1 / 12

Switches and Circuit Protectors

Switches and Circuit Protectors. Switch – a device that allows you to “make” or “break” the connection between two or more points in a circuit. Poles and Throws. Pole – the moving contact Throw – the non-moving contact. Example : Double-Pole, Single-Throw (DPST).

payton
Download Presentation

Switches and Circuit Protectors

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. Switches and Circuit Protectors Switch – a device that allows you to “make” or “break” the connection between two or more points in a circuit EGR 101

  2. Poles and Throws • Pole – the moving contact • Throw – the non-moving contact Example: Double-Pole, Single-Throw (DPST) EGR 101

  3. Normally Open and Normally Closed Switches EGR 101

  4. Rotary Switches EGR 101

  5. Dual-in-line-Package (DIP) Switches 8 SPST DIP Switch Circuit Symbol EGR 101

  6. Fuses Fuse – a device that is designed to open automatically if its current exceeds a specified value Actual glass fuse Circuit Symbol EGR 101

  7. Fuse Ratings • Current: the maximum allowable fuse current before it blows • Voltage: the voltage across an open fuse that will cause the air in the use to ionize and allow the open fuse to conduct. Fuse ratings are engraved on the metal end caps EGR 101

  8. Types of Fuses • High-Speed • Fast-Blow • Instantaneous • Normal Instantaneous • Time Delay • Slow-Blow EGR 101

  9. Precautions When Replacing Fuses • Make sure all power is removed from the circuit • Only replace with a fuse of the same current rating • Only replace with a fuse of the same or higher voltage rating • Never replace with a fuse with a higher current rating EGR 101

  10. Micro FusesandIntegrated Circuit Protectors EGR 101

  11. Circuit Breakers Circuit Breakers – not destroyed like fuses when activated Single – Pole Double - Pole EGR 101

  12. GFI (Ground Fault Interrupt)GFCI (Ground Fault Circuit Interrupt) • Ground Fault Interrupter (GFI) – common special-case circuit breaker RESET Button EGR 101

More Related