Proper Maintenance of Fuse Gaps in HT/LT Side of the Transformer:
Improper maintenance of the fuse gap setting results either in frequent blowing of fuses or non-blowing of fuses while needed. The desirable fuse gap setting is given in Table 10. Adequate gap setting will avert transformer failure and therefore enhance its life.
Table: Appropriate Fuse Gap Setting
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Type of Fuse Gap
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Fuse Gap Setting
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11 kV HG fuse gap
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8 inches
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22 kV HG fuse gap
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10 inches
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LT open type feeder fuse gap
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6 inches
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With this discussion on several ways of enhancing transformer life through paying proper attention to its operation and maintenance, we end here. Here you have studied significant aspects related to distribution transformer, reasons of transformer failure, transformer testing and ways of enhancing life and efficiency of transformer through paying attention to the operation and maintenance aspects of these transformers. Let us now present the summary of its contents.