Condition based maintenance electrical power system. Introduction since the loads having the trends towards growing density. This general specification for electrical installation is ed and all rights. Electrical engineering objective questions mcq with answer. Section 3 presents an overview of pd mechanism based measurement. This is the final report for the power systems engineering research center pserc research project titled a novel approach for prioritizing maintenance of underground cables. Case study and analysis of the production processes in a. This program expands on the existing field service offering from qualitrol and provides data analysis and training, as well as specialty testing, and failure investigation. Conveyor safety and preventive maintenance industrial. Sound knowledge of using hand and power tools like wrenches, hammers and screwdrivers.
To the novice, the concept of pipeline installation underground. Diagnostic tests used on new and on service aged cable systems. These limits should not be used for cables subjected to pulling tensions during installation. Also refers to the loss of a cable or cable plant when tested with an optical loss test set. Pm22 grounding system consists of the necessary labor and. Partial discharge pd monitoring is one of the successful diagnostic tools for accessing the insulation condition of mv cables. Electrical systems are mostly made up in the form of three phase configuration. Machines run longer if the right oils are used and if the oils are dry, clean and fit for use. The desired attributes for the ideal cable condition monitoring technique are presented along with a general discussion on the various properties of electric cable insulation that can be monitored to assess the condition of an electric cable and the dielectric integrity of cable insulation systems. Another important factor in the installation process is to make sure the duct work is sized properly.
User manual um2438 predictive maintenance reference. This relatively new approach to maintenance uses data drawn during operations andor maintenance intervals to forecast the need for additional or future maintenance. The mission of femp is to facilitate the federal governments implementation of sound, cost. Inspection, testing and commissioning of electrical. In this post provide you latest and updated 2019 2020 electrical mcq objective questions with answer which are help for preparation all electrical engineering exams like gate, ies, jto, psus, rrb jeaen, rrb loco pilot and technicians, ssc je, dmrc, lmrc, isro and other state level engineering exams. Ieee guide for the design and installation of cable. With significant challenges facing the electric industry and the world, we are always seeking top talent with handson experience to address issues as they relate to the generation, delivery, use, management and environmental responsibility of global electricity. Types of underground cables by kiran daware power system, underground cables. High voltage direct current hvdctransmission systems. Chapter 8 partial discharge pd hv and ehv power cable. Cable layout and system design the dimensioning of a high voltage cable system is always based on the specifications and demands of the project at hand.
On stranded cable, if ends are corroded, cut off ends or separate strands and clean internally. The following details are required for calculation. The next trend was computerized maintenance management systems cmms, and the latest trend encompasses asset management and maintenance, supported by various methods of condition based maintenance systems cbms and inservice inspection processes. Ieee guide for the design and installation of cable systems in substations 2.
Manual for transmission lines and substation construction. Therefore, the condition assessment and health index calculation are needed to effectively maintain the system. Standard for an electrical preventive maintenance epm. Mafijur rahman electrical and electronic engineer professional associates limited. Most of us think of piping systems as underground structures used to convey liquids of one sort or another.
Assessing the condition and remaining life of underground. Standard for an electrical preventive maintenance epm program page 410 connections. Predictive maintenance attempts to detect the onset of a degradation mechanism with the goal of correcting that degradation prior to signiicant deterioration in the component or equipment. Although a distribution system with underground cables is less maintenance intensive than one with overhead lines, it is necessary to have clear procedures for preventive, corrective and condition based maintenance in order to ensure a long trouble free operational life for the cables. Online pd detection on high voltage underground power cables by.
Here is a quick list to help you stay on top of maintenance for your conveyor system. While the system is in operation, check the following issues and refer to all relevant safety warnings and information. Qualitrol corp condition based monitoring to utilities. A comprehensive condition monitoring system for distribution network. In under ground cable system, the power is transferred from one point to.
Inservice oil analysis for condition based maintenance 9 benefits of inservice oil analysis the key benefits of inservice oil analysis are maintenance cost savings and productivity increases from increasing the uptime of running machines. Pm preventive maintenance pss power system stabilizer rcm reliabilitycentered maintenance. Power distribution system relies heavily on a vast network of medium voltage mv. Guide for survey based on preventative maintenance techniques. A windows version 7or higher pc with a serial line terminal application like putty. Systems diagrams 10 voltage rating 11 electrical formulas 11 section 3 voltage regulation 12 12. Every municipal water system has to have a water supply source that is both adequate and reliable for the. This will give a maintenance concept for cable circuits as part of the total maintenance policy for the network. Survey on the service performance on hv ac cable systems. Download as docx, pdf, txt or read online from scribd. The choice of whether to use overhead line ohl or underground cable ugc must be made keeping in view the safety, reliability and operational constraints. Engineering data for copper and aluminum conductor electrical cables. By 1996, not only transmission over 11 600 km at a bit rate of 5 gbits had been demonstrated by using actual submarine cables, but commercial transatlantic and transpacific cable systems also became available.
The diagnostic capabilities of predictive maintenance technologies have increased in recent years with advances made in sensor technologies. Condition based maintenance of mv power cable systems on the. High voltage xlpe cable systems techincal user guide brugg cables page 6 2. Condition based maintenance on mv cable circuits as part of asset management. Online condition monitoring tools can be used as a source for condition based maintenance. Nec requirements for generators and standby power systems 445. Repair and maintain system that control the temperature. Nec requirements for generators and standby power systems. What are the maintenance procedures for underground.
Condition assessment of underground cable system using. Inspect the structures and identify the cause of the problem. Supports the introduction of condition based maintenance concepts lowers the cost and harmonises maintenance and repair logistics broad health monitoring experience from various domains health and usage monitoring systems hums for helicopters with. Cable system tests 21 technological developments 22 ii accessories. There have been numerous advances in condition monitoring technology. Machinery and equipment repair and maintenance checklist. Water based fire protection systems 2017 edition reference.
Classification based upon construction of the cable 1. Engineering data for copper and aluminum conductor. Implementation of conditionbased maintenance for medium. Underground cable sizing is one of the most important concerns when designing distribution and transmission systems. Typical test voltage profile for commissioning and recommissioning tests for hv and ehv power cable systems using joint hopping or daisy chain pd measurement.
Standard for the inspection, testing, and maintenance of. Practical power cable ampacity analysis ced engineering. Thermal capacity, line currents, average current, ground current, motor. Epri is at the center of a quickly evolving energy landscape. Workplaces are maintained in such clean condition as it necessary to avoid hazards to persons at the workplace the workplace is kept clean and rubbish is removed. The consequences of ineffective equipment maintenance can be huge in terms of system. This report is available for downloading from the pserc website.
Condition based maintenance this checks underground power transmission cables and aboveground grid fixtures like joints and terminations that have already experienced partial damage. Once the load has been sized and confirmed, the cable system must be designed in a way to transfer required power from the the generation to the end user. Remove any corrosion on battery terminals with bicarbonate of soda. It helps to predict when and what kind of repairs might be needed in. Performed without disrupting service, online partial discharge testing is a nondestructive, noninvasive predictive maintenance tool that gauges the condition of aging cable systems based on measuring pds at the cable operating voltage.
Design, construction, operation and maintenance considerations in general, the basic parameters such as power to be. This is a project report from the power systems engineering research center. Monitor the work orders and repair jobs accordingly. In overhead power lines, a structure based network is used to transmit. A typical underground cable feeder spans over several kilometers from the substation. Online pd detection on high voltage underground power cables by acoustic emission. Condition based maintenance cbm offers the promise of enhancing the effectiveness of maintenance programs in a way that no other single concept has ever matched. Specifications and drawings for construction of underground plant, rus form 515b table of contents page. High voltage xlpe cable systems technical user guide. Culvert repair best practices, specifications and special.
Added recommended maintenance i added a flowchart in annex a that references each annex j added an example of cable system design in annex o for a small substation. Guard rails or other safeguards are provided on ramps and stairs. Specifications and drawings for underground cable installation, rus form 515d, issued may 25, 1989. Underground power cables high voltage underground cables 2 2 circuits 3000m 3x1x2000mm2 e. Figure 4457 1 the driving means for the generator can be readily shut down, and 2 the generator isnt arranged to operate in parallel with another. Systems are in place to ensure that the ground or floor is kept free from fall hazards and obstructions. Enhance power equipment reliability with predictive maintenance technologies.
Regularly walk around both sides of the system and note the condition, as well as any unusual behavior of all the moving components. With the online system, pd patterns and location of pd source can be. Check any underground cable installed for suitability chapter 3, 110. United states department of specifications and drawings. In this paper, uo is defined as the working system voltage between the conductor and. These guidelines will provide guidance to minnesota department of transportation mndot engineers in making better decisions on.
Condition based maintenance on mv cable circuits as part. Easement and vegetation management are addressed within the scope of the land asset methodology framework. All engineering books pdf download online, notes, materials, exam papers, mcqs for all engineering branch such as mechanical, electronics, electrical, civil, automobile, chemical, computers, mechatronic, telecommunication any all more popular books available here. Assessment of the heat flow in the underground cable systems. Check for corrosion protection of metal conduit or boxes 300. Power cable installation guide figure f5 multiple sheaves figure f6 sheave arrangements for feeding into cable tray training radius the training radius is the final positioning of cable ends after the cable has been placed in the raceway. Department of energys federal energy management program femp. Condition based maintenance cbm on power cable circuits is an important part of asset management in a. Represents an alternative method to electrical detection systems. This document contains the results of task d, best practices guidelines, for the culvert repair best practices, specifications and special provisions guidelines project. Results of the condition assessment are input for the economical and technical assessment. Guidance notes on equipment condition monitoring techniques. Chapter 7 underground installation of pe piping introduction piping systems are prevalent throughout our everyday world.
Pdf condition based maintenance on mv cable circuits as part of. Electrical engineering objective questions mcq with answer free pdf download. Assessing the condition and remaining life of underground electrical cables first edition december 2016 published by energy institute, london the energy institute is a professional membership body incorporated by royal charter 2003. Together with automatic fire suppression systems, fire detection and alarm systems are part of the active fire protection systems found in many occupan. We express our appreciation for the support provided by psercs industrial members and by the national science foundation under grant nsf. In order to design the best distribution system, the system design engineer must have information concerning the loads and a knowledge of the types of distribution systems that are applicable. Properly installed and maintained fire detection and alarm systems can help to increase the survivability of occupants and emergency responders while decreasing property losses figure 14. Generators must have one or more disconnecting means that disconnects all power, except where. Qualitrol is pleased to announce the introduction of our xpert services program providing indepth data analysis within the electrical grid.
It helps to predict when and what kind of repairs might be needed in the future, or if faulty sections need immediate replacement. Table 6 5 single conductor cable underground ducts one circuit, three cables in separate ducts 22. Pdf condition based maintenance cbm is an part of asset management in a liberalised market place for electric energy. Such construction is mainly employed if a river needs to be crossed or if the intended power. Data acquired by online pd measurements can help in identifying the upcoming faults in such cable networks and possibly forecast the remaining life of the insulation. Mobile monitoring of underground cable systems citeseerx. The underground cable system consists of power cable, termination, joint, manhole. Over sizing systems cost more and does not maintain the desired air flow and undersized duct work causes the system to strain mechanically and can be noisy. Fix the broken parts and giving final finishing touch to repair and construct repairs. A novel approach for prioritizing maintenance of underground cables. Online condition monitoring of mv cable feeders using rogowski. Launchcable a high quality fiber optic reference jumper cable used for loss testing,attached to a source and calibrated for output power. Either a wideangle global monitoring system or a distributed sensor network is. Pdf condition based maintenance on mv cable circuits as.