Contactor Generalizations

By Mike O’Dell 10/16/2011 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Contactor & Relay Issues

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Customer Complaints and Field Failures – in Order of Commonality

[object Object],[object Object],[object Object],[object Object],Burned Contacts Severity of Failure ,[object Object],[object Object],[object Object],Field Failures Causes:

[object Object],[object Object],[object Object],[object Object],Burned Coils Severity of Failure ,[object Object],[object Object],[object Object],Field Failures Causes:

[object Object],[object Object],[object Object],[object Object],Open Coils Severity of Failure ,[object Object],[object Object],[object Object],[object Object],Field Failures Causes:

[object Object],[object Object],[object Object],[object Object],Stripped Screws – Customer Connections Severity of Failure ,[object Object],[object Object],Field Failures Causes:

[object Object],[object Object],[object Object],[object Object],[object Object],Silver Contacts High Cost Components and Processes in Contractors and Relays

[object Object],[object Object],[object Object],[object Object],[object Object],Coils High Cost Components and Processes in Contractors and Relays

[object Object],[object Object],[object Object],High Cost Components and Processes in Contractors and Relays Contactor / Relay Magnets

[object Object],[object Object],High Cost Components and Processes in Contractors and Relays Contactor / Relay Magnets

[object Object],[object Object],High Cost Components and Processes in Contractors and Relays Plastic

[object Object],Springs Labor cost to assemble High Cost Components and Processes in Contractors and Relays Contact Carrier

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Desire Design Changes to Reduce Cost and Maintain or Increase Reliability

Contactor Cutaway L1 L2 T1 T2 LINE LOAD CONTROL CIRCUIT

[object Object],[object Object],Alternate Solutions Currently Available-list Advantages

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Customer & Design Requirements Which May Limit Design Improvements

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Agency Standards

ARMATURE MAGNET A SMALL GAP IS LEFT TO BREAK THE MAGNETIC FIELD AND ALLOW ARMATURE TO DROP AWAY FREELY AFTER COIL IS DE-ENERGIZED SHADING COIL Magnetic Flux in Contactor Magnets

Magnetic Flux in Contactor Magnets

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],AC Contactor Coils - Terms

[object Object],[object Object],[object Object],AC Contactor Coils - Issues

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Magnet Wire Coil Design – Magnetic Wire

[object Object],[object Object],[object Object],[object Object],Coil Design

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Coil Design

[object Object],[object Object],[object Object],[object Object],[object Object],DC Coil Design

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Design Methods – DC Coils

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Controlling Arcing

AC arc suppression ,[object Object],[object Object],[object Object],[object Object],[object Object],AC Contacts

DC arc suppression ,[object Object],[object Object],[object Object],[object Object],[object Object],DC Contacts

Contactor Generalizations

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