CN113470472A - Monitoring circuit for low-voltage electrified fire-connecting practice training - Google Patents
Monitoring circuit for low-voltage electrified fire-connecting practice training Download PDFInfo
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- CN113470472A CN113470472A CN202110838511.0A CN202110838511A CN113470472A CN 113470472 A CN113470472 A CN 113470472A CN 202110838511 A CN202110838511 A CN 202110838511A CN 113470472 A CN113470472 A CN 113470472A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 28
- 238000012549 training Methods 0.000 title claims abstract description 23
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 48
- 239000010703 silicon Substances 0.000 claims abstract description 48
- 238000000034 method Methods 0.000 abstract description 15
- KYIKRXIYLAGAKQ-UHFFFAOYSA-N abcn Chemical compound C1CCCCC1(C#N)N=NC1(C#N)CCCCC1 KYIKRXIYLAGAKQ-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/183—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for circuits
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- Emergency Management (AREA)
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Abstract
The application discloses a monitoring circuit for low-voltage electrified fire-connecting practice training, which comprises large resistors respectively connected to 4 cables, wherein the other ends of the 4 large resistors are connected with a direct-current power supply; the one end of big resistance still connects voltage comparator, and the silicon controlled rectifier is connected to voltage comparator's output, and the alarm component is connected to the other end of silicon controlled rectifier for when inserting human resistance on the cable, the both ends of big resistance produce the voltage difference, and voltage comparator output signal control silicon controlled rectifier makes the alarm component send out the police dispatch newspaper. The method and the device can give an alarm in time to inform the operator when the operator performs wrong operation, so that the actual operation capability of the operator is cultured.
Description
Technical Field
The application relates to the technical field of power operation monitoring, in particular to a monitoring circuit for low-voltage live-line fire-connecting practice training.
Background
Live working refers to a special working mode for testing, maintaining and replacing parts of live equipment under the condition of live. The live working can reduce the power failure time and improve the power supply reliability. Live working has two-layer meaning, namely: the electrical equipment comprises electrical equipment of a transmission line, a distribution line and a transformer substation, and is in a state of electrification instead of power failure; secondly, the inspection, installation, debugging, reconstruction and measurement of the electrified electrical equipment are commonly called.
The safety and reliability of 0.4Kv electrified fire-receiving must be ensured by the safety protection articles and the operation proficiency of the fire-receiving personnel in the work. Therefore, the operation skill level of the personnel using the self-safety protection article in the 0.4Kv live fire-receiving work is of the same importance. All these tasks need professional personnel to complete, and the professional quality of the personnel is the central importance of the whole tasks. At present, the access line of a low-voltage user is completed by power supply personnel under the condition that the line is electrified. However, during the working process, the personal safety of the power supply personnel in the wiring process must be ensured.
At present, the aging of power supply personnel is gradually expanded, and new personnel cannot directly carry out on duty operation and must be trained correspondingly.
In the current common training method, a 0.4kV electrified line is generally not electrified, most of the used electrified training devices can only train the operation process and the wiring process, the operation result can not achieve the effect of electrified training all the time, and if the training line is directly electrified to train a trainer, the personal safety of personnel in the training process can not be ensured. Some real-life error operations, the trainee cannot confirm the error and danger of the operation because the power is not supplied during the training process.
Disclosure of Invention
The embodiment of the application provides a monitoring circuit for low-voltage electrified fire-connecting practice training, which can give an alarm in time to inform an operator when the operator performs wrong operation, so that the practice ability of the operator is cultured.
In view of this, the present application provides, in a first aspect, a monitoring circuit for low-voltage live-line practice training, the monitoring circuit including:
the large resistors are respectively connected to the 4 cables, and the other ends of the 4 large resistors are connected with a direct-current power supply;
one end of the large resistor is further connected with a voltage comparator, the output end of the voltage comparator is connected with the silicon controlled rectifier, the other end of the silicon controlled rectifier is connected with an alarm element, when the human body resistor is connected to the cable, voltage difference is generated at two ends of the large resistor, and the voltage comparator outputs signals to control the silicon controlled rectifier, so that the alarm element gives an alarm.
Optionally, a resistor is further connected between the output end of the voltage comparator and the controllable silicon.
Optionally, the output end of the voltage comparator is respectively connected with two first silicon controlled rectifiers and a second silicon controlled rectifier, the other end of the first silicon controlled rectifier is connected with the buzzer, and the other end of the second silicon controlled rectifier is connected with the LED alarm.
Optionally, the second controllable silicon and the LED alarm are further connected with a resistor.
Optionally, the dc power supply and the large resistor are adjusted so that a loop circuit in the monitoring circuit is less than 3mA when the human body resistor is connected.
Optionally, the voltage of the dc power supply is 36V.
Optionally, the large resistance is a resistance in the megaohm range.
According to the technical scheme, the embodiment of the application has the following advantages:
in the embodiment of the application, the monitoring circuit for the low-voltage electrified fire-connecting practice training is provided, and comprises large resistors which are respectively connected to 4 cables, wherein the other ends of the 4 large resistors are connected with a direct-current power supply; the one end of big resistance still connects voltage comparator, and the silicon controlled rectifier is connected to voltage comparator's output, and the alarm component is connected to the other end of silicon controlled rectifier for when inserting human resistance on the cable, the both ends of big resistance produce the voltage difference, and voltage comparator output signal control silicon controlled rectifier makes the alarm component send out the police dispatch newspaper.
The large resistors are respectively connected to the 4 cables, and the other ends of the 4 large resistors are connected with a direct-current power supply; the one end of big resistance still connects voltage comparator, and the silicon controlled rectifier is connected to voltage comparator's output, and alarm element is connected to the other end of silicon controlled rectifier for when taking place operation personnel operation error, when inserting human resistance on the cable this moment, the both ends of big resistance produce the voltage difference, and voltage comparator output signal control silicon controlled rectifier makes alarm element send out the police dispatch newspaper, in time informs the operation personnel, thereby cultivates operation personnel's real ability of performing exercises.
Drawings
Fig. 1 is a circuit diagram of an embodiment of a monitoring circuit for low-voltage live-wire practice training according to the present application.
Detailed Description
The large resistors are respectively connected to the 4 cables, and the other ends of the 4 large resistors are connected with a direct-current power supply; the one end of big resistance still connects voltage comparator, and the silicon controlled rectifier is connected to voltage comparator's output, and alarm element is connected to the other end of silicon controlled rectifier for when taking place operation personnel operation error, when inserting human resistance on the cable this moment, the both ends of big resistance produce the voltage difference, and voltage comparator output signal control silicon controlled rectifier makes alarm element send out the police dispatch newspaper, in time informs the operation personnel, thereby cultivates operation personnel's real ability of performing exercises.
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a circuit diagram of an embodiment of a monitoring circuit for low-voltage live-line practice training according to the present application, as shown in fig. 1, where fig. 1 includes:
the large resistors are respectively connected to the 4 cables, and the other ends of the 4 large resistors are connected with a direct-current power supply; the one end of big resistance still connects voltage comparator, and the silicon controlled rectifier is connected to voltage comparator's output, and the alarm component is connected to the other end of silicon controlled rectifier for when inserting human resistance on the cable, the both ends of big resistance produce the voltage difference, and voltage comparator output signal control silicon controlled rectifier makes the alarm component send out the police dispatch newspaper.
It should be noted that, in order to perform low-voltage live-line practice training on an operator, the present application provides a corresponding monitoring circuit, and in fig. 1, ABCN in the monitoring circuit represents four cables for low-voltage live-line. The whole monitoring circuit uses direct current with safe voltage as a power supply, and the voltage of the power supply is 36V and the like. Four large resistors R1-R4 are connected in parallel to four cables ABCN in the monitoring circuit, in a specific embodiment, the large resistors R1-R4 are all resistors at the megaohm level, and the other ends of the large resistors R1-R4 are connected with a direct-current power supply.
The other ends of the large resistors R1 to R4 are respectively connected to a voltage comparator 1-a voltage comparator 4 for comparing voltages at both ends of the resistors R1 to R4. The output end of the voltage comparator is connected with the controlled silicon, and the other end of the controlled silicon is connected with the alarm element and used for controlling the alarm element.
When no work is performed, no current passes through R1, R2, R3, R4 and each cable, so that the voltage difference between both ends of R1(R2\ R3\ R4) is 0, that is, both ends are equal to the power supply voltage of the direct current power supply, and thus both ends of the voltage comparator are equal to the positive electrode potential of the direct current power supply. At the moment, the output of the voltage comparator is 0, all the controlled silicon are not conducted, the light is not bright, and the buzzer does not sound.
When an operator mistakenly contacts four ABCN cables, the operator is equivalent to a human body resistor connected into a cable line, namely R5-R8 are human body resistors, generally in the kilohm level and far smaller than large resistors R1-R4, voltage difference is generated at two ends of the resistors R1-R4 at the moment, current flows through R1-R4, the voltage comparator outputs positive voltage at the moment, and the output signal of the voltage comparator triggers the conduction of a silicon controlled rectifier, so that the alarm element can give an alarm to prompt the operator.
In addition, because the thyristor is current-controlled off, the alarm will continue at this point when the voltage comparator output is 0 (i.e., the person leaves the cable touched). The reset switch is required to be pressed, the circuit is restarted, the alarm is cancelled, and the circuit starts to work again.
In a specific embodiment, when a person contacts the two-phase cable at the same time, the outputs of the two groups of voltage comparators are triggered to be positive voltages, and then two buzzers are used for alarming.
The large resistors are respectively connected to the 4 cables, and the other ends of the 4 large resistors are connected with a direct-current power supply; the one end of big resistance still connects voltage comparator, and the silicon controlled rectifier is connected to voltage comparator's output, and alarm element is connected to the other end of silicon controlled rectifier for when taking place operation personnel operation error, when inserting human resistance on the cable this moment, the both ends of big resistance produce the voltage difference, and voltage comparator output signal control silicon controlled rectifier makes alarm element send out the police dispatch newspaper, in time informs the operation personnel, thereby cultivates operation personnel's real ability of performing exercises.
In a specific embodiment, a resistor is further connected between the output end of the voltage comparator and the thyristor.
In a specific implementation mode, the output end of the voltage comparator is respectively connected with two first silicon controlled rectifiers and two second silicon controlled rectifiers, the other end of each first silicon controlled rectifier is connected with the buzzer, and the other end of each second silicon controlled rectifier is connected with the LED alarm.
It should be noted that, a plurality of silicon controlled rectifiers can be connected to the voltage comparator in this application for control a plurality of alarm element, for example, two first silicon controlled rectifiers and second silicon controlled rectifier are connected respectively to the output of voltage comparator in this application, and bee calling organ is connected to the other end of first silicon controlled rectifier, and the LED alarm is connected to the other end of second silicon controlled rectifier, makes voltage comparator output signal control silicon controlled rectifier, thereby controls bee calling organ to report to the police, controls LED scintillation.
In a specific embodiment, the dc power supply and the large resistor may be controlled such that the loop circuit in the monitoring circuit is less than 3mA when the human body resistor is connected.
It should be noted that, the application can control the direct current power supply and the large resistor, so that when the human body resistor is connected, a loop circuit in the monitoring circuit is less than 3 mA. Specifically, the direct-current power supply and the large resistor can be set to two gears, so that when the first gear is the first gear, a loop circuit in the monitoring circuit is less than or equal to 1mA, the circuit only alarms, and no current is sensed by an operator; and in the second gear, a loop circuit in the monitoring circuit is larger than 1mA and smaller than 3mA, and at the moment, the circuit gives an alarm, and an operator senses the current. The operator can clearly recognize the operation error, and the practical operation ability of the operator is cultivated.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The terms "first," "second," "third," "fourth," and the like in the description of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (7)
1. The monitoring circuit for the low-voltage electrified fire-connecting practice training is characterized by comprising large resistors which are respectively connected with 4 cables, wherein the other ends of the 4 large resistors are connected with a direct-current power supply;
one end of the large resistor is further connected with a voltage comparator, the output end of the voltage comparator is connected with the silicon controlled rectifier, the other end of the silicon controlled rectifier is connected with an alarm element, when the human body resistor is connected to the cable, voltage difference is generated at two ends of the large resistor, and the voltage comparator outputs signals to control the silicon controlled rectifier, so that the alarm element gives an alarm.
2. The monitoring circuit for the low-voltage live fire practice training as claimed in claim 1, wherein a resistor is further connected between the output end of the voltage comparator and the thyristor.
3. The monitoring circuit for the low-voltage electrified fire-connecting practice training as claimed in claim 1, wherein the output end of the voltage comparator is respectively connected with two first silicon controlled rectifiers and two second silicon controlled rectifiers, the other end of the first silicon controlled rectifier is connected with a buzzer, and the other end of the second silicon controlled rectifier is connected with an LED alarm.
4. The monitoring circuit for the low-voltage live fire-connecting practice training as claimed in claim 3, wherein a resistor is further connected between the second thyristor and the LED alarm.
5. The monitoring circuit for low-voltage live fire practice training as claimed in claim 1, wherein the direct current power supply and the large resistor are adjusted so that when the human body resistor is connected, a loop circuit in the monitoring circuit is less than 3 mA.
6. The monitoring circuit for low-voltage live-fire practice training as claimed in claim 1, wherein the voltage of the dc power supply is 36V.
7. The monitoring circuit for low-voltage live-fire practice training as claimed in claim 1, wherein the large resistance is a resistance in the megaohm range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110838511.0A CN113470472A (en) | 2021-07-23 | 2021-07-23 | Monitoring circuit for low-voltage electrified fire-connecting practice training |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110838511.0A CN113470472A (en) | 2021-07-23 | 2021-07-23 | Monitoring circuit for low-voltage electrified fire-connecting practice training |
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| CN113470472A true CN113470472A (en) | 2021-10-01 |
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| CN202110838511.0A Pending CN113470472A (en) | 2021-07-23 | 2021-07-23 | Monitoring circuit for low-voltage electrified fire-connecting practice training |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0857363A (en) * | 1994-08-26 | 1996-03-05 | Asahi Sanac Kk | Power cable discontinuity detecting device for electrostatic spray gun with built-in high voltage generator |
| US20070195470A1 (en) * | 2006-02-21 | 2007-08-23 | General Protecht Group, Inc. | Intelligent life testing methods and apparatus for leakage current protection |
| CN204630695U (en) * | 2015-04-24 | 2015-09-09 | 中国海洋石油总公司 | For the water leakage alarm sensor of normobaric diving harness |
| CN105205964A (en) * | 2015-10-27 | 2015-12-30 | 广西职业技术学院 | Burglar alarm device for balcony |
| CN110648513A (en) * | 2019-10-30 | 2020-01-03 | 广东电网有限责任公司 | Intelligent alarm device for low-voltage distribution line live-line fire-receiving training |
-
2021
- 2021-07-23 CN CN202110838511.0A patent/CN113470472A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0857363A (en) * | 1994-08-26 | 1996-03-05 | Asahi Sanac Kk | Power cable discontinuity detecting device for electrostatic spray gun with built-in high voltage generator |
| US20070195470A1 (en) * | 2006-02-21 | 2007-08-23 | General Protecht Group, Inc. | Intelligent life testing methods and apparatus for leakage current protection |
| CN204630695U (en) * | 2015-04-24 | 2015-09-09 | 中国海洋石油总公司 | For the water leakage alarm sensor of normobaric diving harness |
| CN105205964A (en) * | 2015-10-27 | 2015-12-30 | 广西职业技术学院 | Burglar alarm device for balcony |
| CN110648513A (en) * | 2019-10-30 | 2020-01-03 | 广东电网有限责任公司 | Intelligent alarm device for low-voltage distribution line live-line fire-receiving training |
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Application publication date: 20211001 |