Electrical Short Circuit/Arcing of Aged Aircraft Wiring

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$Atago Co., Ltd. Salinity Refractometer, Model S-10 Instruction Manual$

Figure 29. Test 4: Wire bundle after the test including two circuit breaker resets.Electrical Arcing of Aged Aircraft Wire.Lectromechanical Design CompanyReport No. N191-RPT4AU99 August 12, 199930
Test 6 & 7Wet Arc TrackingBundle: Seven wires (6 over 1) of BMS 42A/8/1-20 specification, 15 inches in length.Electrolyte: Lavatory Waste Water @ 100mg/minuteCircuit Resistance: 1 OhmGenerator: 3 phase, 400Hz, 120 line to neutral (208 line to line), 10 kVA.Length of test: 10 to 16Observation Test 6 Test 7Visible scintillation 00:10 00:25Flash 5:17 7:28Strong Arcing No NoCircuit Breakers Tripped 0 0Damage Length 1/4" 3/8"Number of Wires Failing WetDielectric Test2 of 5[C] & [B2]0 of 5The results in Tests 6 & 7 were similar to those in Tests 1 & 2 but the accumulateddamage was less because the test were not run as long. Visible scintillations began almostimmediately after the start of the test. After several minutes a char path began to develop andsoon after the first flash event was observed. Like the earlier test the single flash events (Figure30) soon turned into a rapid series of flash pop events and chemical combustion flames were alsoobserved.Figure 30. Test 6: Flash event during wet arc track testing with lavatory waste water.Electrical Arcing of Aged Aircraft Wire.Lectromechanical Design CompanyReport No. N191-RPT4AU99 August 12, 199931
Page 3 and 4: Electrical Arcing of Aged Aircraft
Page 5 and 6: were placed between wires in small
Page 7 and 8: BackgroundArc tracking of aircraft
Page 9 and 10: EXPERIMENTAL PROCEDURESWet Arc Trac
Page 11 and 12: Figure 5. Circuit used in the metal
Page 13 and 14: Figure 8. Apparatus used for metal
Page 15 and 16: DESCRIPTION OF ELECTRICAL ACTIVITYT
Page 17 and 18: The voltage and current waveforms w
Page 19 and 20: Figure 15. Example of a strong arci
Page 21 and 22: RESULTSTable 1 lists the Test run g
Page 23 and 24: Table 3. Summary of Metal Shavings
Page 25 and 26: APPENDIX A: Description of Individu
Page 27 and 28: Test 1 & 2Wet Arc TrackingBundle: S
Page 29 and 30: Figure 22. Test 1: Oscillogram show
Page 31 and 32: Test 3Wet Arc TrackingBundle: Seven
Page 33 and 34: Figure 26. Test 3: Sample bundle af
Page 35: Figure 27. Test 4: Strong arcing on
Page 39 and 40: Figure 32. Test 6: Sample bundle af
Page 41 and 42: Test 9:Bundle: Seven wires (6 over
Page 49 and 50: Figure 37. Test 14: Electrical powe
Page 51 and 52: Metal Shavings AbrasionTest 16 A &
Page 53 and 54: Test 17 & 192 Bundles: four wires e
Page 55 and 56: Figure 42. Test 17: Damage to wire
Page 57 and 58: Figure 44. Test 20: Damage done in
Page 59 and 60: Table 7. Description of alternate a

Electrical Short Circuit/Arcing of Aged Aircraft Wiring

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