ITS Service Status Report

Emergency Maintenance — Resolved

Data Center Services, MACC

Start Time: 06/16/2018 8:00 am

Maintenance Completed: 06/16/2018 1:08 pm

None. The redundant power source "B" will be inoperable throughout the maintenance window.

The Data Center load will run on power source "A" throughout the maintenance window with Full UPS and Generator Backup.

Issue Symptoms: Degradation

Technical Details

Service Type: Production

Transformer repair have concluded. Transformer "B" is back to full functionality.

GSI Electrical Service and Power Plus Electrical Services will be performing the correctives identified in the 2nd quarter MACC Data Center inspection and preventative maintenance performed on Saturday, May 19th.

In the MACC May 19 preventative maintenance an oil leak in the X0 & X1 secondary bushing was found in transformer B.

Repair sequence:

Drain the fluid through a filter process machine which will remove sediment larger than 1 micron while reducing moisture levels in the oil.
Once the fluid level has been drained below the work area the bushings will be removed and new gaskets installed
Fluid will be returned to the transformer.
All equipment will be tested per NETA MTS 2015 Specifications prior to re-energizing.
A shut down of approximately 6-8 hours will be required.

The MACC data center will not be interrupted in any way but will be running on one power source A throughout the maintenance window with Full UPS and Generator Backup.

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