Current supply components for overcurrent protective devices

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

Inactive Publication Date: 2015-11-25
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 supply components for overcurrent protective devices
  • Current supply components for overcurrent protective devices
  • Current supply components for overcurrent protective devices

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Embodiment Construction

[0046] In order to have a clearer understanding of the technical features, purposes and effects of the invention, the specific implementation of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals represent parts that are identical or similar in structure but identical in function.

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

[0048] The solution proposed by the present invention will be described below by taking the residual current protection device as an example. figure 1 It is a structural schematic diagram of a current supply assembly for providin...

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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 invention relates to a current supply component, in particular to a residual current component which can provide low voltage and high current to a circuit breaker load. Background technique [0002] Electronic protection devices generally include electronic parts and mechanical parts. Taking the residual current protection device (referred to as RCD) as an example, the electronic part of the protection device includes a residual current detection sampling circuit, a comparison circuit, a trigger circuit, etc., and the sampling circuit (such as a zero-sequence current transformer ZCT) can detect the residual current in the power supply line. The residual current, and output the sampling signal; the sampling signal is filtered and amplified by the operational amplifier and then sent to the micro-program controller (hereinafter referred to as MCU) for comparison and judgment. ) provides current. As residual current protection devices are more and mo...

Claims

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Application Information

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