Specifications include, but are not limited to: Phase 1: At the South old substation building and after Owner personnel have unloaded all the breakers and opened them, Contractor will open cross over pullouts from North electrical grid-work to South transformer. This will de-energize South transformer. Contractor will then roll out every breaker in the South substation to clean and lubricate all moving parts and 2400-volt connections. While breakers are out, test and verify all trip settings are at the correct setpoints on all the breakers. Provide report of calibration settings. Open rear panel covers behind breakers and clean and check for any oxidation and re-torque all connections if needed. Caution: Breaker #3 suppling power to A18, A17, A25 is energized on the load side of breaker connections. Power is coming from VCB breaker #1 in the North substation, to service those connections, there are three options. Administration (A-25) and lab (A-17) buildings are on this circuit, so downtime needs to be limited to two hours. or less. • Option 1 is to open #1 VCB breaker in the North substation (suppling power to load side of #3 breaker) no later than 5:00 a.m. Completing the required work and reenergizing power by 7:00 a.m. (letting admin & lab stay powered down during this time). • Option 2 is to do this portion of work during a Saturday and again letting admin and lab stay powered down with no two-hour time limit. • Option 3 is to open breaker #1 in North substation and the stacked hooter connections can be separated at the A17 transformer to isolate supply voltage to those two buildings. This would require two short outages and could be scheduled during a normal work week (the earlier the better). Phase 2: On the South electrical grid, all overhead connections are to be checked for any oxidation and cleaned if needed and connections including the transformer repaired or replaced and retorqued. All moving parts on cutouts cleaned and lubricated for smooth operation. After the second phase is completed and Contractors have closed all cutouts and power has been restored to the South transformer and the South old substation, Owner personnel will close all the breakers in the South substation. In a timely manner (not to exceed two weeks), Owner personnel will transfer all plant loads over to the South substation. Phase 3: Owner’s staff will then open all breakers in the North substation. At this time, the Contractor will open the cutouts after the secondary of the North transformer. Contractor will then un-rack every breaker to clean and lubricate all moving parts and 2400-volt connections. While breakers are out, test and verify all trip settings are at the correct setpoints on all the breakers. Provide report of calibration settings. Open rear panel covers behind breakers and clean and check for any oxidation and re-torque all connections as needed. Caution: As noted in Phase 1, load side of #1 VCB breaker will be energized from old South substation. As stated earlier follow one of the 3 options listed to fully de-energize #1 VCB breaker. Phase 4: On the North electrical grid, all overhead connections are to be checked for any oxidation and cleaned, repaired, retorqued as needed, Connections including the transformer shall be repaired or replaced and retorqued. All moving parts on cutouts cleaned and lubricated for smooth operation. After the fourth phase is competed, Contractor will close all cutouts and power will be restored to North transformer and North Substation. Owner personnel will close all VCB breakers in North substation. Note: Phases 1 and 2 can be completed during the same time. The same applies for Phase 3 and 4. Contractors will clean up all debris and leave substation grounds as found. 1. Owner staff will provide the location of cutout locations and all connections that require servicing as well as existing breaker trip settings. 2. The Owner will provide personnel to assist as required within this scope. 3. Contractors to provide all necessary tools, equipment, personnel, safety protection and any additional safety protocols to complete work in a timely manner.
