Table of Contents
Technical description
40
VAMP 24h support phone +358 (0)20 753 3264
VM265.EN011
Virtual inputs and outputs ............................................ 129
Output matrix ................................................................. 130
Blocking matrix .............................................................. 131
Controllable objects ..................................................... 132
Local/Remote selection ...................................... 134
Logic functions .............................................................. 134
Communication ................................................................. 135
Communication ports .................................................. 135
Local port X4 ......................................................... 136
Remote port X5 ..................................................... 138
Extension port X4 ................................................... 139
Ethernet port .......................................................... 140
Communication protocols .......................................... 141
PC communication .............................................. 141
Modbus TCP and Modbus RTU ........................... 141
Profibus DP ............................................................. 142
SPA-bus ................................................................... 144
IEC 60870-5-103 ..................................................... 145
DNP 3.0 ................................................................... 147
IEC 60870-5-101 ..................................................... 148
External I/O (Modbus RTU master) ..................... 149
IEC 61850 ................................................................ 149
EtherNet/IP ............................................................. 151
Applications ........................................................................ 153
Restricted earth fault protection ................................ 153
Restricted earth fault protection for a transformer with
neutral connection ................................................................ 154
CT Requirements ................................................... 155
Calculating the stabilizing resistance R
and actual sensitivity ............................................................. 156
Value of stabilizing resistor R
.............................. 156
Voltage limitation ................................................. 157
Actual operating sensitivity ................................. 157
Example ................................................................. 158
Current Transformer Selection ..................................... 159
CT classification according IEC 60044-1, 1996 . 159
CT Requirement for Protection ........................... 162
Protection of a Dyn11 transformer ............................. 165
Protection of a YNd11 transformer ............................. 167
Protection of generator and block transformer ....... 168
Application example of differential protection using
VAMP 265 ................................................................................ 169
Trip Circuit Supervision .................................................. 170
Trip circuit supervision with one digital input .... 170
Trip circuit supervision with DI19 and DI20 ........ 178
Connections ....................................................................... 182
Rear panel view ............................................................ 182
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