VAMP 24h support phone +358 (0)20 753 3264
8.2. Auxiliary voltage ............................................................ 186
8.3. Serial communication connectors ............................. 186
8.3.1. Front panel connector ......................................... 186
8.3.2. Rear panel connector X5 (REMOTE) .................. 187
8.3.3. X4 rear panel connector (local RS232 and
extension RS485 ports) ..................................................... 192
8.4. Optional two channel arc protection card.............. 192
8.5. Optional digital I/O card (DI19/DI20) ......................... 193
8.6. External I/O extension modules .................................. 194
8.6.1. External LED module VAM 16D ........................... 194
8.6.2. External input / output module .......................... 194
8.7. Block diagrams .............................................................. 200
8.8. Block diagrams of option modules ............................ 201
8.8.1. Optional arc protection ...................................... 201
8.8.2. Optional DI19/DI20 ............................................... 201
8.9. Connection examples .................................................. 202
9. Technical data ................................................................... 203
9.1. Connections................................................................... 203
9.1.1. Measuring circuitry ............................................... 203
9.1.2. Auxiliary voltage ................................................... 203
9.1.3. Digital inputs .......................................................... 204
9.1.4. Trip contacts .......................................................... 204
9.1.5. Alarm contacts ..................................................... 204
9.1.6. Local serial communication port ....................... 204
9.1.7. Remote control connection ............................... 205
9.1.8. Arc protection interface (option) ...................... 205
9.2. Tests and environmental conditions .......................... 205
9.2.1. Disturbance tests .................................................. 205
9.2.2. Test voltages .......................................................... 206
9.2.3. Mechanical tests .................................................. 206
9.2.4. Environmental conditions .................................... 206
9.2.5. Casing .................................................................... 206
9.2.6. Package................................................................. 206
9.3. Protection functions ...................................................... 207
9.3.1. Differential protection .......................................... 207
9.3.2. Non-directional current protection ................... 208
9.3.3. Second harmonic function ................................. 210
9.3.4. Circuit-breaker failure protection ...................... 210
9.3.5. Arc fault protection stages (option) .................. 211
9.4. Supporting functions ..................................................... 212
9.4.1. Disturbance recorder (DR) .................................. 212
10. Abbreviations and symbols .............................................. 213
11. Construction ....................................................................... 214
12. Order information ............................................................... 215
13. Revision history ................................................................... 216
14. Reference information ....................................................... 218
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