Program 1

Project 1 - URD Overvoltage Protection

Using full-scale impulse tests on buried URD cable, classical underground distribution system overvoltage protection theory was validated. Included were comparisons of SiC and ZnO arrester performance, comparisons of arrester placement, and mid-span voltage magnification due to taps.

Read More →

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

Project 2 - URD Overvoltages Considering Transformers and Grounding

Using full-scale impulse tests, impulse overvoltages on URD systems were investigated considering: transformer characteristics and secondary currents due to a poorly grounded primary neutral. Also, a computer-based tutorial on underground distribution overvoltage protection was created.

Read More →

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

Project 3 - Fast and Slow-Front Surges

Using full-scale impulse tests, cable system overvoltages due to fast and slow-front surges were investigated. Guidelines for mitigation of lead-length voltage effects were developed.

Read More →

Tagged: P3-1, P1, Equipment Testing/Evaluation, System Protection, Engineering Guidelines