Table of Contents
Technical description
42
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VM259.EN007
Current transformer supervision .................................. 158
Voltage transformer supervision ................................. 159
Circuit breaker condition monitoring ......................... 160
Energy pulse outputs .................................................... 165
System clock and synchronization ............................. 168
Running hour counter ................................................... 172
Timers ............................................................................... 173
Combined overcurrent status ..................................... 175
Self supervision ............................................................... 177
Diagnostics ............................................................ 177
Short circuit fault location ............................................ 179
Earth-fault location ....................................................... 183
Measurement functions ..................................................... 185
Measurement accuracy .............................................. 186
RMS values ..................................................................... 187
Harmonics and Total Harmonic Distortion (THD) ...... 188
Demand values ............................................................. 189
Minimum and maximum values ................................. 190
Maximum values of the last 31 days and twelve
months ..................................................................................... 191
Voltage measurement mode ..................................... 191
Power calculation ......................................................... 192
Direction of power and current .................................. 193
Symmetric components ............................................... 194
Primary, secondary and per unit scaling................... 197
Current scaling ...................................................... 197
Voltage scaling ..................................................... 199
Control functions ................................................................ 201
Output relays ................................................................. 201
Digital inputs ................................................................... 202
Virtual inputs and outputs ............................................ 205
Output matrix ................................................................. 206
Blocking matrix .............................................................. 207
Controllable objects ..................................................... 207
Local/Remote selection ...................................... 209
Auto-reclose function (79) ........................................... 210
Logic functions .............................................................. 217
Communication ................................................................. 218
Communication ports .................................................. 218
Local port ............................................................... 219
Remote port X9 ..................................................... 221
Extension port ........................................................ 223
Ethernet port .......................................................... 224
Communication protocols .......................................... 225
PC communication .............................................. 225
Modbus TCP and Modbus RTU ........................... 225
Profibus DP ............................................................. 226