Electrical System Overview Hanse Environmental Inc. By Peter Hanse 08/14/2006 Electrical System Overview Learning to Work Efficiently and Accurately

Introduction What is your knowledge of electricity? How Does it Interact with other systems?

Agenda Areas Covered: General Control Electrical Failure Types Maintenance

Overview AGREE Style

Vocabulary Electricity is a property of matter that results from the presence or movement of electric charge.1 Contactor is an electrical device used for controlling power flow. A contactor is activated by a control input which is a lower voltage / current than that which the contactor is switching.2 Relay is an electrical switch that opens and closes under control of another electrical circuit.3 Solid-state relay (SSR) is a solid state electronic component that provides a similar function to an electromechanical relay but does not have any moving components, increasing long-term reliability.4 Relay Ladder Logic is a flow chart scheme where relays and contacts are used to indicate order of operations and processes to be performed.5

Our Electric System Simplicity is Key Relays, Contactors, Timers kept to minimum PLC used only when needed Schematics in relay logic for easy service All wire numbered

High Power System Overview

Relay Logic System Overview

Instrument System Overview

Causes of System Failures Relay Life Exceeded Caused by mechanical actions Device Malfunction Causes include dust, water, humidity, over temperature Wire loose Caused by vibration loosing terminal screws End of Life of Device Devices have known end of life ie JC E-Prom at 7-10 Years

Extending Air System Life Keep Eclectic Compartments Clean and dry. PM Check Up Check Terminal screws Check Current Draws of Heaters Check Instruments operation

Summary Electricity is key to any chambers workings. Diagnostic of problems do not have to take days if they are approached with logic

References 1 Electricity http://en.wikipedia.org/wiki/Electricity 2 Contactor http://en.wikipedia.org/wiki/Contactor 3 Relay http://en.wikipedia.org/wiki/Relay 4 Solid-State Relay 5 Relay Ladder Logic http://en.wikipedia.org/wiki/Relay_Ladder_Logic