The checklists are in pdf format and can be completed electronically or printed and used as hard copy. Induction motors installation operation generators. The motor is mounted in a test rig that allows one to control the torque applied to the motor shaft and to measure both rpm and torque. The ideal motor maintenance program aims at preventing breakdowns rather than repairing them. Maintaining induction motors electrical contractor magazine. Servicing your hvac system can reveal leaks, rust or wear and tear, so check in with your local trane dealer each season. Electric motor predictive and preventive maintenance guide. Which tool or combination of that works best for your facility depends on the type, location and accessibility of assets. The kits contain the components that are changed during specific maintenance procedures. A well planned electric motor preventive maintenance programme is the key to dependable, longlife operation of electric motors. Scheduling regular preventive maintenance is the best way to ensure peak performance. Standard for an electrical preventive maintenance epm. The following schedule of preventive maintenance can minimize or eliminate this problem. Ensure that the connectors are properly used and installed in accordance with manufacturers specifications.
Including the motors in the maintenance schedule for the driven machine or general plant equipment is usually sufficient. Electric motor predictive and preventive maintenance guide electric motor failure could result in lost capacity as well as excessive repair and maintenance costs. Do not lift both the motor and driven equipment with the motor lifting means. Abb maintenance kits help to cut maintenance times. Induction motor theory jerry bednarczyk, pe course content introduction the ac induction motor is well suited to applications requiring constant speed operation. Preventive maintenance for synchronous motors and generators. Basic variable frequency drive maintenance tips as we have seen, increasing pressure to improve financial performance is driving a change in the way end users approach control of production, engineering, operations, and maintenance across the manufacturing enterprise. Almost all electrical equipment requires planned inspection and maintenance being carrying out. Preventive maintenance of electric derive systems with induction motors involves. Using this data, you can create a custom maintenance schedule based on selected operations. Preventive maintenance keeps induction systems in peak. Only then is it possible to maintain a motors life and its efficiency. If you are in the constant failure phase, and you replace a part you often move back to the infant mortality phase, with a higher failure rate. Maintenance safe maintenance practices performed by qualified personnel are imperative.
Horizontal squirrel cage mediumvoltage induction motor. Polarization index, ohmic resistance, unbalanced current and others less ordinary like. Motors need maintenance regularly in order to avoid failure and prolong their lifespan. Standard for an electrical preventive maintenance epm program page 210 andor connectors are used together, examine connections for signs of galvanic action. I realized that just insulation resistance is enough. This guide provides information on establishing an effective maintenance program to help prevent unexpected motor failures, costly downtime, and unnecessary maintenance costs. In general, the induction motor is cheaper and easier to maintain compared to other alternatives. Modern equipment helps maintenance technicians predict or identify imminent failures before they cause costly unplanned downtime of motors and. Generally speaking, motors and motor parts should be maintained and tested at least every 6 months. Preventive maintenance in induction motors servo motor. Pump and motor preventative maintenance program thank you for this opportunity to provide your facility with a proactive preventative maintenance program.
I like to be efficient and simplify the job for techs. Although management probably realizes the value of a good preventive maintenance pm program, they. Motors and drives predictive motor maintenance motor. Here is a quick list to help you stay on top of maintenance for your conveyor system. Build trust and loyalty as an oemknowledgeable consultant to your customers and increase revenue per customer visit. Preventative maintenance is only effective in the wearout phase. Performing electrical preventive maintenance can be done with the help of a number of technology tools. Before starting maintenance procedures, be positive that. The squirrel cage induction motor was designed for an extended service life under very demanding conditions. Motor maintenance scheduled routine care introduction the key to minimizing motor problems is scheduled routine inspection and service. Clean the exposed coil surface each work shift using a clean damp rag to remove any carbon and scale buildup, which can cause an. Induction motor maintenance february 17, 2019 february 24, 2012 by electrical4u maintenance as the name suggests it is the action necessary for retaining or restoring a piece of equipment or machine to the specified operable condition to achieve its maximum useful life. If left running under rated conditions, an induction motor will provide many years of troublefree service and may even outlast the building. Breakdown maintenance works by running equipment until it breaks down, in which.
The main objective of this chapter is to present a procedure to acquire and analyze electrical signals for condition monitoring of electrical machines through motor current signature analysis in order to get the best possible results in an industrial environment. This provides a solid foundation for the companys maintenance services. Preventive and predictive maintenance 700zb00102 42 preventive predictive maintenance the guiding principle of ppm is the regular and systematic application of engineering knowledge and maintenance attention to equipment and facilities to ensure their proper functionality and to reduce their rate of deterioration. Preventive, which test we use on induction motors on 380 v. An electric motor that is well cared for will last for years and provide you with ongoing reliability. Motor current monitoring and analysis mcsa is a straight forward tool to diagnosing problems with large inductive motors. Apply an antioxidant compound to all aluminumto copper connections.
Concerning motor condition monitoring through nonintrusive electrical methods in brazil. This type of maintenance can be very effective if the ability to shutdown or do any kind of motor repair is exceptionally high while the. Documentation of storage maintenance, alignment and regreasing may be required for certain warranty considerations. But, the books and others literatures show another tests like. Preventive maintenance and breakdown maintenance both seek to maintain and repair equipment, but they have very different ways of doing this. The high cost of the resultant downtime eats deeply into profits. Maintenance and troubleshooting three phase induction motor. While the system is in operation, check the following issues and refer to all relevant safety warnings and information. Regular motor maintenance to avoid failure and prolong.
Abb preventive maintenance abb maintenance abb service. A well planned preventive maintenance program is the key to dependable, longlife operation of motors and generators. Preventive maintenance, electrical preventive maintenance. Conveyor safety and preventive maintenance industrial. The frequency of routine service varies widely between applications. Predictive maintenance by electrical signature analysis to induction motors 491 interesting and little explored field surfaces, which is the. The words preventive maintenance and starters and alternators are seldom included in the same sentence. You should also make a dc measurement of stator winding linetoline resistance using a dmm. Preventive maintenance provides original equipment manufacturer oem maintenance schedules.
Preventative motor maintenance pm is a calendar or timebased planned or schedulebased maintenance program where actions are scheduled regardless of the actual condition of the equipment. The key to reliable operation of motors is having a checklist in place in the form of a preventive maintenance. Preventive maintenance for synchronous motors and generators abb has been manufacturing and maintaining motors and generators for more than 100 years. Simple steps to electric motor maintenance r baker. For the most part, we think of starters and alternators as limited life span electrical components, with little in the way of preventive maintenance requirements. Systematic and periodic inspections of motors are necessary to ensure best operating results. Factors which affect the life span of the motor due to lack of maintenance. Preventive maintenance identifies any issues before equipment failure or downtime, through routinely scheduled maintenance. For abb preventive maintenance level l3 insitu robotic visual inspections abb preventive maintenance level l3 involves a larger outage, normally performed every 32,000 40,000 operating hours1 when several parts of the motorgenerator, including the end shields, are removed but the rotor is left in place. In modern plant operations, unscheduled stoppage of production or long repair shutdowns are intolerable. The induction motor is made up of the stator, or stationary windings, and the rotor.
Static motor test data provides visibility into the integrity and condition of a motors insulation and motor circuit. This ensures electrical equipment is kept in good working condition at all times. Although management probably realizes the value of a good preventive maintenance pm. Spare parts planning and control for maintenance operations.
However, should the motor require service, this manual includes a section that assists the. Predictive maintenance by electrical signature analysis to induction motors 505 in which taps was inserted to the gradual introduction of imbalance in power depending on. Induction motor testing and evaluation summary as energy costs rise, more emphasis is being placed on determining the health of large inductive motors. The very first thing that you should do before starting any type of maintenance on a motor is a visual inspection, a lot of times the trouble can be found just by looking, because if the problem is that bad then it should be very obvious by observation. Preventive maintenance of induction motor electrical mastar. Breakers that remain idle for 6 months or more should be made to open and close. Squirrel cage wound rotor with slip rings the rotating magnetic field the basic idea of an electric motor is to generate two magnetic fields.
Warranty see your sales contract for warranty coverage. The most important part about performing preventive maintenance is that is must be planned and be consistent. Predictive maintenance by electrical signature analysis to. Servicing your hvac system matters trane systems are designed for optimal efficiency and comfort. Appropriate maintenance can then be scheduled at a planned downtime, avoiding a. Electrical inspection checklists this pdf contains 77 electrical inspection checklists taken from the 2014 electrical inspection manual with checklists. They begin life with all of the other new parts when the vehicle is assembled.
As the demands on inhouse manpower increase, do more with less mentality, we are finding pumps and motors failing at alarming rates. The maintenance part of the rcm analysis has also been studied, to facilitate the creation of an optimum packaging of preventive maintenance tasks, which. Preventive maintenance is an investment in the avoidance of failures the program can eliminate disruptions to your production and help you secure your longterm competitiveness. Preventive maintenance is planned to take environmental and operating conditions into account. The need for maintenance of circuit breakers is often not obvious as circuit breakers may remain idle, either open or closed, for long periods of time. Predictive maintenance by electrical signature analysis to induction motors 505 in which taps was inserted to the gradual introduction of imbalance in power depending on the insertion of short. Motor preventive maintenance motor preventive maintenance, especially for small induction motors, is more than just inspecting and maintaining the motor itself. In a good preventive maintenance program with detailed checks, the person in charge should have a record card on file for every motor in the plant.
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