1.0 INTRODUCTION

1.1 This section briefly describes about the maintenance schedules, which are normally adopted by the utilities for the various sub-station equipments. The periodicity for the various tasks to be performed has also been specified. The test results obtained during the maintenance activity have to be approved by the appropriate authority, which may vary from utility to utility.

2.0 MAINTENANCE SCHEDULES

2.1Maintenance schedules as generally adopted by the power utilities for the various sub-station equipments are given in Annex (1-11).

Annex 1

Preventive Maintenance Schedule for Transformers and Reactors

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Annex 2

Preventive Maintenance Schedule for Circuit Breakers

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Annex 3

Preventive Maintenance Schedule for Current Transformers

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Annex 4 to be inserted

Annex 5

Preventive Maintenance Schedule for Isolators and Earth Switches

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Annex 6

Preventive Maintenance Schedule for Surge Arresters

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Annex 7

Preventive Maintenance Schedule for Bus-Bar, Jumpers, Connectors, Clamps, Switchyard Illumination etc.

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Annex 8

Preventive Maintenance Schedule for 400 kV Filter Capacitor

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Annex 9

Preventive Maintenance Schedule for Wave Traps

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Annex 10

Preventive Maintenance Schedule for Protection Systems

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Please click here to view & Take the print of the Annexure 10 Contd

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