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3.6. Current transformer supervision .................................. 158
3.7. Voltage transformer supervision ................................. 159
3.8. Circuit breaker condition monitoring ......................... 160
3.9. Energy pulse outputs .................................................... 165
3.10. System clock and synchronization ............................. 168
3.11. Running hour counter ................................................... 172
3.12. Timers ............................................................................... 173
3.13. Combined overcurrent status ..................................... 175
3.14. Self supervision ............................................................... 177
3.14.1. Diagnostics ............................................................ 177
3.15. Short circuit fault location ............................................ 179
3.16. Earth-fault location ....................................................... 183
4. Measurement functions ..................................................... 185
4.1. Measurement accuracy .............................................. 186
4.2. RMS values ..................................................................... 187
4.3. Harmonics and Total Harmonic Distortion (THD) ...... 188
4.4. Demand values ............................................................. 189
4.5. Minimum and maximum values ................................. 190
4.6. Maximum values of the last 31 days and twelve
months ..................................................................................... 191
4.7. Voltage measurement mode ..................................... 191
4.8. Power calculation ......................................................... 192
4.9. Direction of power and current .................................. 193
4.10. Symmetric components ............................................... 194
4.11. Primary, secondary and per unit scaling................... 197
4.11.1. Current scaling ...................................................... 197
4.11.2. Voltage scaling ..................................................... 199
5. Control functions ................................................................ 201
5.1. Output relays ................................................................. 201
5.2. Digital inputs ................................................................... 202
5.3. Virtual inputs and outputs ............................................ 205
5.4. Output matrix ................................................................. 206
5.5. Blocking matrix .............................................................. 207
5.6. Controllable objects ..................................................... 207
5.6.1. Local/Remote selection ...................................... 209
5.7. Auto-reclose function (79) ........................................... 210
5.8. Logic functions .............................................................. 217
6. Communication ................................................................. 218
6.1. Communication ports .................................................. 218
6.1.1. Local port ............................................................... 219
6.1.2. Remote port X9 ..................................................... 221
6.1.3. Extension port ........................................................ 223
6.1.4. Ethernet port .......................................................... 224
6.2. Communication protocols .......................................... 225
6.2.1. PC communication .............................................. 225
6.2.2. Modbus TCP and Modbus RTU ........................... 225
6.2.3. Profibus DP ............................................................. 226
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