ATTACHMENT A HI-POT TEST SHEET DAG-3.pdf

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J061--FY25: Lake Nona Medium Voltage Repair
Solicitation number
36C24825Q0885
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This document is a Hi-Pot Test Sheet for electrical cable circuit DAG-3, dated 4/11/2025, detailing insulation resistance (IR) and high potential (Hi-Pot) test results for a medium voltage cable. The test measurements reveal significant electrical issues, particularly with the blue phase conductor, which shows multiple problematic test results: the initial IR measurement for blue-to-earth was below the 400 threshold, and the Hi-Pot test indicates a "dead short" condition. After testing, the measurements confirm the blue phase has a complete short circuit, with IR voltages showing shorts across multiple phase combinations (blue-to-earth, blue-to-white, blue-to-red). The test was conducted using test voltages ranging from 1000V to 15,000V, with test durations of 1 minute, and was performed and signed by John Griffis. These test results align with the related federal contract opportunity's background describing emergency power circuit failures at the Lake Nona VA Medical Center, specifically highlighting the catastrophic failure of the medium voltage circuit DAG-3's B-phase conductor.

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ATTACHMENT B HI-POT TEST SHEET DAG-15.pdf PDF
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PANEL DETAILS

CIRCUIT

DAG -3

CABLE DETAILS

4/0 15KV

CABLE MAKE

DATE

4/11/2025

IR VALUE MEASURMENT

(BEFORE HIPOT)

TEST VOLTAGE DURATION IR VALUE REMARKS

R-E 1000 1 MIN. 11 G OHMS

W-E 1000 1 MIN. 7.2 G OHMS

B-E 1000 1 MIN.

42.1 M OHMS BELOW THE 400 THRESHOLD

R-W 1000 1 MIN.

10.2 G OHMS

W-B 1000 1 MIN. 3.5 G OHMS THIS WOULD BE INDICATIVE OF BLUE BEING DEFECTIVE

B-R 1000 1 MIN.

11 G OHMS

HIPOT TEST TEST VOLTAGE DURATION LEAKAGE CURRENT

(IN mA)

REMARKS

R- PH SHORTING W-B-E 15,000 1 MIN.

2.9 M OHMS

W-PH SHORTING B-R-E 15,000 1 MIN.

2.8 M OHMS

B-PH SHORTING R-W-E 15,000 1 MIN. TRIP DEAD SHORT WHEN TESTED

IR VALUE MEASURMENT

(AFTER HIPOT)

TEST VOLTAGE DURATION IR VOLTAGE REMARKS

R-E 5000 1 MIN. 10,500 M OHMS

W-E 5000 1 MIN. 450 M OHMS

B-E 5000 1 MIN. SHORT BLUE HAS A DEAD SHORT

R-W 5000 1 MIN. 10,500 M OHMS

W-B 5000 1 MIN. SHORT

B-R 5000 1 MIN. SHORT

TESTED BY WITNESSED BY

Sheet1

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