ROTARY ELECTRICAL SERVICES LTD RESIDUAL LIFE ASSESSMENT (RLA) SERVICES Rotary Electrical Services Limited 58-64 Campo Lane SHEFFIELD S1 2EG UK Tel: +44 114 276 9901 Fax: +44 114 272 5073 e-mail: [email protected] web: ROTARY RESIDUAL LIFE ASSESSMENT SERVICES ELECTRICAL ROTATING MACHINES
ROTARY ELECTRICAL SERVICES LTD RESIDUAL LIFE ASSESSMENT (RLA) SERVICES Condition Based Maintenance (Predictive Maintenance) is considered as a productive tool because it helps eliminate unscheduled downtime of expensive equipment and reduce the overall cost of maintenance. This approach relies on planned inspections, testing, analyzing and trending of the relevant equipment parameters, which determine equipments health and must be followed by proactive actions that change the way equipment is operated to reach the goals set out above. The concept of simple replacement of power equipment in the system considering it as weak or a potential source of trouble is no more valid in the present scenario of financial constraints. Today the paradigm has changed and efforts are being directed to explore new approaches / techniques of monitoring, diagnosis, life assessment and condition evaluation and possibility of extending the life of existing equipment. In this effort of extending the life of existing equipment, we offer a package involving residual life assessment and condition evaluation of electrical rotating machine. This document consists of methodology involving residual life assessment technique for electrical rotating machine, scope of work, various requirements for residual life assessment and time involvement. The main objective of this residual life assessment will be to generate a report which gives the information to achieve following tasks ° To arrest the deterioration in performance ° To improve the availability, reliability, efficiency and safety of equipment. ° To regain lost capacity ° To extend useful life beyond design life and save investment on new equipment.
ROTARY ELECTRICAL SERVICES LTD RESIDUAL LIFE ASSESSMENT (RLA) SERVICES Failure of insulation is considered to be major factor in electrical rotating machine. Aging of insulation generally follows a chemical rate degradation curve and in addition is severely affected by the number of stops and starts, the frequency of stops and starts as well as large load variations. In addition, the stresses imposed on the insulation designed today, are at levels higher than ever before, which are further aggravated by environmental conditions, presence of contamination, partial discharges and such other physical conditions, thereby increasing the requirement to assess machine reliability with greater accuracy. IEEE and EPRI survey: Causes of failure in Stator Windings Besides for a plant, smooth power generation with minimum outages, maximum availability of generators with reduced breakdowns/faults and minimum downtime holds the key to enormous savings and profits.
- Spring '18
- Strength of materials, Tensile strength, Stator, RLA