• Install Integrated Substation Condition Monitoring equipment to 96 11kV circuit breaker panels at seven Northern Powergrid primary sites.

• Collate data from installed equipment to a central server for a period of two years from the installation of equipment at the last site.

• Establish appropriate thresholds for alarm signals.

• Undertake analysis of the data periodically throughout the project to identify any correlation between variables or trends in circuit breaker performance.

Asset reports shall be produced at periodic intervals, typically each calendar month or other frequency set by the user.  The content and format of reports may typically include:

• Graphical representation of pd activity on each switchboard
• Trending of pd activity with appropriate alarm thresholds for high rates of change in activity
• Summary of circuit breakers tripped and plot of dc trip current profile for each event
• Representation of the cumulative energy (I2t) interrupted by each circuit breaker
• Graphical representation correlating pd activity and environmental conditions

• Successful installation of circuit breaker condition monitoring equipment and partial discharge monitoring equipment at 7 substations with a total of 96 panels

• Successful collation of data from installed equipment

• Production of asset performance reports to inform Maintenance Policy and asset replacement/refurbishment decisions

• Initiation of remedial work or other intervention to improve circuit breaker performance

• Improvement of circuit breaker performance in relation to Failure on Demand, slow opening, etc.

• Prevention of an incident relating to circuit breaker failure by triggering intervention

• Trending of partial discharge for specific circuit breakers and circuit breaker by manufacturer and type

• Establish appropriate alarm thresholds for each circuit breaker type

• Demonstrate trends in dc trip coil profile for specific circuit breakers and circuit breaker by manufacturer and type

• Establish acceptable profile envelope for each circuit breaker type

• Trigger post fault maintenance by I2t measurements

• Demonstrate the relationship between environmental operating conditions and the level of partial discharge activity

• Demonstrate the relationship between environmental operating conditions and dc trip coil profile