The purpose of this manual is to explain how the transformer should be installed, commissioned, operated and maintained in general. In addition to the instructions given in the manual, reference should be made to :
IEC-60076 Power Transformer
IEC-60296 Specification for unused mineral insulating oils for Transformer & Switchgear
IEC- 60137 Insulating Bushing for alternating voltage above 1000V.
IEC-60354 Loading Guide for oil immersed power transformer.
IEC-60364 Specification for Gas operated relays
IEC-156 Method for the determination of the electric strength of insulating oils.
IS-10028 Code of Practice for Installation of Transformers.
IS-335 Code of Practice for Maintenance of Transformers
IS-1866 Code of Practice for maintenance of Transformer oil
IS-1646 Code of Practice for Electrical Installation
Transformer is one of the most vital and important electrical machinery. The development of the present day power system is very much attributable to the large number and types of transformer that are in operation in the system, such as, generator transformers, step-up transformers, step-down transformers, interlinking transformers, power transformers & distribution transformers etc. Being a static machine, it is inherently reliable compared to other machines.
Distribution transformers are a important link between the power system and millions of electricity consumers. Any failure of this important equipment, apart from adversely affecting the consumers, will also mean considerable financial loss to the electricity undertaking. It is therefore of important that utmost care is taken in the design, manufacture, testing, installation, and maintenance of transformers
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