MR ETOS IM User Manual

Table of contents
Maschinenfabrik Reinhausen GmbH 20196 5163667/06 ENETOS
®
IM
7.7.4 Detecting parallel operation via group inputs (optional) ....................................................................................148
7.8 Monitoring functions........................................................................................................................ 149
7.8.1 Voltage monitoring ............................................................................................................................................149
7.8.2 Current monitoring ............................................................................................................................................151
7.8.3 Power monitoring ..............................................................................................................................................154
7.8.4 Power flow monitoring.......................................................................................................................................155
7.8.5 Tap position monitoring (optional).....................................................................................................................157
7.8.6 Bandwidth monitoring........................................................................................................................................158
7.8.7 Phase symmetry monitoring..............................................................................................................................160
7.8.8 Temperature monitoring....................................................................................................................................162
7.8.9 Tx statistics monitoring......................................................................................................................................163
7.8.10 Monitoring the gas volume of the Buchholz relay (OLTC) ................................................................................164
7.8.11 Monitoring the gas volume of the Buchholz relay (transformer)........................................................................165
7.8.12 Monitoring the oil pressure (transformer) ..........................................................................................................166
7.8.13 Monitoring the oil pressure (on-load tap-changer) ............................................................................................167
7.9 Target-tap-position operation.......................................................................................................... 168
7.10 Measured values ............................................................................................................................ 168
7.10.1 Displaying current measured values .................................................................................................................168
7.10.2 Displaying measured value recorder (optional).................................................................................................169
7.10.3 Setting the average value interval.....................................................................................................................173
7.10.4 Displaying temperature curve (optional) ...........................................................................................................174
7.10.5 Displaying winding temperatures (optional) ......................................................................................................175
7.10.6 Displaying the measured values of the Buchholz relay (optional).....................................................................176
7.10.7 Displaying the measured values of the pressure relief device (optional) ..........................................................177
7.10.8 Displaying the measured values of the dehydrating breather (optional) ...........................................................177
7.11 On-load tap-changer monitoring..................................................................................................... 178
7.11.1 Changing tap position designation (optional) ....................................................................................................178
7.11.2 Displaying tap-change operation statistics (optional)........................................................................................179
7.11.3 Motor Current Index (MCI) ................................................................................................................................180
7.11.4 Displaying information about contact wear (only OILTAP®).............................................................................184
7.12 Transformer monitoring .................................................................................................................. 185
7.12.1 Hot-spot calculation (optional)...........................................................................................................................185
7.12.2 Hot-spot forecast (optional)...............................................................................................................................188
7.12.3 Setting calculation of transformer's loss of life (optional) ..................................................................................189
7.12.4 Displaying protective device status (optional) ...................................................................................................190
7.13 Cooling system control (optional) ................................................................................................... 191
7.13.1 Configuring cooling stages................................................................................................................................191

MR ETOS IM Specifications

General

Brand	MR
Model	ETOS IM
Category	Measuring Instruments
Language	English