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TranSystems Corporation - LGM Construction

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501070099 Federal Express Oakland Sort Expansion Issued for Bid 10/11<br />

3.2 TESTING, ADJUSTING AND CLEANING<br />

A. All installed 15KV circuits shall be fully tested and left in normal operating condition by the<br />

Division 16 contractor.<br />

B. 15KV Cable<br />

1. All 15KV cable installations, including splices and terminations, shall be tested by<br />

a non-destructive dielectric direct current test on the insulation of the cable<br />

system. All tests shall be made by qualified field technicians especially trained for<br />

dielectric testing and interpretation of results and regularly engaged in dielectric<br />

testing and shall be an independent organization having no affiliation with the<br />

construction contractor.<br />

2. The maximum cable dielectric test voltages (direct voltage) shall be in accordance<br />

with the following tabulation:<br />

15KV CABLES<br />

Type Of Cable Being Tested Maximum DC Test Voltage<br />

New cable 55KV<br />

Old cable 20KV<br />

New to new spliced cable 55KV<br />

New to old spliced cable 20KV<br />

3. The test procedure for new cables shall be as follows:<br />

a. Megger Test - to ensure basic cable integrity<br />

b. Step Voltage Tests: In the step voltage tests, voltage shall be applied in<br />

equal consecutive steps, minimum of ten steps. Voltage shall be held for<br />

one minute or longer as required to allow for stabilization of the<br />

capacitance and absorption currents. Current readings shall be taken<br />

and recorded at the end of each period for each voltage step. The<br />

voltage shall not be increased or decreased during the one minute<br />

specified. After the maximum voltage is reached and the initial readings<br />

are recorded, the maximum voltage shall be held for an additional ten<br />

minutes. Current readings shall then be taken and recorded each minute<br />

during this ten minute period.<br />

c. Cable test results:<br />

(1) All readings shall be recorded and plotted on Kilovoltmegohm<br />

paper.<br />

12KV CONDUCTORS 16320-2

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