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8.6.1. External input / output module .......................... 183
8.7. Block diagrams .............................................................. 189
8.7.1. VAMP 59 ................................................................. 189
8.8. Connection examples .................................................. 190
8.8.1. VAMP 59 ................................................................. 190
9. Technical data ................................................................... 191
9.1. Connections................................................................... 191
9.1.1. Measuring circuitry ............................................... 191
9.1.2. Auxiliary voltage ................................................... 191
9.1.3. Digital inputs .......................................................... 192
9.1.4. Trip contacts .......................................................... 192
9.1.5. Alarm contacts ..................................................... 192
9.1.6. Local serial communication port ....................... 192
9.1.7. Remote control connection ............................... 193
9.1.8. Analogue output connection (option) ............. 193
9.2. Tests and environmental conditions .......................... 194
9.2.1. Disturbance tests .................................................. 194
9.2.2. Electrical safety tests ............................................ 195
9.2.3. Mechanical tests .................................................. 195
9.2.4. Environmental conditions .................................... 196
9.2.5. Casing .................................................................... 196
9.2.6. Package................................................................. 196
9.3. Protection stages .......................................................... 197
9.3.1. Differential protection .......................................... 197
9.3.2. Overcurrent protection........................................ 198
9.3.3. Circuit-breaker failure protection ...................... 201
9.3.4. Arc fault protection (option) .............................. 201
9.3.5. Digital input/output card (option) ..................... 202
9.4. Supporting functions ..................................................... 202
9.4.1. Disturbance recorder (DR) .................................. 202
9.4.2. Inrush current detection (68) .............................. 203
9.4.3. Transformer supervision ........................................ 203
10. Abbreviations and symbols .............................................. 204
11. Construction ....................................................................... 206
12. Order information ............................................................... 207
13. Revision history ................................................................... 209
14. Reference information ....................................................... 210