1 / 20

BEX100 – Basic Electricity

BEX100 – Basic Electricity. Relays (Magnetic Switches). Objectives. Know the definition of a relay Understand relay operating principles Properly test relay operation. Relay Principles. A relay may also be called an “electromagnetic switch”

arnon
Download Presentation

BEX100 – Basic Electricity

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. BEX100 – Basic Electricity Relays (Magnetic Switches)

  2. Objectives • Know the definition of a relay • Understand relay operating principles • Properly test relay operation

  3. Relay Principles • A relay may also be called an “electromagnetic switch” • Relays use a “low amperage circuit” to control a “high amperage circuit” • The low amperage circuit controls an electromagnetic device • The electromagnetic device “closes/opens” the high amperage circuit

  4. Relay Operation

  5. Typical 4 Pin Relay“ISO RELAY”

  6. Typical 5 Pin Relay“ISO RELAY”

  7. Typical 5 Pin RelayPin Identification HALF ISO

  8. Relay Applications

  9. Relay Applications

  10. Relay Applications

  11. Relay Applications

  12. Testing Relay Operation Relays can be tested using: • A test light • A continuity light • A DVOM • A jumper wire

  13. Testing Procedures

  14. Testing Procedures

  15. RELAY DIAGNOSIS • SHOULD HAVE POWER ON TWO CONNECTIONS IN KEY ON; DEVICE OFF POSITION (ISO TERMINALS 30 AND 85 OR 86) • RELAYS ARE MOST ALWAYS ACTIVATED WITH GROUND • LISTEN FOR CLICK WHEN ACTIVATED= BETTER YET CHECK OUTPUT VOLTAGE ( ISO PIN 87)

  16. WHEN ALL ELSE FAILS... • EXCHANGE SUSPECT RELAY WITH ANOTHER RELAY OF THE SAME NUMBER IN THE RELAY CENTER

  17. LET’S REVIEW... • WHY ARE RELAYS CALLED MAGNETIC SWITCHES? • HOW MUCH CURRENT DOES THE CONTROL CIRCUIT USE? • HOW MUCH CURRENT DOES THE LOAD CIRCUIT USE? • NAME SOME ADVANTAGES OF USING RELAYS?

  18. LET’S REVIEW….. • WHAT IS AN “ISO” RELAY? • WHAT IS A HALF “ISO” RELAY? • HOW CAN RELAYS BE TESTED? • WHAT RESISTANCE SHOULD THE RELAY COIL READ? • WHAT SHOULD THE “NC” CONTACTS OF A RELAY READ? • WHAT SHOULD THE “NO” CONTACTS OF A RELAY READ?

  19. THANK YOU;THANK YOU VERY MUCH!! RELIABLE RELAY REPAIR “DON’T CUSS, CALL US!!!

  20. Elizabethtown Technical CollegeBEX100 – Basic Electricity

More Related