J--*Small Business Set-Aside* LIM Panel Maintenance at Pittsburgh VA Healthcare System

The Contractor shall perform the following tests on each LIM panel: 2.1 Measure and record system voltage line-to-line and line-to-ground. 2.2 Unplug all electrical equipment plugged into the isolated power system and switch off all permanently installed electrical equipment connected to isolated power. 2.3 With all circuits energized, all electrical equipment unplugged, and all permanently wired equipment turned off, measure leakage current and calculate the system impedance. 2.4 Using an ac microammeter measure current between l1 and ground, and l2 and ground. 2.5 Measure the voltage between l1 and l2. 2.6 Calculate impedance based on system voltage and l1 and l2 to ground leakage current. Verify the impedance is >200,000 ohms. 2.7 Conduct a test of the ground system associated with each isolated power system and ground integrity of the receptacle’s ground. This shall be determined by measuring the voltage difference between the room or patient reference ground and the ground point of the receptacle being tested when a constant current is forced to flow between these points. The calculated resistance shall be below 0.2 ohms. 2.8 Plug in and reenergize all equipment.

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Electrical.