View Latest Blog Entries
Testing & Assessment Certification Standard & Regulation Aging Wires & Systems Maintenance & Sustainment Management Conference & Report Protection & Prevention Research Miscellaneous Arcing
Popular Tags
Visual Inspection High Voltage AS50881 MIL-HDBK MIL-HDBK-525 FAR AS4373 Maintenance Electromagnetic Interference (EMI) FAR 25.1707 Wire System Arcing Damage
All Tags in Alphabetical Order
2021 25.1701 25.1703 abrasion AC 33.4-3 AC 43 Accelerated Aging accessibility ADMT Aging Systems AIR6808 AIR7502 Aircraft Power System aircraft safety Aircraft Service Life Extension Program (SLEP) altitude arc damage Arc Damage Modeling Tool Arc Fault (AF) Arc Fault Circuit Breaker (AFCB) Arc Track Resistance Arcing Arcing Damage AS22759 AS22759/87 AS23053 AS29606 AS4373 AS4373 Method 704 AS50881 AS5692 AS6019 AS6324 AS81824 AS83519 AS85049 AS85485 AS85485 Wire Standard ASTM B355 ASTM B470 ASTM D150 ASTM D2671 ASTM D8355 ASTM D876 ASTM F2639 ASTM F2696 ASTM F2799 ASTM F3230 ASTM F3309 ATSRAC Attenuation Automated Wire Testing System (AWTS) Automotive Avionics backshell batteries bend radius Bent Pin Analysis Best of Lectromec Best Practice bonding Cable Cable Bend cable testing Carbon Nanotube (CNT) Certification cfr 25.1717 Chafing Chemical Testing Circuit Breaker circuit design Circuit Protection cleaning clearance Coaxial cable cold bend collision comparative analysis Compliance Component Selection Condition Based Maintenance Conductor Conductor Testing conductors conduit Connector Connector rating connector selection connector testing connectors contacts Corona Corrosion Corrosion Preventing Compound (CPC) corrosion prevention Cracking creepage D-sub data analysis data cables degradat Degradation Delamination Derating design safety development diagnostic Dielectric breakdown dielectric constant Dimensional Life disinfectant Distributed Power System DO-160 dry arc dynamic cut through E-CFR electric aircraft Electrical Aircraft Electrical Component Electrical Power Electrical Testing Electrified Vehicles Electromagnetic Interference (EMI) Electromagnetic Vulnerability (EMV) Electrostatic Discharge EMC EMF EN2235 EN3197 EN3475 EN6059 End of Service Life End of Year Energy Storage engines Environmental Environmental Cycling environmental stress ethernet eVTOL EWIS certification EWIS Component EWIS Design EWIS Failure EWIS sustainment EWIS Thermal Management EZAP FAA FAA AC 25.27 FAA AC 25.981-1C FAA Meeting failure conditions Failure Database Failure Modes and Effects Analysis (FMEA) FAQs FAR FAR 25.1703 FAR 25.1707 FAR 25.1709 Fault fault tree Fixturing Flammability fleet reliability Flex Testing fluid exposure Fluid Immersion Forced Hydrolysis fuel system fuel tank ignition Functional Hazard Assessment functional testing Fundamental Articles Fuse Future Tech galvanic corrosion Glycol Gold Gold plating Green Taxiing Grounding hand sanitizer handbook Harness Design harness protection hazard Hazard Analysis health monitoring heat shrink heat shrink tubing high current high Frequency high speed data cable High Voltage High Voltage Degradation HIRF History Hot Stamping Humidity Variation HV connector HV system ICAs IEC 60851 IEC60172 IEEE immersion insertion loss Inspection installation installation safety Instructions for Continued Airworthiness insulating material insulating tape Insulation insulation breakdown insulation resistance insulation testing interchangeability IPC-D-620 ISO 17025 Certified Lab ISO 9000 J1673 Kapton Laser Marking life limit life limited parts Life prediction life projection Lightning lightning protection liquid nitrogen lithium battery lunar Magnet wire maintainability Maintenance Maintenance costs Mandrel mean free path measurement mechanical stress Mechanical Testing MECSIP MIL-C-38999 MIL-C-85485 MIL-DTL-17 MIL-DTL-23053E 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-1353 MIL-STD-1560 MIL-STD-1798 MIL-STD-464 MIL-T-7928 MIL-T-7928/5 MIL-T-81490 MIL-W-22759/87 MIL-W-5088 MIL–STD–5088 Military 5088 modeling moon MS3320 NASA NEMA27500 Nickel nickel plating No Fault Found OEM off gassing Outgassing Over current Overheating of Wire Harness Parallel Arcing part selection Partial Discharge partial discharge at altitude Performance physical hazard assessment Physical Testing polyamide polyimdie Polyimide-PTFE Power over Ethernet power system Power systems predictive maintenance Presentation Preventative Maintenance Program Probability of Failure Product Quality PTFE pull through Radiation Red Plague Corrosion Reduction of Hazardous Substances (RoHS) regulations relays Reliability Research Resistance Revision C Rewiring Project Risk Assessment S&T Meeting SAE SAE Committee Sanitizing Fluids Secondary Harness Protection separation Separation Requirements Series Arcing Service Life Extension Severe Wind and Moisture-Prone (SWAMP) Severity of Failure shelf life Shield Shielding Shrinkage signal signal cable Silver silver plated wire silver-plating skin depth skin effect Small aircraft smoke Solid State Circuit Breaker Space Certified Wires Splice standards Storage stored energy superconductor supportability Sustainment System Voltage Temperature Rating Temperature Variation Test methods Test Pricing Testing testing standard Thermal Circuit Breaker Thermal Endurance Thermal Index Thermal Runaway Thermal Shock Thermal Testing tin Tin plated conductors tin plating tin solder tin whiskering tin whiskers top 5 Transient Troubleshooting TWA800 UAVs UL94 USAF validation verification video Visual Inspection voltage voltage differential Voltage Tolerance volume resistivity vw-1 wet arc white paper whitelisting Winding wire Wire Ampacity Wire Bend Wire Certification Wire Comparison wire damage wire failure wire performance wire properties Wire System wire testing Wire Verification wiring components 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