Fig. 1. Time domain diagram of HEMP
Fig. 2. Schematic diagram of HEMP incident electric field and EWIS cable coupling
Fig. 3. Waveform of HEMP excitation signal source
Fig. 4. Schematic diagram of simulation model
Fig. 5. Schematic diagram of test site
Fig. 6. Simulated coupling current of Cable 1
Fig. 7. Simulated coupling current of Cable 2
Fig. 8. Simulated coupling current of Cable 3
Fig. 9. Measured coupling current of Cable 1 in test
Fig. 10. Measured coupling current of Cable 2 in test
Fig. 11. Measured coupling current of Cable 3 in test
Fig. 12. Simulation result, the height above the ground is 200 mm
Fig. 13. Simulation result, the height above the ground is 500 mm
Fig. 14. Test result, the height above the ground is 200 mm
Fig. 15. Test result, the height above the ground is 500 mm
cable type | maximum coupling current when placed
horizontally (simulation results)/mA
| maximum coupling current when placed
horizontally test results)/mA
| cable1 | 9.86×103 | 5.12×103 | cable2 | 172.6 | 128.9 | cable3 | 39.3 | 20 |
|
Table 1. Comparison of maximum coupling current of different cable types
ground clearance/mm | maximum coupling current when placed
horizontally (simulation results)/mA
| maximum coupling current when placed
horizontally (test results)/mA
| 100 | 9.86 | 5.12 | 200 | 12.72 | 8.08 | 500 | 12.89 | 13.40 |
|
Table 2. Comparison of maximum coupling current of different height above the ground