention relates to a current supply assembly, in particular to a residual current assembly that can provide low voltage and large current to a circuit breaker load. Background technique [0002] Electronic protection devices generally include electronic parts and mechanical parts. Take the residual current protection device (RCD for short) as an example. The electronic part of the protection device includes a residual current detection and sampling circuit, a comparison circuit, a trigger circuit, etc., among which the sampling circuit (such as a zero sequence current transformer ZCT) can detect the power supply line Residual current, and output the sampling signal; the sampling signal is filtered and amplified by the operational amplifier and then sent to the microprogram controller (hereinafter referred to as MCU) for comparison and judgment. The MCU outputs the trigger signal, and passes the trigger circuit to the load of the trip mechanism...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/16
Inventor 包章尧熊焘陈曦
Owner SIEMENS AG
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