1. Pre-Electric Station Operator Station Design Concepts

2. Introduction Station design is not arbitrary Factors considered are –Cost –Reliability –Flexibility –Redundancy –Location (Physical Space Availability)

3. THE PURPOSE OF EVERY STATION DESIGN IS TO PROVIDE THE CUSTOMER WITH POWER.

4. Redundancy The INTENTIONAL DUPLICATION of a circuit or equipment. Provides for greater Reliability. Increases the Flexibility. Increases the Cost.

5. This is a “Single Bus Single Breaker” configuration. We are looking at the number Busses and the number of circuits associated with each circuit breaker Circuit

6. This is a “Double Bus Single Breaker” configuration Two busses and single circuit per circuit breaker Bus Circuits Notice that this configuration has a “Bus Tie” it’s used to connect the two busses

7. This is a “Double Bus Double Breaker” Two busses and two breakers per circuit Circuit breaker Circuit

8. Two circuits share the center circuit breaker or half the breaker This is a “Double Bus Double Breaker and a Half” configuration Ciruit Two circuits share this breaker

9. RING BUS L1 T1L2 L3 T2

10. Different Types of Distributing Station  Department Style Station  Split Front Bus Station  Gas Company Station  Sectionalized Main Bus Station  Metal Clad Station or Ten CB’s configuration  Packaged Type Station

11. Department Style Station

12. Split Front Bus Station

13. Gas Company Station

14. Sectionalized Main Bus Station

15. Metal Clad Station or Ten CB’s Configuration Station

16. Package Station