Exhibit N - PT-12 BLDG 29 Test Report.pdf

Prepared By:

Chris Espartero Sr Field Service Representative

North America Service Operations

Houston, TX

BLDG 29 Substation

July 3, 2021

Work Order: 08391081

2 | P a g e

EXECUTIVE SUMMARY

Schneider Electric Services perform BLDG 29 Power distribution Transformers PM in accordance with project specification and applicable industry standard located at VA Campus 2002 Holcombe

Blvd Houston, Texas 77030. The site contact for this project was Joe Ceasar of VA Medical Center

Electrical Power Distribution Department (713)806-7506.

PT-12 BLDG 29 Transformer

We were not able to pull oil samples on the power distribution transformer due to transformer being under vacuum/ negative pressure and transformer not equipped with a fill port for nitrogen filling. Schneider electric service highly recommends installing nitrogen fill port on all the liquid filled transformer and run an external piping that will allow the transformer oil sampling while the transformer is still energized. This will eliminate having a power outage for transformer oil sampling.

Transformer excitation current did not conform to a known pattern. This may be due to the core being magnetized during dienergization. With the limited time, it was not enough to allow the magnetism to dessipate before any electrical testing is performed. However the TTR and winding resistance test results are all acceptable which proved that the transformer winding are in good, acceptable condtions.

BLDG 29 Fire Pump ATS Breaker

Fire pump breaker failed operate during secondary injection test. Schneider Electric Service

Recommends that the ATS breaker will need to be replaced. The circuit breaker may not operate during a fault codition which could result to a costly repair and injury to personel.

If there are any questions or concerns, please contact:

Chris Espartero

832-205-1547

Christopher.Espartero@se.com

BLDG 29 XFMR_871049-F1_X2

TwoWindingTransformerReport Source

6/26/2021 9:59:38 AMSession Test Date

Nameplate - Two-winding Transformer Company VA Medical Center Serial Number 871049-F1

Location 2002 Holcombe Blvd Houston, Texas 77030

Special ID BLDG 29 XFMR

Division Houston Circuit Designation PT-12 XFMR

Manufacturer Square D Electric Configuration Δ-Y Year Manufactured 1988 Tank Type Sealed

Mfr Location USA Coolant Oil

Phases Three Class OA

Oil Volume 265 UG BIL 95 kV

Weight 5010 LB kV 12.47, 0.48 VA Rating 500, *, *, *, KVA

Administration Test Date 6/26/2021 Test Time: 9:59 AM Weather Partly Cloudy

Air Temperature 27°C Apparatus Temperature

40°C Humidity 80 %

Tester Cory Llewellyn Work Order WO-08754081 Date Last Tested

Verified Test Set Type M4000 Date Retested

Verification Date 6/26/2021 Set Top Serial # Reason ROUTINE

Last Sheet # Set Bottom Serial # Travel Time

Purchase Order Ins. Book # Duration

Copies Sheet # Crew Size 2

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Session Notes

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Bushing Nameplate Designation Serial # Manufacturer Type C1 %PF C1 Cap C2 %PF C2 Cap Rated kV Amps

H1 H1 * * * * * *

H2 H2 * * * * * *

H3 H3 * * * * * *

Overall Tests Insulation Test kV mA Watts % PF

Corr.

Corr Fctr Cap (pF) FRANK™ Manual

1 CH+CHL 10.003 17.824 0.757 0.273 0.643 4727.965

2 CH 10.004 3.972 0.158 0.256 0.643 1053.459 Good

3 CHL(UST) 10.004 13.848 0.605 0.281 0.643 3673.161 Good

4 CHL 0 13.853 0.599 0.278 0.643 3674.506

5 CL+CHL 1.000 30.127 1.096 0.234 0.643 7991.240

6 CL 1.000 16.299 0.519 0.205 0.643 4323.290 Good

7 CHL(UST) 1.000 13.835 0.599 0.279 0.643 3669.869

8 CHL 0 13.828 0.577 0.268 0.643 3667.950 Good

LSR mA: 17.824/17.824, 1/1 Watts: 0.757/0.757, 1/1 Cap (pF): 4727.965/4727.965, 1/1

LSR mA: 3.972/3.972, 1/1 Watts: 0.158/0.158, 1/1 Cap (pF): 1053.459/1053.459, 1/1

LSR mA: 13.848/13.848, 1/1 Watts: 0.605/0.605, 1/1 Cap (pF): 3673.161/3673.161, 1/1

LSR mA: 13.853/13.853, 1/1 Watts: 0.599/0.599, 1/1 Cap (pF): 3674.506/3674.506, 1/1

LSR mA: 30.127/30.127, 1/1 Watts: 1.096/1.096, 1/1 Cap (pF): 7991.240/7991.240, 1/1

LSR mA: 16.299/16.299, 1/1 Watts: 0.519/0.519, 1/1 Cap (pF): 4323.290/4323.290, 1/1

LSR mA: 13.835/13.835, 1/1 Watts: 0.599/0.599, 1/1 Cap (pF): 3669.869/3669.869, 1/1

LSR mA: 13.828/13.828, 1/1 Watts: 0.577/0.577, 1/1 Cap (pF): 3667.950/3667.950, 1/1

FRANK™ Message 2 (Good) - For this transformer, the upper % power factor limit for a "G" rating is 1.0 and the upper % power factor limit before an "I" rating is 1.5

The humidity is high, equal to or more than 70%. This may cause the watts and power factor to be higher than usual on your tests. If you compare sets of duplicate apparatus (arresters, bushings, live tank breakers) and one alone shows a high power factor, consider it suspect. but if all three duplicates all have high power factors, it may be due to the factor common to them all, the high humidity. Clean and dry, using heat if necessary, for better results.

3 (Good) - All values are acceptable.

6 (Good) - All values are acceptable.

8 (Good) - All values are acceptable.

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Winding Resistance

DETC LTC Phase Resistance Units Calculated Resistance

Correction Factor

Corrected Resistance

Percentage Deviation

3 A 559 milli Ohms * * * *

3 B 554 milli Ohms * * * *

3 C 553 milli Ohms * * * *

High Voltage

DETC LTC Phase Resistance Units Calculated Resistance

Correction Factor

Corrected Resistance

Percentage Deviation

3 A 1.971 milli Ohms * * * *

3 B 1.891 milli Ohms * * * *

3 C 1.883 milli Ohms * * * *

Low Voltage

Winding

Manufacturer Serial Number Configuration Winding Temperature

Temperature Rise

Factory Resistance

(Ohms)

Factory Temperature

Δ-Y * * * *

Exciting Current Tests Manufacturer Type Steps Boost % Buck % Position Found Position Left Oil Volume

DETC 3 3 *

H3 H1 H1 H2 H2 H3

DETC LTC Test kV mA Watts X mA Watts X mA Watts X FRANK™ Manual

3 7 26.689 231.795 L 17.783 153.997 L 29.655 243.969 L Investigate

LSR mA: 26.689/26.689, 1/1 Watts: 231.795/231.795, 1/1 Cap (pF): */*, 1/1

LSR mA: 17.783/17.783, 1/1 Watts: 153.997/153.997, 1/1 Cap (pF): */*, 1/1

LSR mA: 29.655/29.655, 1/1 Watts: 243.969/243.969, 1/1 Cap (pF): */*, 1/1

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Turns Ratio Tests Serial Number HV Winding LV Winding

Delta Wye

Connections - - -

Tap NP Volt Tap NP Volt Cal Ratio 1 Ratio 2 Ratio 3 Min. Lim Max. Lim FRANK™ Manual

3 12470 3 480 44.997 45.012 45.016 45.038 44.772 45.222 Good

FRANK™ Message 1 (Good) - Ratio is within expected values.

TTR results are considered acceptable if the measured value is within 0.5% of the calculated value. Anything outside this range is cause for further investigation.

Exciting Current Plot

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