Approximate procedure for technical diagnostics of electrical installations of consumers

Free technical library

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Encyclopedia of radio electronics and electrical engineering / Electrician

Appendix 2. Approximate procedure for technical diagnostics of electrical installations of consumers. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Rules for the technical operation of consumer electrical installations (PTE)

Comments on the article

Based on this exemplary methodology for conducting technical diagnostics of electrical installations, Consumers draw up a separate document for the main types of electrical installations (OST, STP, regulations, etc.), including:

1. Tasks of technical diagnostics:

type="disc">

determination of the type of technical condition;

search for a place of failure or malfunctions;

technical condition forecasting.

2. Terms of technical diagnostics:

type="disc">

establish indicators and characteristics of diagnosis;

ensure that the electrical installation is suitable for technical diagnostics;

develop and implement diagnostic support.

3. Indicators and characteristics of technical diagnostics.

3.1. The following diagnostic parameters are set:

type="disc">

indicators of accuracy and reliability of diagnosis;

technical and economic indicators.

Indicators of accuracy and reliability of diagnosis are given in Table A2.1.

Technical and economic indicators include:

combined material and labor costs;

duration of diagnosis;

frequency of diagnosis.

3.2. The following diagnostic characteristics are set:

type="disc">

nomenclature of parameters of the electrical installation, allowing to determine its technical condition (when determining the type of technical condition of the electrical installation);

the depth of the search for the place of failure or malfunction, determined by the level of design complexity of the components or the list of elements, with the accuracy to which the place of failure or malfunction must be determined (when searching for the place of failure or malfunction);

nomenclature of product parameters that allow predicting its technical condition (when predicting the technical condition).

4. Characteristics of the nomenclature of diagnostic parameters.

4.1. The nomenclature of diagnostic parameters must meet the requirements of completeness, informativeness and availability of measurements at the lowest time and cost of implementation.

4.2. Diagnostic parameters can be characterized by giving data on nominal and permissible values, control points, etc.

5. Method of technical diagnostics.

5.1. Diagnostic model of electrical installation.

The electrical installation subjected to diagnostics is specified in the form of a tabular diagnostic map (in vector, graphic or other form).

5.2. Rules for determining structural (defining) parameters.

This parameter directly and essentially characterizes the property of the electrical installation or its assembly. There may be several structural parameters. Priority is given to that (those) parameter that (which) satisfies the requirements for determining the true technical condition of a given electrical installation (assembly) for the given operating conditions.

5.3. Rules for measuring diagnostic parameters.

This subclause includes the basic requirements for the measurement of diagnostic parameters and the related specific requirements available.

5.4. Diagnostic algorithm and software.

5.4.1. Diagnosis algorithm.

The description of the list of elementary checks of the object of diagnosis is given. An elementary check is determined by the working or test action that enters or is applied to the object, as well as the composition of the features (parameters) that form the object's response to the corresponding action. Specific values of signs (parameters) obtained during diagnosis are the results of elementary checks or the values of the object's response.

5.4.2. The need for software, the development of both specific diagnostic software products and other software products to ensure the functioning of the technical diagnostic system as a whole is determined by the Consumer.

5.5. Rules for analysis and decision-making on diagnostic information.

5.5.1. Composition of diagnostic information.

a) passport data of the electrical installation;

b) data on the technical condition of the electrical installation at the initial moment of operation;

c) data on the current technical condition with the results of measurements and surveys;

d) data with the results of calculations, estimates, preliminary forecasts and conclusions;

e) generalized data on the electrical installation.

Diagnostic information is entered into the industry database (if any) and into the Consumer's database in the appropriate format and information storage structure. Methodological and practical guidance is provided by a higher organization and a specialized organization.

5.5.2. The user manual describes the sequence and procedure for analyzing the obtained diagnostic information, comparing and contrasting the parameters and signs obtained after measurements and tests; recommendations and approaches when making a decision on the use of diagnostic information.

6. Means of technical diagnostics.

6.1. Technical diagnostic tools must ensure the determination (measurement) or control of diagnostic parameters in the operating modes of the electrical installation, established in the operational documentation or adopted at this enterprise in specific operating conditions.

6.2. The means and equipment used to control diagnostic parameters should allow reliable determination of the measured parameters. Supervision over the means of technical diagnostics should be carried out by the metrological services of the corresponding levels of functioning of the technical diagnostics system and carried out in accordance with the regulation on the metrological service.

The list of tools, instruments and apparatus required for technical diagnostics is established in accordance with the type of electrical installation being diagnosed.

7. Rules for technical diagnostics.

7.1. The sequence of diagnostic operations.

The sequence of performing the relevant measurements, expert assessments for the entire range of diagnostic parameters and characteristics established for a given electrical installation and presented in the diagnostic map is described. The content of the diagnostic card is determined by the type of electrical installation.

7.2. Technical requirements for performing diagnostic operations.

When performing diagnostic operations, it is necessary to comply with all the requirements and instructions of the PUE, these Rules, the Intersectoral Labor Protection Rules (safety rules) for the operation of electrical installations, other industry documents, as well as GOSTs for diagnostics and reliability. Specific references should be made in working papers.

7.3. Instructions on the mode of operation of the electrical installation when diagnosing.

The operating mode of the electrical installation is indicated in the process of diagnosing. The diagnostic process can take place during the operation of the electrical installation, and then it is functional technical diagnostics. Diagnostics in stop mode is possible. It is possible to diagnose in the forced mode of operation of the electrical installation.

7.4. Requirements for the safety of diagnostic processes and other requirements in accordance with the specifics of the operation of the electrical installation.

The general and those basic safety requirements for diagnosing that relate to a particular electrical installation are indicated; however, sections and paragraphs of the relevant rules and guidance materials should be specifically listed.

Mention is made of the need for the organization performing the diagnostic work to have the appropriate permits.

Before starting work on diagnosing, workers participating in it must obtain a work permit for the performance of work.

This section should formulate safety requirements for functional diagnostics and diagnostics during forced operation of the electrical installation. The specific requirements available for this Consumer for the specific operating conditions of this electrical installation must also be indicated.

8. Processing the results of technical diagnostics.

8.1. Instructions for registering diagnostic results.

The procedure for registering the results of diagnostics, measurements and tests is indicated, forms of protocols and acts are given.

8.2. Instructions and recommendations for issuing a conclusion.

Instructions and recommendations are given for processing the results of examinations, measurements and tests, analyzing and comparing the results obtained with the previous ones and issuing a conclusion, diagnosis. Recommendations are given for carrying out repair and restoration work.

Indicators of reliability and accuracy of diagnostics of electrical installations

The task of diagnosing Diagnosis result Reliability and accuracy indicators
1 2 3
Definition of the type of technical condition Conclusion in the form: The probability that, as a result of diagnosing, the electrical installation is recognized as serviceable (operable), provided that it is faulty (inoperable)
1. The electrical installation is serviceable and (or) operable
2. The electrical installation is faulty and (or) inoperative The probability that, as a result of diagnosing, the electrical installation is recognized as faulty (inoperable), provided that it is serviceable (operable)
Finding the location of failure or malfunctions The name of the element (assembly unit) or group of elements that have a faulty state and the place of failure or faults The probability that, as a result of diagnosing, a decision is made that there is no failure (malfunction) in this element (group), provided that this failure occurs
The probability that, as a result of diagnosing, a decision is made about the presence of a failure in a given element (group), provided that this failure is absent
Forecasting the technical condition The numerical value of the parameters of the technical condition for a given period of time, including at a given point in time Standard deviation of predicted parameter
The numerical value of the residual resource (times) Standard deviation of predicted residual life
The lower bound on the probability of failure-free operation in terms of safety parameters for a given period of time Confidence probability

* Determining the numerical values of the diagnostic indicators should be considered necessary for especially important objects established by a higher organization, a specialized organization and the Consumer's management; in other cases, an expert assessment is applied by the Consumer's person responsible for the electrical equipment.

See other articles Section Rules for the technical operation of consumer electrical installations (PTE).

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

The world's tallest astronomical observatory opened 04.05.2024

Exploring space and its mysteries is a task that attracts the attention of astronomers from all over the world. In the fresh air of the high mountains, far from city light pollution, the stars and planets reveal their secrets with greater clarity. A new page is opening in the history of astronomy with the opening of the world's highest astronomical observatory - the Atacama Observatory of the University of Tokyo. The Atacama Observatory, located at an altitude of 5640 meters above sea level, opens up new opportunities for astronomers in the study of space. This site has become the highest location for a ground-based telescope, providing researchers with a unique tool for studying infrared waves in the Universe. Although the high altitude location provides clearer skies and less interference from the atmosphere, building an observatory on a high mountain poses enormous difficulties and challenges. However, despite the difficulties, the new observatory opens up broad research prospects for astronomers. ... >>

Controlling objects using air currents 04.05.2024

The development of robotics continues to open up new prospects for us in the field of automation and control of various objects. Recently, Finnish scientists presented an innovative approach to controlling humanoid robots using air currents. This method promises to revolutionize the way objects are manipulated and open new horizons in the field of robotics. The idea of controlling objects using air currents is not new, but until recently, implementing such concepts remained a challenge. Finnish researchers have developed an innovative method that allows robots to manipulate objects using special air jets as "air fingers". The air flow control algorithm, developed by a team of specialists, is based on a thorough study of the movement of objects in the air flow. The air jet control system, carried out using special motors, allows you to direct objects without resorting to physical ... >>

Purebred dogs get sick no more often than purebred dogs 03.05.2024

Caring for the health of our pets is an important aspect of the life of every dog owner. However, there is a common assumption that purebred dogs are more susceptible to diseases compared to mixed dogs. New research led by researchers at the Texas School of Veterinary Medicine and Biomedical Sciences brings new perspective to this question. A study conducted by the Dog Aging Project (DAP) of more than 27 companion dogs found that purebred and mixed dogs were generally equally likely to experience various diseases. Although some breeds may be more susceptible to certain diseases, the overall diagnosis rate is virtually the same between both groups. The Dog Aging Project's chief veterinarian, Dr. Keith Creevy, notes that there are several well-known diseases that are more common in certain breeds of dogs, which supports the notion that purebred dogs are more susceptible to disease. ... >>

Random news from the Archive

Power supply modules type SPM 21.03.2005

FAIRCHILD SEMICONDUCTOR announced the production of SPM power modules that provide efficient motor control for applications such as washing machines and air conditioners.

The modules are designed for powers from 300 W to 13 kW and output currents from 3 to 30 A. Case dimensions are reduced to 44x26,8 mm. There is protection when the supply voltage is out of range, as well as protection against short circuits.

Other interesting news:

▪ Geospatial Intelligence

▪ Robot for the evacuation of the wounded

▪ Recorded the most powerful burst of energy in space in the time of observation

▪ 2016 will be a second longer

▪ MiniCa miniature camera

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ site section And then an inventor (TRIZ) appeared. Article selection

▪ article There are no free breakfasts. Popular expression

▪ article What physical law helped to convict speculators of illegal insider trading? Detailed answer

▪ article Workshop in a city apartment. home workshop

▪ article Preparatory work before the installation of electrical wiring. Punch work. Encyclopedia of radio electronics and electrical engineering

▪ article Protection of microwave transistors. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews