Ground-wire-missing alarming protective circuit for voltage stabilizer

A technology for protecting circuits and voltage regulators, applied in the field of circuits, can solve problems such as loss of personnel and property, failure to ensure effective grounding wires, and accidents

Inactive Publication Date: 2012-08-01
三科电器集团有限公司
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the voltage stabilizer is used without a ground wire or the ground wire is open, if there is a phase voltage leakage, accidents are prone to occur. Once the ground wire fails, the power supply cannot be cut off in time, which will cause personal and property

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
  • Ground-wire-missing alarming protective circuit for voltage stabilizer
  • Ground-wire-missing alarming protective circuit for voltage stabilizer
  • Ground-wire-missing alarming protective circuit for voltage stabilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] Such as Figure 1-Figure 3 As shown in the figure, a voltage stabilizer lacks ground alarm protection circuit. The ground wire is connected to the input terminal of the ground wire of the whole machine with a wire. The ground sampling signal is formed between the ground wire terminal and the input phase voltage, and the sampling voltage signal passes through the resistor R1. , Resistor R2 are respectively input to the reverse end and the same direction end of the operational amplifier U1, the output signal of the operational amplifier U1 is rectified by the rectifier diode D1, filtered by the filter capacitor C1, and then input to the same direction end of the comparator U2, at the same time, the motherboard power supply is passed through the resistor After R6 and resistor R7 divide the voltage, a reference signal is obtained, which is directly input to the reverse terminal of the comparator U2. After the sampling signal and the reference signal are compared by the compa...

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 ground-wire-missing alarming protective circuit for a voltage stabilizer. A ground wire is connected to a ground wire input terminal of a complete machine through a conducting wire, a grounding sampling signal is formed between the grounding terminal and an inputted phase voltage, a sampled voltage signal is respectively inputted to a reverse end and the end in the same direction of an operational amplifier U1 through a resistance R1 and a resistance R2, a signal outputted by the operational amplifier U1 is inputted to the end in the same direction of a comparator U2 after being rectified by a rectification diode D1 and being filtered by a filter capacitance C1, simultaneously a benchmark signal is acquired after a main-board power supply is divided by a resistance R6 and a resistance R7, the benchmark signal is directly inputted to a reverse end of the comparator U2, the sampling signal is compared with the benchmark signal by the comparator U2 to acquire an output signal which is connected with a base electrode of a triode Q1 through a limiting resistance R8, and an output relay K1 is driven by controlling the triode Q1. Finally the output relay K1 is used for controlling the work state of an output alternative-current contactor and controlling an acoustic-optic alarming circuit to work so as to realize the ground wire missing alarming.

Description

technical field [0001] The invention relates to a circuit, in particular to a circuit capable of realizing alarm protection when a voltage stabilizer lacks ground. Background technique [0002] When the voltage stabilizer is used without a grounding wire or the grounding wire is open, if there is a phase voltage leakage, accidents are prone to occur. Once the grounding wire fails, the power supply cannot be cut off in time, which will cause personal and property losses. The existing voltage stabilizer is not equipped with a ground loss protection circuit, so it cannot guarantee that the ground wire is effective. Therefore, voltage stabilizers currently on the market cannot meet people's needs in terms of safety and reliability. Contents of the invention [0003] The purpose of the present invention is to provide a simple, convenient, safe and reliable voltage stabilizer ground shortage alarm protection circuit for the shortcomings of the existing voltage stabilizer techno...

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
IPC IPC(8): H02H3/00H02H3/04
Inventor 周熙文
Owner 三科电器集团有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap