[util] Electrical Power Interruption / Switching

[Anne Hodges]

ELECTRICAL POWER NOTICE FOR
Downtown Campus Buildings

TO:  All Departments with space in UH, Gamma Knife, East Wing, East Tower, CWB, Weiskotten Hall Addition, Weiskotten Hall, Setnor, NAB, Clark, CAB & Jacobsen Hall
FROM:           Marc Dingle, Electrical Facilities Manager
SUBJECT:      Electric Power Interruptions for UH, Gamma Knife, East Wing, East Tower, CWB, Weiskotten Hall Addition, Weiskotten Hall, Setnor, NAB, Clark, CAB &                                 Jacobsen Hall.
TODAY’S DATE:       June 10, 2025
 On Saturday, June 14, 2025, 5:00 am to 7:00 am;  Rain delay date: Saturday, June 28, 2025

In order to perform preventive maintenance on our Substation, one of our incoming National Grid feeders will be switched offline. We will be conducting switching to building feeds listed below between the hours of 5 am to 7 am. and again, later in the afternoon once work is complete. This will cause power losses from 1 to 10 seconds while we do the switching. Emergency power circuits will see a loss similar to generator testing both in the morning and again in the afternoon. Not all areas are affected in the afternoon. If the switching cannot occur on Saturday afternoon, we will conduct switching Sunday morning starting at 5:00 am.

***East Wing- Please use OR’s 3, 5, and 8 prior to switching and until an all clear is given in the morning.  MRI #2 and CT #1 will also be impacted and should be shut down during switching.

This is what you can expect to happen starting at 5:00 a.m. and again sometime in the afternoon once work is complete. Not all areas will be impacted in the afternoon.

Weiskotten Hall Addition, Weiskotten Hall, Medical Library, and NAB; Some of the normal power circuits will lose power for 1-10 seconds while we conduct switching in the morning. Emergency power will see a loss similar to monthly generator testing. The elevators in WHA will also be affected during the times we transfer power.

Clark Hall, CAB, and Jacobsen; All normal power will go offline at 6:00 AM Saturday and will come back on at approx. 8:00 PM…These buildings will be on emergency power only during this time.

UH, CWB, East Wing and East Tower; Will experience a loss of some of your normal power circuits for 1 to 10 seconds while we conduct switching. Emergency power circuits will see a loss similar to monthly generator testing. We will attempt to switch back in the afternoon once work is complete. If we can not due to activities in the buildings we will perform switching Sunday morning at 5:00 am.

Setnor, and Gamma Knife; Some of the normal power circuits will lose power for 1-10 seconds while we conduct switching in the morning only. Emergency power will see a loss similar to monthly generator testing.

Please turn down (low fan speed and warmer thermostat settings) all non-patient care/research window air conditioners and any other unnecessary administrative power users (computers, coffee pots, etc.) for the day.  This helps limit the amount of electrical loading that has to be switched and served by each building’s alternate system.

Other buildings (Cancer Center, and Silverman etc.) are not affected.
If you have any questions, please contact Marc Dingle at 4-8923 or 680-323-1819



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