1 / 14

Circuit Breaker Components

Circuit Breaker Components . Capacitor Resistors Diodes Switches. Capacitors--Specs . 10KVDC 10uF Small Size Three sources Plastic Capacitors Inc (USA) Hi Volt Corporation (Ireland) High Energy Corporation (USA). Capacitors. Size is a function of Capacitance

ewan
Télécharger la présentation

Circuit Breaker Components

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. Circuit Breaker Components • Capacitor • Resistors • Diodes • Switches

  2. Capacitors--Specs • 10KVDC • 10uF • Small Size • Three sources • Plastic Capacitors Inc (USA) • Hi Volt Corporation (Ireland) • High Energy Corporation (USA)

  3. Capacitors • Size is a function of Capacitance • Smaller capacitance, smaller volume

  4. Possible to use smaller cap? • 10uF gives a spike of 12kV for about 200msec • 1uF gives a spike of 14kV for about 100msec • Is this acceptable? • Try simulations with 5uF

  5. Capacitor Comparison

  6. Cap Comparison (cont) • Tolerances of ±10% • Temperature ranges –55C to 85C • Prices (based on purchase of 100-150 units) • Plastic Caps range from $112 for 1uF to $493 for 10uF • Hi Volt prices at £70 fro 1uF and 4uF

  7. Resistors--specs • 1kΩ resistance • 10 Amps • 10kVDC • 10A*10kV=100kW! • 100kW*1sec=27.77kWh • 27.22kWh/3.6*10^6=7.7*10^-6 Joules

  8. Resistors—what I found • Most resistors very small or very large • Most resistors rated in KW range are very large size and impractical for our purposes • High voltage resistors are rated for low wattage and high energy • Ex. Kanthal Globar 106AS resistor 15kV, 35A, 13W, 1900J

  9. Resistors • Actual resistance value still undecided • Actual ratings not entirely clear, i.e. what power ratings and energy ratings will suffice for this application. • Wait until design is more firm, test resistors in lab

  10. Resistors (cont) • Manufacturers • Kanthal Globar • Resistors designed for short pulses • $43-$73 range per resistor (based on small order) • Sizes from 2”-6” in length • Nicrom Ticino • Power resistors • $55-$75 range • 2”-6” length • Tepro • Will build to our specs, 400mm in length

  11. What we have • Capacitors • No problem • Switches • Will use vacuum switches for now • Looking into GTO • Diodes • Again, no problem

  12. Diodes • Need 10A, 10kV Vrrm • Found 10-20A, 1000-1600Vrrm • Can cascade in series • International Rectifier • Two types • Plastic casing, $1.26-$1.68ea • Metal casing $3.72-$3.84ea • Both about 1.25” in length • Neither immersable in transformer oil

  13. Switches • Possible options • Vacuum switches • Durable, long lasting • Require continuous signal while closed • 3.25” long, 0.65” wide • GTO switches • Turn on signal, turn off signal, but no continuous current

  14. What’s next? • Build a low-voltage prototype • What we have • IGBT switches • Logic switch controller • What we need • Low voltage capacitor, resistors, diodes

More Related