Leakage Current Detection System for Insulated Boom Trucks

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Leakage Current Detection System for Insulated
Boom Trucks
May01-12

• Team
• Josh Struble (EE)
• Eli Forney (EE)
• Chris Hulsebus (EE)
• Lynn Nguyen (EE)

• Advisors
• Glen Hillesland
• John Lamont
• Robert Weber
• Ralph E. Patterson III

Client Skarshaug Testing Laboratory, Ames IA
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Presentation Outline

• Problem Statement
• Design Objectives
• End-Product Description
• Assumptions and Limitations
• Project Risks and Concerns
• Technical Approach
• Evaluation of Project Success
• Recommendations for Further Work
• Human and Financial Budgets
• Lessons Learned
• Closing Summary
• Questions

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Problem Statement

• To design a system
  for testing the insulation integrity of boom
  trucks to assure workmen they are insulated from
  ground when working from the bucket.

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What you dont want to happen!!
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Design Objectives

• To View Current Remotely
• Use Existing Current Sensing System and
  Techniques
• Process Current Using State of the Art Components
• Produce Read Out on Hand Held LED
• Eliminate Pull Cord
• Low Battery Detection

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End-Product Description

• Simple attachment to present device
• Battery operated Transmitter and Receiver with a
  range of 150 Ft
• Handheld Receiver with LED display

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Assumptions and Limitations

• Assumptions
• The leakage current will not exceed 2000 micro
  amps
• The boom truck will only be in contact with one
  line at a time
• The kV value and allowable current for the line
  is known
• The appropriate safety procedures are followed

• Limitations
• The current will range from 0 to 2000 micro amps
• The receiver will be within 150 ft of the boom
  truck
• Will only work in fair weather conditions
• The duty cycle is limited to the battery life

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Risks and Concerns

• Limited amount of time for project completion.
• Testing to insure accuracy.
• Interference
• Ease of use

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Technical Approach - Transmitter
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Technical Approach - Receiver
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Evaluation of Project Success

• Interface with present unit.
• Data input to programmable unit
• RF Transmission/Reception
• Receiver display interface

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Further Work

• Adding a speaker or light system
• Resizing the probe assembly to make it smaller.
• Design a stationary mounting point for the
  receiver on the truck.
• Find lower cost devices for mass production.

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Financial Budget
Total Cost 260.00
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Human Budget
Total Hours 214 Hours
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What We Have Learned

• Meet with team members and advisors regularly
• Review parts to be ordered carefully
• Keep group members involved
• Basic Stamp Technology
• RF Communications
• Testing procedures for Boom Trucks

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Summary and Questions???

• Our wireless detection system will make it easier
  and safer for linemen to determine the insulation
  integrity of a
• boom truck to insure their safety.