Pre-Electric Station Operator

Station Design

Concepts

Introduction

• Station design is not arbitrary

• Factors considered are– Cost– Reliability– Flexibility– Redundancy– Location (Physical Space Availability)

THE PURPOSE OF EVERY

STATION DESIGN IS TO

PROVIDE THE CUSTOMER

WITH POWER.

Redundancy

• The INTENTIONAL DUPLICATION of a circuit or equipment.

• Provides for greater Reliability.

• Increases the Flexibility.

• Increases the Cost.

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

Circuit

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

This is a “Double Bus Double Breaker”

Two busses and two breakers per circuitCircuit

breaker

Circuit

Two circuits share the center circuit breaker or half the breaker

This is a “Double Bus Double Breaker and a Half” configuration

Ciruit

Ciruit

Two circuits share this breaker

RING BUS

L1

T1 L2

L3T2

Different Types of Distributing Station

Department Style StationSplit Front Bus StationGas Company StationSectionalized Main Bus StationMetal Clad Station or Ten CB’s

configurationPackaged Type Station

Department StyleStation

Split Front Bus Station

Gas Company Station

Sectionalized Main Bus Station

Metal Clad Station or Ten CB’s Configuration Station

Package Station