Secondary Surge and Jacketed Cable Investigation

The objectives of this project were to: 1) determine the sensitivity of secondary surges with respect to circuit parameters, and 2) determine the magnitude of neutral-to-ground voltages on jacketed cables with and without counterpoise.

Full-scale impulse tests were conducted on jacketed cable and a parametric study was conducted to investigate secondary surges and currents as a function of transformer construction, triplex length, load variation and secondary arresters all with high resistance primary grounding. Also, a computer-based tutorial on underground distribution overvoltage protection was created.

Overvoltage protection application guidelines from the P1-1 and P1-2 test results were also summarized in a separate document.

Tagged: Equipment Testing/Evaluation, P1, Engineering Guidelines, P2-1, System Protection