ABB AMA Series Manual

Contents

ABB AMA Series Manual Manual pdf 71 page image

Manual for Induction Motors and Generators56 - Maintenance 3BFP 000 050 R0101 REV EChapter 7 Maintenance7.1 Preventive maintenanceA rotating electrical machine often forms an important part of a larger installation and if it issupervised and maintained properly, it will be reliable in operation and guarantee a normallifetime.The purpose of maintenance is therefore to:• Secure that the machine will function reliably without any unforeseen actions orinterventions• Estimate and plan service actions in order to minimize down time.The difference between supervision and maintenance is rather diffuse. Normal supervision ofoperation and maintenance includes logging of operating data such as load, temperatures,vibrations, as well as verification of the lubrication, and measurement of the insulationresistances.After commissioning or maintenance, the supervision should be intensive. Temperature ofbearings and windings, load, current, cooling, lubrication and vibration shall be checkedfrequently.This chapter presents recommendations regarding maintenance program, and work instructionshow to conduct common maintenance tasks. These instructions and recommendations should beread carefully and be used as a basis when planning the maintenance program. Note that themaintenance recommendations presented in this chapter represent a minimum level ofmaintenance. By intensifying maintenance and supervision activities, the reliability of themachine and the long-term availability will increase.The data obtained during supervision and maintenance is useful for estimating and planningadditional service. In case some of this data indicates something out of the ordinary, the troubleshooting guides in Chapter 8 Trouble Shooting, will aid in locating the reason for the trouble.ABB recommends the use of experts in the creating maintenance programs, as well as inperforming the actual maintenance and possible trouble shooting. The ABB After Salesorganization is happy to assist in these issues. The ABB After Sales contact information can befound in Chapter 9.1.5 After Sales contact information.An essential part of the preventative maintenance is to have a selection of suitable spare partsavailable. The best way to have access to critical spare parts is to keep them on stock. Ready-made spare part packages can be obtained from the ABB After Sales, see Chapter 9.1.2 SpareParts.7.2 Safety precautionsBefore working on any electrical equipment, general electrical safety precautions are to be takeninto account, and local regulations are to be respected in order to prevent personnel injury. Thisshould be made according to instructions of the security personnel.Personnel performing maintenance on electrical equipment and installations must be highlyqualified. The personnel must be trained in, and familiar with, the specific maintenanceprocedures and tests required for rotating electrical machines.