Industrial and commercial facilities face increasing demands to own and operate their own primary substation transformers rather than obtaining secondary power from utility furnished transformers. Numerous options exist for selecting primary protection on these transformers. Fuses, circuit breakers, and relays can all be applied to provide transformer primary protection from over-current and short circuit currents. This presentation will examine the use of relays to provide through fault protection on the primaries of Category I, II, and III liquid immersed transformers. The application of relays in coordination with circuit breakers will be reviewed. Instantaneous and time over current (50/51), ground fault (50/51N/G), and differential (87) relays will be highlighted. The discussion will include a brief review of transformer through fault protection curves and the contents of the IEEE Red and Buff Books.
Education: BSEE Drexel Institute of Technology
Present Position: ABB, Application Engineering Manager
Clifford Downs is the Application Engineering Manager for Distribution Relays for the ABB Substation Automation and Protection Division in Allentown PA. He is a member of the Power System Relaying Committee of the IEEE Power Engineering Society. He has over 25 years experience in the design and application of solid-state protective relays for medium and low voltage power systems. Cliff has a BSEE from Drexel Institute of Technology in Philadelphia.
| Location | Time | ||
|---|---|---|---|
| Costa's (Greektown) | 5:30 PM | Social | |
| 340 South Halsted Street | 6:00 PM | Dinner | |
| (near Halsted & Van Buren) | 7:00 PM | Presentation | |
| Chicago, IL 60661 | 8:00 PM | Adjourn | |
| 312-263-9700 |
Your cost includes the presentation and a four-course dinner featuring a roast lamb & grilled chicken combination platter. Cost is $25 IEEE Member and $30 non-member. Valet parking is included with your meal.
Please call the IEEE Business Office at (800) 898-IEEE or (630) 724-0200 with your entree preference on or before April 10.