| ??? 11/09/06 13:07 Modified: 11/09/06 13:09 Read: times |
#127639 - I disagree Responding to: ???'s previous message |
However, most damage is caused by close lightning strikes. Becuase of the large electromagnetic pulse, anything conductive acts like a turn in a transformer. Therefore, you need to protect incoming wires with a variety of strategies depending on the signal and the anticipated severity.Sheilded cables with the shield terminated to earth at both ends is a start.
If you terminate the shield at both ends you get "a turn in a transformer" between the two 'ends' this will cause a gigantic ground jolt. Tie the shield at ONE end and have a ground connector inside the shield. The two issues in protection is a) get everything to ground and b) keep the ground from jumping Erik |
| Topic | Author | Date |
| Lightning protection | 01/01/70 00:00 | |
| there is much to this | 01/01/70 00:00 | |
| Lightning protection | 01/01/70 00:00 | |
| so doesa EMI | 01/01/70 00:00 | |
| Mr. Faraday knew how... | 01/01/70 00:00 | |
| THICK metal | 01/01/70 00:00 | |
| Direct Hits | 01/01/70 00:00 | |
| Keep it out of the encosure! | 01/01/70 00:00 | |
| My pplication | 01/01/70 00:00 | |
Details? | 01/01/70 00:00 | |
| I disagree | 01/01/70 00:00 | |
| No, no... | 01/01/70 00:00 | |
| Disconnecting the shield at one end of the cables | 01/01/70 00:00 | |
| a) and b) | 01/01/70 00:00 | |
| Yes, crossed opinions... | 01/01/70 00:00 | |
| and the twain shall never meet | 01/01/70 00:00 | |
| the Shield | 01/01/70 00:00 | |
| The RS485 signal lines is galvanically........... | 01/01/70 00:00 | |
| GND of RS485 bus, PROFIBUS | 01/01/70 00:00 | |
| If you get this close | 01/01/70 00:00 |