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Intelligent Surge Protection Device EEL 4906 Engineering Design I and Professional Issues

Intelligent Surge Protection Device EEL 4906 Engineering Design I and Professional Issues. Team Members: Advisor : Cruz, Jaime e. Dr. Paris Wiley Dobbs , Michael Instructor: Guzman, Frank Selcuk Köse Ogundere , Adebowale corporate partner: Wallace, Richard .

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Intelligent Surge Protection Device EEL 4906 Engineering Design I and Professional Issues

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  1. Intelligent Surge Protection DeviceEEL 4906 Engineering Design I and Professional Issues Team Members: Advisor: Cruz, Jaime e. Dr. Paris Wiley Dobbs, Michael Instructor: Guzman, Frank SelcukKöseOgundere, Adebowalecorporate partner: Wallace, Richard Jaunary 26th 2015

  2. Introduction • SPD’s are electrical devices typically installed in power distribution panels, process control systems, communications systems, and other heavy-duty industrial systems, for the purpose of protecting against electrical surges and spikes, including those caused by lightning.  • However, none of the SPD’s in the market allow for remote monitoring of the key components, and they are limited to certain electrical characteristics.

  3. Our Design Concept • Intelligent Surge Protection Device • Remote monitoring/reporting • User friendly interface (PC software) • Improve electrical characteristics of SPD • Fuses • Metal-Oxide Varistors (MOV’s) • Conducting wires • Avalanche diodes • Sensing circuit to measure the degradation of the unit as a whole. • Improve the external design (housing)

  4. SPD FUNCTIONAL DIAGRAM

  5. Areas of Research • Overvoltage sensing circuit • Develop a circuit • Use an existing patent available to the public • Use existing proprietary sensing circuit and treat it as a black box

  6. Areas of Research MOV’s and Silicon Avalanche Diodes Metal Oxide Varistor (MOV): Highest energy capability Excellent reliability Consistent performance Better mechanical connectivity for paralleling multiple components. Non-liner clamping curve gradually degrades over repeated use (only at high surge levels), moderate capacitance. Silicon Avalanche Diode(SAD): Flatter clamping curve Excellent reliability Consistent performance Very low energy capability Expensive. Varistor IV Curve Avalanche Diode IV Curve Transient Voltage Suppressor Diodes

  7. Areas of Research Silicon Avalanche Surge Suppressor SASD uses a silicon based diode, similar to a Zener Diode. SASD response times are faster: 1 ps to 10 ps, compared to 1 ns to 10 ns for MOVs. They have a sharper bend in the curve around the breakdown voltage; As a result, they can clamp closer to the normal peak voltage

  8. MODES OF PROTECTION - LINE CONNECTION L1 L2 L3 Neutral Ground 7 Modes of Protection Avalanche Diodes will be added in a way to assist the reaction time of each Varistor (MOV)

  9. Simplified Safe/Fail Circuit Diagram MOV MOV MOV Small Magnet Attached to MOV’s fail Indicator Hall Effect Sensor US1881 Output = High/Low Micro Controller Info. via Wireless Comm. Info. Received at User PC

  10. Implementation of the Hall Effect Circuit Hall Effect Senor Attached Here Magnet will be Attached Here

  11. Areas of Research • Arduino UNO Microprocessor • Process the information coming from the various sensors in the device. • Conveys the information to the Wi-Fi module. • Process incoming requests from remote users. • Two-way user interface software • Auto-reporting capabilities defined by the user • User will be able to monitor the status of the SPD’s in real time. • Tools available to create GUI: • QT Project

  12. Areas of Research • Wireless Transmission • Existing Wi-Fi network is required. • IEEE 802.11 a/b/g/n • HF-A11 modules use UART interface which include 4 general signals: TXD/RXD/RTS/CTS • Add RS-232 chipset to convert the signal to RS-232 voltage to communicate with the device (sensors). • Sleep mode capability while maintaining association with the access point.

  13. Areas of Research: Housing Redesign Current Proposed Tools Available: SolidWorks is solid modeling CAD (computer-aided design) software. 3D Printing

  14. UPGRADES TO THE SPD

  15. PRODUCT SPECIFICATIONS

  16. Technical Risks • Transient Sensing Circuitry • Setting the threshold voltage for detection • MOV and Avalanche Diodes Performance • Not switching fast enough could damage Diodes • Failed MOV/Diode Detection Circuitry • False indication could leave the user unprotected • Hall effect sensor performance in high current environment • Wireless transmission • Location may not have access to a Wi-Fi spot or weak signal

  17. Tentative Timeline

  18. QUESTIONS? Visit our website http://smartsurgeprotector.wordpress.com/ Contact any of us Cruz, Jaime jcruz15@mail.usf.edu Dobbs, Michael mdobbs@mail.usf.edu Guzman, Frank fguzman@mail.usf.edu Ogundere, Adebowaleaoo@mail.usf.edu Wallace, Richard rbwallace@mail.usf.edu

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