CN207301222U - A kind of electrical equipment protective grounding state monitoring apparatus - Google Patents
A kind of electrical equipment protective grounding state monitoring apparatus Download PDFInfo
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- CN207301222U CN207301222U CN201721172642.5U CN201721172642U CN207301222U CN 207301222 U CN207301222 U CN 207301222U CN 201721172642 U CN201721172642 U CN 201721172642U CN 207301222 U CN207301222 U CN 207301222U
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Abstract
The utility model discloses a kind of electrical equipment protective grounding state monitoring apparatus, it is related to the technical field of safety protection of electrical equipment in electric system.The electrical equipment protective grounding state device; including cabinet, the switch or button that are arranged on the cabinet; and power module, ground state monitoring and controlling unit and alarm unit in the cabinet are arranged on, the ground state monitoring and controlling unit includes sequentially connected sample resistance, photoelectric isolating circuit and microcomputer monitoring unit；Drawn from the tie point at sample resistance Yu photoelectric isolating circuit input grounding end and be used as PE ground protection monitoring outputs；In electrical equipment protective grounding status monitoring; by the ground terminal of electrical equipment and PE ground protection monitoring output common ground connections; by the state of the real-time continuous monitoring PE ground protection monitoring outputs of microcomputer monitoring unit, the monitoring real-time continuous to the ground state of electrical equipment is realized.
Description
Technical field
The utility model belongs to the safety protection technique of electrical equipment in electric system, more particularly to a kind of electrical equipment is protected
Protect earthing condition monitor.
Background technology
During electrical equipment use, the metal shell of equipment needs to set dedicated protective grounding line.Particular for
Electrical equipment used in power supply bureau's substation field, since the test environment at scene is complicated, interference is big while has very strong
Induced electricity, if electrical equipment ground wire loose contact, broken string or not wired situation, protection occurs and connects in use
Ground is just lost to the due protective effect of personal safety.
At present, the protective grounding wire state of electrical equipment still lacks the monitoring means of continuous effective.Electrically set not changing
In the case of standby original structure and functional status, the present invention propose a kind of electrical equipment protective grounding state continuous monitoring method and
Monitoring device, by the connection with electrical equipment grounding line, realizes the real-time monitoring to electrical equipment protective grounding wire state, right
The safety in production of power department and the personal safety of field test personnel have very important significance.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of electrical equipment protective grounding state monitoring apparatus.
The utility model is to solve above-mentioned technical problem by the following technical solutions：A kind of electrical equipment protection connects
Ground state monitoring apparatus, including cabinet, the switch or button that are arranged on the cabinet, and the electricity being arranged in the cabinet
Source module, ground state monitoring and controlling unit and alarm unit；
The power module includes AC/DC power modules, and sequentially connected rectification module, pwm pulse voltage reduction module
With voltage stabilizing output module；The ground state monitoring and controlling unit include sequentially connected sample resistance, photoelectric isolating circuit with
And microcomputer monitoring unit；The output terminal of the AC/DC power modules is connected with the microcomputer monitoring unit；The voltage stabilizing is defeated
One end of the output terminal and sample resistance that go out module connects, and the input of the other end and photoelectric coupling circuit of the sample resistance connects
Ground terminal connects, and draws as PE ground protection monitoring outputs；The microcomputer monitoring unit is connected with alarm unit.
Further, the switch or button include power switch, feeler switch and ventil；The one of the power switch
The input terminal respectively with AC/DC power modules and rectification module is held to be connected；The other end is connected with external ac power source, for controlling
The working power of device；The feeler switch and ventil are connected with microcomputer monitoring unit respectively, be respectively used to start monitoring and
Cancel alarm when sending sound-light alarm.
Further, the AC/DC power modules include transistor, sampling module, reference voltage module, comparison module with
And light emitting diode；The sampling module includes the sampling resistor and thermo-sensitive resistor being connected in series with each other；The reference voltage mould
Block includes two the resistance R1 and R2 being connected in series；The comparison module includes comparator and NPN triode, the comparator
The base stage of output terminal and NPN triode connects, and the collector of NPN triode is connected with power supply, the emitter and hair of NPN triode
Optical diode connects；The thermo-sensitive resistor is fitted on the transistor；The common connection of the sampling resistor and thermo-sensitive resistor
Point is connected with the noninverting input of the comparator；The common connecting point of the resistance R1 and resistance R2 are anti-with the comparator
Connected to input terminal；When the temperature of transistor is excessive, light emitting diode sends light warning, to remind operating personnel to take
Measure, prevents transistor from burning out.
Further, the photoelectric coupling circuit uses TLP632 photoelectric coupling chips.
Further, the microcomputer monitoring unit uses the singlechip chip of model STM32L151, passes through
Two input I/O interfaces of P0.1 and P0.2 of STM32L151 chips carry out double logics to the isolation input signal at sample resistance both ends
Combination judges, to judge whether ground state is normal.
Compared with prior art, electrical equipment protective grounding state device provided by the utility model, including cabinet, set
Switch or button on the cabinet are put, and power module, the ground state monitoring and controlling list being arranged in the cabinet
Member and alarm unit, the ground state monitoring and controlling unit include sequentially connected sample resistance, photoelectric isolating circuit with
And microcomputer monitoring unit；Drawn from the tie point at sample resistance Yu photoelectric isolating circuit input grounding end and be used as PE ground protections
Monitoring output；It is in electrical equipment protective grounding status monitoring, the ground terminal of electrical equipment and the monitoring of PE ground protections is defeated
Outlet common ground connection, by the state of the real-time continuous monitoring PE ground protection monitoring outputs of microcomputer monitoring unit, works as PE
When there is loose contact, broken string or non-wiring with ground wire in ground protection monitoring output, the height of PE ground protection monitoring outputs
Level is monitored that control alarm unit sends sound-light alarm, realizes the ground state to electrical equipment by microcomputer monitoring unit
Real-time continuous monitoring, the personal safety for the testing crew that keeps the scene intact；The present invention monitoring device have it is simple in structure, reliable,
The safe to use and monitoring advantage such as convenient.
Brief description of the drawings
, below will be to needed in embodiment description in order to illustrate more clearly of the technical solution of the utility model
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only one embodiment of the utility model, for
For those of ordinary skill in the art, without creative efforts, other can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of structure diagram of electrical equipment protective grounding state device of the utility model；
Fig. 2 is the wiring diagram of the utility model electrical equipment and electrical equipment protective grounding state monitoring apparatus；
Wherein：1- PE ground protection monitoring outputs, 2- ground terminals, 3- sample resistances.
Embodiment
With reference to the attached drawing in the utility model embodiment, technical solution of this implementation in new is carried out clear, complete
Site preparation describes, it is clear that the described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.
Based on the embodiment in the utility model, those of ordinary skill in the art are obtained on the premise of creative work is not made
Every other embodiment, shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of electrical equipment protective grounding state monitoring apparatus provided by the utility model, including machine
Case, the switch or button being arranged on cabinet, and be arranged in cabinet power module, ground state monitoring and controlling unit with
And alarm unit；
Power module includes AC/DC power modules, and sequentially connected rectification module, pwm pulse voltage reduction module and steady
Press output module；Ground state monitoring and controlling unit includes sequentially connected sample resistance 3, photoelectric isolating circuit and microcontroller
Monitoring unit；The output terminal of AC/DC power modules is connected with microcomputer monitoring unit；The output terminal of voltage stabilizing output module and sampling
One end connection of resistance 3, the other end of sample resistance 3 and the input grounding end of photoelectric coupling circuit connect, and draw as PE
Ground protection monitoring output 1；Microcomputer monitoring unit is connected with alarm unit.
Switch or button include power switch, feeler switch and ventil；One end of power switch respectively with AC/DC power supplys
Module is connected with the input terminal of rectification module；The other end is connected with external ac power source, the working power for control device；Survey
Examination key and ventil are connected with microcomputer monitoring unit respectively, are respectively used to start monitoring and are cancelled report when sending sound-light alarm
Alert sound.
AC/DC power modules include transistor, sampling module, reference voltage module, comparison module and light emitting diode；
Sampling module includes the sampling resistor and thermo-sensitive resistor being connected in series with each other；Reference voltage module includes two electricity being connected in series
Hinder R1 and R2；Comparison module includes comparator and NPN triode, and the output terminal of comparator and the base stage of NPN triode connect,
The collector of NPN triode is connected with power supply, and the emitter of NPN triode is connected with light emitting diode；Thermo-sensitive resistor is fitted in
On transistor；The noninverting input connection of the common connecting point and comparator of sampling resistor and thermo-sensitive resistor；Resistance R1 and resistance
The common connecting point of R2 and the reverse input end of comparator connect；When the temperature of transistor is excessive, light emitting diode sends lamp
Light is alarmed, and to remind operating personnel to take measures, prevents transistor from burning out.
Photoelectric coupling circuit uses TLP632 photoelectric coupling chips.
As shown in Fig. 2, in electrical equipment protective grounding status monitoring, the ground terminal 2 of electrical equipment and PE ground connection are protected
1 common ground connection of monitoring output is protected, passes through the real-time continuous monitoring PE ground protections monitoring output 1 of microcomputer monitoring unit
State；Microcomputer monitoring unit uses the singlechip chip of model STM32L151, by the P0.1 of STM32L151 chips and
Two input I/O interfaces of P0.2 carry out double logical combinations to the isolation input signal at sample resistance both ends and judge, to judge to be grounded shape
Whether state is normal.In the present embodiment, the resistance value of sample resistance 3 is 40 ohm.When monitoring device enters monitoring state, P0.1 mouthfuls
For 1, to P0.2 mouthfuls（PE ground protections monitoring output 1）It is monitored；When PE ground protections monitoring output 1 and ground wire occur
When loose contact, broken string or non-wiring, PE ground protections monitoring output 1 is high level, and P0.2 mouthfuls are 1, and ground state is bad,
Monitoring device sends sound-light alarm.
Above disclosed is only specific embodiment of the present utility model, but the scope of protection of the utility model not office
It is limited to this, any one skilled in the art can readily occur in change in the technical scope that the utility model discloses
Change or modification, should be covered within the scope of the utility model.
Claims (5)
- A kind of 1. electrical equipment protective grounding state monitoring apparatus, it is characterised in that：Including cabinet, it is arranged on the cabinet Switch or button, and power module, ground state monitoring and controlling unit and the alarm unit being arranged in the cabinet；The power module includes AC/DC power modules, and sequentially connected rectification module, pwm pulse voltage reduction module and steady Press output module；The ground state monitoring and controlling unit includes sequentially connected sample resistance, photoelectric isolating circuit and list Piece machine monitoring unit；The output terminal of the AC/DC power modules is connected with the microcomputer monitoring unit；The voltage stabilizing exports mould The output terminal of block and one end of sample resistance connect, the other end of the sample resistance and the input grounding end of photoelectric coupling circuit Connection, and draw as PE ground protection monitoring outputs；The microcomputer monitoring unit is connected with alarm unit.
- 2. electrical equipment protective grounding state monitoring apparatus as claimed in claim 1, it is characterised in that：The switch or button Including power switch, feeler switch and ventil；One end of the power switch respectively with AC/DC power modules and rectification module Input terminal connection；The other end is connected with external ac power source, the working power for control device；The feeler switch and noise reduction Key is connected with microcomputer monitoring unit respectively, is respectively used to start to monitor and is cancelled alarm when sending sound-light alarm.
- 3. electrical equipment protective grounding state monitoring apparatus as claimed in claim 1, it is characterised in that：The AC/DC power supplys Module includes transistor, sampling module, reference voltage module, comparison module and light emitting diode；The sampling module includes The sampling resistor and thermo-sensitive resistor being connected in series with each other；The reference voltage module include two resistance R1 being connected in series and R2；The comparison module includes comparator and NPN triode, and the output terminal of the comparator and the base stage of NPN triode connect, The collector of NPN triode is connected with power supply, and the emitter of NPN triode is connected with light emitting diode；The thermo-sensitive resistor patch Close on the transistor；The common connecting point of the sampling resistor and thermo-sensitive resistor connects with the noninverting input of the comparator Connect；The common connecting point of the resistance R1 and resistance R2 are connected with the reverse input end of the comparator.
- 4. electrical equipment protective grounding state monitoring apparatus as claimed in claim 1, it is characterised in that：The photoelectric coupling electricity Road uses TLP632 photoelectric coupling chips.
- 5. electrical equipment protective grounding state monitoring apparatus as claimed in claim 1, it is characterised in that：The microcomputer monitoring Unit uses the singlechip chip of model STM32L151, is connect by two input IO of P0.1 and P0.2 of STM32L151 chips Mouth carries out double logical combinations to the isolation input signal at sample resistance both ends and judges, to judge whether ground state is normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721172642.5U CN207301222U (en) | 2017-09-13 | 2017-09-13 | A kind of electrical equipment protective grounding state monitoring apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721172642.5U CN207301222U (en) | 2017-09-13 | 2017-09-13 | A kind of electrical equipment protective grounding state monitoring apparatus |
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| Publication Number | Publication Date |
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| CN207301222U true CN207301222U (en) | 2018-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721172642.5U Active CN207301222U (en) | 2017-09-13 | 2017-09-13 | A kind of electrical equipment protective grounding state monitoring apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108663595A (en) * | 2018-05-29 | 2018-10-16 | 广西电网有限责任公司电力科学研究院 | A kind of real-time inspection and control method of electrical equipment grounding state |
| RU196100U1 (en) * | 2019-12-05 | 2020-02-18 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Тульский государственный университет" (ТулГУ) | DEVICE FOR CONTINUOUS MONITORING AND CONTROL OF OPERATION EQUIPMENT OF POWER ELECTRICAL SUBSTATION UNDER CONDITIONS OF OPERATION |
-
2017
- 2017-09-13 CN CN201721172642.5U patent/CN207301222U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108663595A (en) * | 2018-05-29 | 2018-10-16 | 广西电网有限责任公司电力科学研究院 | A kind of real-time inspection and control method of electrical equipment grounding state |
| RU196100U1 (en) * | 2019-12-05 | 2020-02-18 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Тульский государственный университет" (ТулГУ) | DEVICE FOR CONTINUOUS MONITORING AND CONTROL OF OPERATION EQUIPMENT OF POWER ELECTRICAL SUBSTATION UNDER CONDITIONS OF OPERATION |
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