Transformer maintenance & its importance
aintenance is an engineering and management function with the following objectives: Ensure reliable service throughout the life of an equipment Put back an equipment which has brokendown into satisfactory working condition in a minimum possible time, keep the maintenanace cost at lowest pssible. Necessity for Maintenance: The continuity of power supply from a transformer depends not only on the care with which a transformer has designed and constructed it, but also the steps taken by the user to carry out regular checks or its working conditions.
Upon installation of the transformers, all steps must be taken to ensure that it functions normally, particularly with regard to cooling, auxiliaries and the protective devices. Moreover the layout of the substation must allow sufficient space for handling and installing the transformer while maintaining the required safe distances from live parts for personnel to work.
The diversity and scope of maintenance operation vary with the type of Transformers, its power and its relative importance in the
MPROFILE supply system. Each user develops his own routines, appropriate to his needs. A certain number of general guidelines can be given but the ways in which they are applied or subjected to wide variations. Consumers expect continuous power supply. Breakdowns affect the industrial output and economy in case of transformer failure, it takes considerable time to resume power supply. Transformers are costly; procurement time varies from 2 to 20 weeks depending on the type of transformer. Objectives of maintenance are to ensure continuous power supply taking into account the planned and the peak loads; prevent enforced stoppages; enhance the life of transformer; and, achieve cost effectiveness. As stated earlier that there is no escape from normal long term ageing process. Premature failure can be avoided by proper maintenance. Preventive maintenance is the key to keeping the equipment healthy and in service .The type of maintenance practices being followed usually are: routine; corrective; planned; preventive; proactive; time-based maintenance; condition-based; design out; emergency and reliabilitycentered.