Many of todays pdm programs miss the vital communication link that ties supervision, maintenance technicians, planners, and all levels of production together. All a series of reports detailing the bene condition of vital rotating machinery problems have been detected by the fits of such a machine monitoring sys in the plant is one such scheme. Oct 15, 2014 its time to stop guessing when your equipment is going to fail, and start knowing. The following list of condition monitoring techniques, grouped by several category types, shows the extent technology has moved monitoring ahead. An overview of stateoftheart partial discharge analysis techniques for condition monitoring abstract. A potential failure is an identifiable condition that indicates that a functional failure is either about to occur or is in the process of occurring. Condition assessment of high voltage insulation in power. To confirm the adequacy of condition monitoring under normal operational and loca conditions to confirm the condition based qualification methodology.
Implementation strategies and tools for condition based. However, many of these tools are expensive when used for low power motors. It is also utilized for monitoring the zno arrester. In this context, various online and offline condition monitoring and diagnostics, nondestructive inspection techniques and surveillance are used. Introduction power transformer condition monitoring is generally considered as one of the most important condition monitoring cm techniques in power systems. Insulation feature transmission line insulator condition. Vibration monitoring is one of the oldest condition monitoring techniques and is widely used to detect mechanical faults such as bearing failures or mechanical imbalance 22. Different methods of fault detection are used in electrical conversion system condition and operation monitoring today. A maintenance carried out when it is deemed necessary, based on periodic inspections, diagnostic tests or other means of condition monitoring. Condition monitoring also called predictive maintenance uses nonintrusive techniques to judge the status of equipment or its parts performance.
Condition based maintenance and monitoring software fiix. The common premise of pdm is that the data gathered by regular monitoring is technically analysed. Electrical condition monitoring reliabilitysolutions. Transmission line insulator condition monitoring is of increasing interest with the ageing of many transmission lines constructed since. Condition monitoring techniques for electrical equipmenta. Spider80x machine condition monitoring system crystal. The complete conditionbased maintenance cbm guide fiix.
Condition monitoring of electrical assets using digital irt. Condition monitoring using computational intelligence methods. What are condition monitoring and preventive maintenance. Rules for classification and construction i ship technology. The generator bearing can also be monitored by vibration analysis techniques, similar to those used with the gearbox. To confirm the adequacy of condition monitoring under normal operational and loca conditions to confirm the conditionbased qualification methodology to confirm acceleration factors for accelerated aging tests and. Condition monitoring an overview sciencedirect topics. The different failure mechanisms of electrical machines and several monitoring techniques are analysed. A conditionmonitoring task is a scheduled task used to detect the potential onset of a failure so that action can be taken to prevent such failure. Authors contributions author sam wrote the first draft of. Nuregcr7000, essential elements of an electric cable.
It is one in monitoring to monitor and analyse the downs on monitored equipment. Pdf 20 ieee 1st international conference on condition. Before the connection is hot enough to result in equipment failure or possible ire, the patterns are easily seen through an ir imaging camera, the condition identiied and corrected. Predictive maintenance is the complement of preventive maintenance. Patel department of electrical engineering, ganpat university, kherva384012, department of electrical engineering, ganpat university, kherva384012.
Condition management in process and manufacturing is one of the key strategies for ensuring plant productivity, reliability and integrity. Condition monitoring and diagnostic techniques for mv vacuum. Rules for survey after construction part 7 or the abs. Similar to the mechanical system, condition monitoring of the generator and power electronics is necessary for early detection of failures. The various methods listed may or may not currently be linked within an iot network, but most are suitable for automatic data collection and analysis. Condition monitoring techniques include thermal analysis, vibration analysis, corrosion and erosion. It is the parent document of a group of international standards which cover the field of condition monitoring and diagnostics. Mousavi1 1iran university of science and technology iust, tehran, iran.
Brochure condition monitoring solutions for motors and. The use of condition monitoring allows maintenance to be scheduled. Prediction and scheduling of maintenance by condition. The need for improved performance of the huge investment in industrial plant particularly electrical generating machinery in recent times necessitates the application of condition monitoring techniques in its maintenance. Preventative measures are well known and should be utilised at every instance. Condition monitoring of electrical machines is essential because it helps avoiding heavy production losses in industry. Asset condition assessment electrical condition monitoring skills.
Cbm introduces new maintenance techniques, which can be difficult to implement due to resistance within an organization. An overview of stateoftheart partial discharge analysis. Condition monitoring doesnt work for every asset, so knowing which ones dont support sensors or other monitoring tools and techniques can save you lots of time and money later. Overdoing maintenance can cause equipment to deteriorate faster. Such a holistic condition monitoring approach should combine a number of condition monitoring modules including online partial discharge. Techniques to detect potential failure are known as on condition maintenance tasks.
Irt techniques are very beneficial and reduce the cost for the process of condition monitoring. Increasing interest has been seen in condition monitoring cm techniques for electrical equipment, mainly including transformer, generator, and induction motor in power plants, because cm has the. The use of condition monitoring allows maintenance to be scheduled, or other actions to be taken to prevent. As against preventive maintenance which is timebased, condition monitoring is condition based. Assessment of electrical cable condition monitoring tests sponsored by u. Condition monitoring or, colloquially, cm is the process of monitoring a parameter of condition in machinery vibration, temperature etc. The first key ingredient is a condition that can be monitored. According to henry 1979 an ideal predictive or condition monitoring maintenance technique should have the following characteristics. Condition monitoring using computational intelligence methods promotes the various approaches gathered under the umbrella of computational intelligence to show how condition monitoring can be used to avoid equipment failures and lengthen its useful life, minimize downtime and reduce maintenance costs. Woodley principles and methods as a starting point for any discussion on condition monitoring it is useful to define what is meant by the term, and to describe how it relates to other techniques used in the operation.
Pdf all machines, no matter how well they are designed, calculated or produced have the tendency to fail at some point of their existence. The paper analyzes, in brief, various online condition monitoring techniques for rotating electrical machines. Vibration of a machine can be represented in time domain in terms of its phase and amplitude which. The irt camera detects the loose connection, overload condition, and many additional problems. Based on these evaluations, the essential elements of an effective cable condition monitoring program have been identified. Just doing condition monitoring will not improve reliability, as dean explains. Ageing, maintenance plans, condition monitoring techniques, power transformers. Condition monitoring solutions for motors and generators enabling the right maintenance at the right time brochure. Electrical stress is highest near the conductor so it is common for the insulator closest to the conductor to be in a degraded condition. Authors contributions author sam wrote the first draft of the paper and author smgm read and approved the final manuscript. For example, if an image indicated a difference between a pulley belt temperature and an ambient temperature, the belt may have worn, be the wrong size, or indicate a misalignment. Vibration signature analysis vibration is a cyclic or pulsating motion of a machine or machine component from its point of rest1.
Component selection for condition based maintenance, parameter selection for monitoring condition, evaluation of condition monitoring results are issues influencing the effectiveness of condition based. Home download center electrical engineering books and technical guides power substation guides condition monitoring and diagnostic techniques for mv vacuum switchgear ageing and failure rates the mv vacuum circuit breaker yearly failure rates published in the latest international standards are in the 0. Condition monitoring and diagnostics of machines general. It does not require any direct contact for inspection jun and xinyu, 2011, ibarahim and amani, 2011. Through the utilization of various nondestructive testing and measuring techniques, predictive maintenance determines equipment status before a breakdown occurs. Various techniques for condition monitoring of three phase. The compact spider80x is designed for machine condition monitoring. There are two approaches for temperature measurement. Service life of electrical cable and condition monitoring methods.
The need for improved performance of the huge investment in industrial plant particularly electrical generating machinery in recent times necessitates the application of condition monitoring techniques in. Each frontend features eight analog input channels and two channels that may be software selected as tachometer inputs for the analysis of rotating machinery. Condition monitoring of an electrical machine using irt is a technique that relies majorly on temperature measurement of the equipment under test. Condition monitoring techniques for electrical equipment.
Lee has more than 40 years experience in the public. It sets out general procedures to be considered when setting up a condition monitoring programme for all machines, and. Mar 26, 2015 training manager dean whittle explains the reason for condition monitoring filmed at maintec 2015. The timefrequency signal processing based methods have been extensively used with current, vibration, and acoustic emission signals to detect the diverse symptoms of motor failures. As already discussed in brief elsewhere in the paper, practice of online as well as offline condition monitoring has been adopted as a part of preventive maintenance and predictive maintenance in some of the critical electrical equipment. Page 1 condition monitoring tests and predictive maintenance can help pump operators determine when to overhaul pumps in a way that minimizes costs. Skf electric motor condition monitoring emcm overview. Fluke predictive maintenance is a conditiondriven preventive maintenance program. Condition monitoring and fault diagnosis of electrical motors.
Transformers are the most critical assets of electrical transmission and distribution system. Condition monitoring electrical plant and equipment. With predictive maintenance pdm, organizations are setting aside the ol. A summary is provided of the causes of failure damage, ageing, and electrical deterioration and reduced cable life with the developing tools to predict and analyse such failures as part of a continuous process of monitoring the condition of the asset. Keywordscondition monitoring, induction machines, nonlinear least squares, compressors abstractthis paper presents a park transformbased method for preprocessing stator current data from a motor and transforming it into a form that is useful for fault detection and diagnostics. Therefore, holistic strategies of condition monitoring are an important component. Cbm introduces new maintenance techniques, which can be difficult to implement due to. It is hoped that the tools presented in this article will help asset managers and engineers apply predictive maintenance approaches and condition monitoring to process pumps, as well as improve management of pump assets to provide capacity for.
Increasing interest has been seen in condition monitoring cm techniques for electrical equipment, mainly including transformer, generator, and induction motor in power plants, because cm has the potential to reduce operating costs, enhance the reliability of operation, and improve power supply and service to customers. As a starting point for any discussion on condition monitoring it is useful to define what is meant by the term, and to describe how it relates to other techniques used in the operation and maintenance of machines, such as alarm and shut down systems or methods for failure and problem investigation. This acceleration signal can be integrated to give the velocity or. A complete guide to condition based maintenance the ins and. Condition monitoring system an overview sciencedirect topics. Maintenance management of electrical equipment condition monitoring based part 2 photo credit.
Abstract induction motor drives are the most widely used electrical drive system and they typically consume 40 percent of an industrialized nations total generating capacity. Predictive maintenance by electrical signature analysis to induction motors 491 interesting and little explored field surfaces, which is the introduction of predictive maintenance techniques based on electrical signature analysis. This report summarizes several of the most effective and commonly used condition monitoring techniques available to detect damage and measure the extent of degradation in electric cable insulation. Nowadays, there are many monitoring techniques and tools that ensure a high reliability of a rotating electrical motor.
Nicholas lee poh choo peng, beng electrical, consultant, carlo solutions. Conditionbased maintenance predictive techniques emaint. This international standard provides guidance for condition monitoring and diagnostics of machines. Recently, research has picked up a fervent pace in the area of fault diagnosis of electrical machines. Maintenance management of electrical equipment condition. Condition based maintenance requires an investment in measuring equipment and staff upskilling so the initial costs of implementation can be high.
The manufacturers and users of these drives are now keen to include diagnostic features in the software to improve salability and reliability. Condition monitoring techniques of power transformers. Condition monitoring of electrical assets using digital. Compilation part notice rtmfentr of this paper is a part of the following report.
Condition monitoring using computational intelligence. A piezoelectric transducer providing a voltage signal proportional to acceleration is often used. Service life of electrical cable and condition monitoring. Electrical equipment of electrical installations and the application of condition monitoring techniques to optimise the asset utilisation as part of the asset management strategy. As one step toward the future smart grid, condition monitoring is important to facilitate the reliability of grid asset operation and to save on maintenance cost 1. Condition monitoring techniques have gained importance over the years in an effort to tackle problems such as the following. We know that transformer failure is inconvenient and costly. Partial discharge pd techniques for measuring the condition of ageing hvmv switchgear by neil davies, director, ea technology international throughout the world, the electricity transmission and distribution industry is experiencing major issues. Temperature speed visual sound electrical discharge curents vibration lubricant condition skf generalpurpose thermometer pen tmtp 200 accurate contact temperature measurement of general equipment. Guidance notes on equipment condition monitoring techniques. Predictive maintenance by electrical signature analysis to. Basic condition monitoring instruments skf basic condition monitoring tools can be used to check a number of properties. This is done by observing the deviation of the transformer parameters from their expected values. Condition monitoring of transformers is the process of acquisition and processing of data related to various parameters of transformers so as to predict and prevent the failure of a transformer.