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A non-contact passive spd backup protection circuit breaker

A back-up protection, circuit breaker technology, applied in emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, circuit devices, etc., to avoid inaction or malfunction

Active Publication Date: 2022-01-04
YUEQING BEIJIAER ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention proposes a non-contact passive SPD backup protection circuit breaker in order to solve the problems existing in the above existing active SPD backup protection circuit breaker

Method used

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  • A non-contact passive spd backup protection circuit breaker
  • A non-contact passive spd backup protection circuit breaker
  • A non-contact passive spd backup protection circuit breaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment one: combine below figure 1 with figure 2 This embodiment will be described in detail.

[0047] The non-contact passive SPD backup protection circuit breaker described in this embodiment includes:

[0048] The current mutual inductance module is used to convert the overcurrent on the power frequency phase line connected to the surge protector into the target detection current;

[0049] A rectification module, used to rectify the target detection current;

[0050] The current detection module is used to judge that the overcurrent is a surge current or a surge protection failure current according to the size of the rectified target detection current, and when the judgment result is a surge current, guide the target detection current into the power supply ground, and when it is judged When the result is the surge protection failure current, a tripping control signal is issued;

[0051] a trip driving module, configured to send a trip driving signal accordin...

Embodiment 2

[0067] Embodiment two: combine below image 3 This embodiment will be described in detail. Compared with Embodiment 1, the difference of the non-contact passive SPD backup protection circuit breaker described in this embodiment is:

[0068] The current detection module of this embodiment judges that the overcurrent is a surge current or a surge protection failure current according to the duration of the rectified target detection current, and when the judgment result is a surge current, guides the target detection current into the power ground, When the judgment result is the surge protection failure current, a tripping control signal is issued.

[0069] The current detection module of this embodiment includes a Zener diode D1, a delay resistor R1 and a delay capacitor C1;

[0070] The two AC input terminals of the rectifier bridge are respectively connected to the two external terminals of the secondary winding of the current mutual induction module, and the anode of the re...

Embodiment 3

[0078] Embodiment three: the following combination Figure 4 This embodiment will be described in detail. Compared with Embodiment 1, the difference of the non-contact passive SPD backup protection circuit breaker described in this embodiment is:

[0079] The current detection module of this embodiment judges that the overcurrent is a surge current or a surge protection failure current according to the magnitude and duration of the rectified target detection current, and when the judgment result is a surge current, guides the target detection current into the power supply When the judgment result is the surge protection failure current, a tripping control signal is issued.

[0080] The current detection module of this embodiment includes a Zener diode D1, a sampling resistor R1, a thyristor Q, a delay resistor R2 and a delay capacitor C1;

[0081] The two AC input terminals of the rectifier bridge are respectively connected to the two external terminals of the secondary wind...

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PUM

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Abstract

A non-contact passive SPD backup protection circuit breaker belongs to the technical field of backup protection. The SPD backup protection circuit breaker converts the overcurrent on the power frequency phase line connected to the surge protector into a target detection current through a current mutual induction module; rectifies the target detection current through a rectification module; judges through a current detection module Corresponding to the overcurrent type of the rectified target detection current, when the overcurrent is a normal surge current, the rectified target detection current is discharged to the ground, and when the overcurrent is the SPD failure current, it is driven by tripping The cooperation of the module and the electromagnetic trip module cuts off the power frequency phase line. Since the current detection module in the present invention is a passive module, the non-contact passive SPD backup protective circuit breaker of the present invention avoids the problem of non-action or malfunction of the active SPD backup protective circuit breaker.

Description

technical field [0001] The invention relates to a backup protection circuit breaker, which belongs to the technical field of backup protection. Background technique [0002] Surge protector (SPD) is mainly used to limit transient overvoltage and discharge surge current. Transient overvoltage generally includes atmospheric overvoltage and operating overvoltage. When lightning falls on buildings or near buildings and transmission lines or near transmission lines, it will invade or induce transient overvoltages of tens of kilovolts, and invade power distribution circuits along the lines to damage electrical and electronic equipment. In order to protect the electrical system and important electrical and electronic equipment from lightning overvoltage damage, the power distribution system and communication signal system must be installed with surge protectors. [0003] According to the working principle of SPD and the characteristics of components, the internal lightning protec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/04
CPCH02H9/04
Inventor 黄献国吴钟栅
Owner YUEQING BEIJIAER ELECTRONICS TECH CO LTD
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