ABB-Substation-Condition-Monitoring-Schedule(2)

1) INTRODUCTION

This guideline is prepared in view of the requirements for switchyard service inspection (visual) and condition based maintenance of substation equipments, structures and other miscellaneous items in substations. These guidelines are necessarily general. It is recommended to carry out maintenance of equipment as per manual supplied by manufacturer. All inspections and test procedures should also be performed in accordance with applicable codes and standards.

The aim of this guideline is to provide in general visual inspection check points for the structures, grounding systems, LT switchboards, etc. for which as such there is no readymade guidelines available. Also to provide the visual inspection and condition based maintenance of Major equipments like Transformer, Circuit breakers, CTs, CVTs, PTs, Disconnectors and LAs etc. to verify the health of the equipments.

Service visual inspection is the necessary activity to identify any visible abnormality or failure and require to be performed at specified interval. Whereas condition based monitoring checks (on line/ off line) are necessary to identify internal defects or abnormality, so that necessary preventive action can be taken up.

2) SERVICE INSPECTION & CONDITION MONITORING GUIDELINE

The substation in total and the individual items of equipment contained therein should be periodically inspected. Binoculars should be used to view buses and other equipment located on structures.