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texasheart

Main Substation (MSS1) 13,800 volts. Circulatory System. Building transformers 480 volts. texasheart.org. Analogies: Chest Pain = Corona Minor Stroke = Tracking Cardiac Arrest = Arcing (may not be able to resuscitate electrical system).

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texasheart

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  1. Main Substation (MSS1) 13,800 volts Circulatory System Building transformers 480 volts texasheart.org Analogies: Chest Pain = Corona Minor Stroke = Tracking Cardiac Arrest = Arcing (may not be able to resuscitate electrical system)

  2. All pictures of actual conditions: July 2014 Our electrical infrastructure Damaged insulation Rust ~50 yr. old conductor Heat damage Bird caging

  3. Items performed to date (no outage) • Installed temporary power quality monitors • Main substation and key building substations • Ultrasound testing • All substations • Discovered arcing, tracking and corona • Identified arcing in Basic Science Building & Med School • Replaced breakers • Started Electrical Coordination Study • Transformer Oil Sample Testing • Removed LIB (temp. HVAC load) and ALTC (temp. load) • Refurbished main and building substation breakers

  4. Short Term (outage-6hr mid Sept) Open MSS1 and insulate wiring Hi pot MSS1 Replace oil in transformers

  5. Recommendations ( Jan outage) • Replace MSS1 • Main 13,800 volt substation is at its end-of-life. • MSS1 is the heart of the electrical system. It serves as a 13,800 volt “pump” for the entire Long Campus. • MSS1 was purchased, as a used item, from CPS Board (today known as CPS Energy) ~50 years ago. • Replace oldest conductors • MED lines are the oldest. • Rework all building substations transfer switches, breakers, bus bars. • Perform another ultrasound test after outage is complete to compare against prior ultrasound test performed before the outage.

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