View Latest Blog Entries
Testing & Assessment Certification Aging Wires & Systems Management Standard & Regulation Conference & Report Maintenance & Sustainment Research Protection & Prevention Arcing Miscellaneous
Popular Tags
Visual Inspection MIL-HDBK MIL-HDBK-525 FAR AS50881 FAR 25.1707 Electromagnetic Interference (EMI) High Voltage Wire System Arcing Damage FAR 25.1709 Degradation
All Tags in Alphabetical Order
25.1701 25.1703 Accelerated Aging ADMT Aging Systems Aircraft Power System Aircraft Service Life Extension Program (SLEP) arc damage Arc Fault (AF) Arc Fault Circuit Breaker (AFCB) Arc Track Resistance Arcing Arcing Damage AS22759/87 AS4373 AS4373 Method 704 AS50881 AS5692 AS6019 AS85485 AS85485 Wire Standard ASTM F2799 ATSRAC Attenuation Automated Wire Testing System (AWTS) Bent Pin Analysis Best of Lectromec Best Practice Cable cable testing Carbon Nanotube (CNT) Certification Chafing Chemical Testing Circuit Breaker Circuit Protection Coaxial cable cold bend comparative analysis Compliance Component Selection Condition Based Maintenance Conductor conduit Connector connectors contacts Corona Corrosion Corrosion Preventing Compound (CPC) Cracking D-sub data analysis data cables degradat Degradation Delamination Derating dielectric constant Distributed Power System DO-160 Electrical Aircraft Electrical Component Electrical Testing Electromagnetic Interference (EMI) Electromagnetic Vulnerability (EMV) EMC EMF EN3197 EN3475 EN6059 End of Service Life End of Year Energy Storage engines Environmental Environmental Cycling ethernet EWIS Component EWIS Design EWIS Failure EWIS Thermal Management EZAP FAA AC 25.27 FAA AC 25.981-1C Failure Database Failure Modes and Effects Analysis (FMEA) FAQs FAR FAR 25.1703 FAR 25.1707 FAR 25.1709 fault tree Fixturing Flammability fleet reliability Flex Testing fluid exposure Forced Hydrolysis fuel system fuel tank ignition functional testing Fundamental Articles Future Tech Green Taxiing Grounding Harness Design Hazard Analysis health monitoring heat shrink tubing high current high Frequency high speed data cable High Voltage History Hot Stamping Humidity Variation ICAs IEC60172 Instructions for Continued Airworthiness Insulation insulation resistance IPC-D-620 ISO 17025 Certified Lab Kapton Laser Marking life limited parts life projection Maintenance Maintenance costs Mandrel Mechanical Testing MECSIP MIL-C-38999 MIL-C-85485 MIL-DTL-17 MIL-DTL-3885G MIL-DTL-38999 MIL-E-25499 MIL-HDBK MIL-HDBK-1646 MIL-HDBK-217 MIL-HDBK-454 MIL-HDBK-516 MIL-HDBK-522 MIL-HDBK-525 MIL-HDBK-683 MIL-STD-1560 MIL-STD-1798 MIL-STD-464 MIL-T-7928 MIL-T-81490 MIL-W-22759/87 MIL-W-5088 Military 5088 modeling MS3320 NASA NEMA27500 No Fault Found off gassing Outgassing Overheating of Wire Harness Parallel Arcing part selection Performance physical hazard assessment Physical Testing polyimdie Polyimide-PTFE Power over Ethernet Power systems predictive maintenance Presentation Probability of Failure Product Quality Radiation Red Plague Corrosion Reduction of Hazardous Substances (RoHS) regulations relays Reliability Research Rewiring Project Risk Assessment SAE Secondary Harness Protection Separation Requirements Series Arcing Service Life Extension Severe Wind and Moisture-Prone (SWAMP) Severity of Failure Shield Shielding signal cable silver plated wire smoke Solid State Circuit Breaker Space Certified Wires stored energy supportability Sustainment Temperature Rating Temperature Variation Test methods Test Pricing Testing Thermal Circuit Breaker Thermal Endurance Thermal Index Thermal Shock Thermal Testing Tin plated conductors Troubleshooting TWA800 UAVs verification Visual Inspection white paper whitelisting Wire Ampacity Wire Certification Wire Comparison wire failure wire properties Wire System wire testing Wire Verification work unit code

Arc Damage Modeling Tool

Summary of Arc Damage Modeling Tool

  • Based on over 3,000 arc damage assessment tests, the Arc Damage Modeling Tool (ADMT) is the state-of-the-art for wire failure damage assessment
  • The ADMT is capable of predicting the damage to both direct electrical arcing (direct contact) and indirect arcing (damage from the arc plume)
  • Data generated can be used for EWIS certification to requirements such as 25.1707 and 25.1709

Introduction to the Lectromec Arc Damage Modeling Tool

The Arc Damage Modeling Tool (ADMT), developed in 2006 by Lectromec in coordination with the Federal Aviation Administration (FAA) Technical Center, simulates electrical arcing event damage. For mission or safety critical systems utilizing high density power routing (either large wire bundles or high amperage), an electrical arcing failure can create unsafe operating conditions.

This tool, developed based on quantifying the energy released in the arc, can predict the level of damage depending on circuit and material parameters. While electrical arcing and the subsequent damage have been a concern to the aviation industry for many years, this tool is the first attempt to develop a software tool that can model the damage and provide predictive analysis.

ADMT Focus

The ADMT program was designed to achieve five main goals:

  • Provide a fundamental understanding of how damage occurs by quantifying the energy in the arc
  • Supplement and extend test data throughout the range of test parameters
  • Provide insight into how variation in test parameters will affect levels of damage
  • Show how mitigation techniques such as protective sleeving or increased separation distance will affect arcing damage
  • Use the results of the project to provide data and certification, in particular for FAR 25.1709 requirements compliance

The ADMT is built upon many months of testing performed both by Lectromec and the FAA Tech Center. These tests were performed on a wide range of parameters that included varying power sources and voltages (including 270VDC) and different circuit/bundle protection schemes. The variation in test configurations provides a wide range of underlying information that ADMT assessment supports. The complex nature of arcing events results in non-linear responses to simple changes such as available current, separation distances, and various aerospace materials.

The ADMT has been integrated into the larger Electrical Wire Interconnection Systems Risk Assessment Tool (EWIS RAT™) and will provide more robust damage analysis capabilities to the extensive risk assessment technologies pioneered by Lectromec in the EWIS RAT™.

Case Study

During work on an aircraft OEM, the ADMT was identified by the customer as a necessary part of their aircraft certification package. In addition to the physical testing, the ADMT would support (or reject) the lab results and provide greater confidence in the safe separation distances used by the OEM engineers when designing the aircraft’s EWIS.

The lab data was then taken and inputted into the ADMT. The simulation parameters evolved to best match the available test data until a close match was found with the simulation and available test data. Since the ADMT is able to provide a much higher resolution of information about the objects under tests, it was then possible to determine the maximum temperature for the components.

Many of the tests results and safe separation distances were confirmed with the ADMT. However, several cases were identified that questioned the separation distance (i.e. too high a maximum temperature). Additional ADMT work also identified the likely worst case scenario (using assumptions based on Lectromec’s knowledge and experience with wire failure) and the impacts on nearby systems. This resulted in increasing the separation distance for the identified areas and performing additional testing to confirm the results.

Further Reading

Additional documents and articles about the ADMT and application can be found below