VAMP 52 - Page 38

Table of Contents Technical description
38
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3.8. Running hour counter................................................... 130
3.9. Timers............................................................................... 131
3.10. Combined overcurrent status ..................................... 132
3.11. Self-supervision............................................................... 135
3.11.1. Diagnostics ............................................................ 136
4. Measurement functions.....................................................137
4.1. Measurement accuracy.............................................. 137
4.2. RMS values ..................................................................... 138
4.3. H
armonics and Total Harmonic Distortion (THD) ...... 139
4.4. D
emand values ............................................................. 139
4.5. Minimum and maximum values ................................. 140
4.6. Maximum values of the last 31 days and twelve
months ..................................................................................... 141
4.7. Voltage measurement modes.................................... 141
4.8. Power calculations ....................................................... 143
4.9. Direction of power and current .................................. 144
4.10. Symmetric components............................................... 145
4.11. Primary, secondary and per unit scaling................... 145
4.11.1. Current scaling ...................................................... 146
4.11.2. Voltage scaling..................................................... 148
4.12. Analogue output (option) ........................................... 150
4.12.1. mA scaling example ............................................ 151
5. Control functions ................................................................152
5.1. Output relays ................................................................. 152
5.2. Digital inputs................................................................... 153
5.3. Virtual inputs and outputs............................................ 154
5.4. Output matrix................................................................. 155
5.5. Blocking matrix .............................................................. 156
5.6. C
ontrollable objects ..................................................... 156
5.6.1. Local/Remote selection ...................................... 158
5.7. A
uto-reclose function (79)........................................... 159
5.8. Lo
gic functions .............................................................. 166
6. Communication
.................................................................167
6.1. C
ommunication ports .................................................. 167
6.1.1. Local port (Front panel)....................................... 168
6.1.2. Re
mote port .......................................................... 170
6.1.3. Extension port ........................................................ 171
6.1.4. E
thernet port.......................................................... 172
6.2. C
ommunication protocols .......................................... 172
6.2.1. PC communication .............................................. 173
6.2.2. Modbus TCP and Modbus RTU ........................... 173
6.2.3. Profibus DP ............................................................. 174
6.2.4. S
PA-bus................................................................... 176
6.2.5. IEC
60870-5-103 ..................................................... 176
6.2.6. DNP 3.0 ................................................................... 178
6.2.7. IEC 60870-5-101 ..................................................... 180
6.2.8. Ethernet port.......................................................... 181