IG-267-EN versión 01; 07/04/2017
3
General Instructions
ekor.rpa
Contents
Contents
1. General description ..................................................5
1.1. General operating features ...................6
1.2. Components.................................7
1.2.1. Electronic relay ..............................8
1.2.2. Current sensors ..............................9
1.2.3. Voltage sensors ..............................9
1.2.4. “Binox” bistable tripping device and
tripping coil ................................10
1.3. Functionality of the unit.....................10
1.4. Communications............................11
2. Applications .............................................................12
2.1. Remote control of transformer and
distribution substations .....................12
2.2. Automatic reclosing of lines .................12
2.3. Line protection with circuit-breaker..........13
2.4. Transformer protection......................14
2.5. Automatic transfer . . . . . . . . . . . . . . . . . . . . . . . . . .16
2.6. Detection of phase with earthing............16
2.7. Protection and control of
MV interconnection stations.................17
2.8. Energy balances ............................17
3. Metering functions ..................................................18
3.1. Current and voltage metering ...............18
3.2. Power meterings............................19
3.3. Energy meter ...............................19
4. Protection functions ................................................20
4.1. Overcurrent units ...........................20
4.1.1. Timed overcurrent units.....................20
4.1.2. Instantaneous overcurrent units.............21
4.1.3. Block diagram ..............................21
4.2. Ultra-sensitive earth.........................22
4.3. Directional units ............................23
4.3.1. Phase directional units ......................23
4.3.2. Neutral and sensitive neutral
directional units ............................24
4.4. Thermal image unit .........................25
4.4.1. Estimated thermal capacity..................26
4.4.2. Functionality................................27
4.4.3. Block diagram ..............................28
4.5. Broken conductor unit ......................29
4.5.1. Calculation of sequence currents ............29
4.5.2. Functionality................................32
4.5.3. Block diagram ..............................32
4.6. Voltage units ...............................33
4.6.1. Timed overvoltage units ....................34
4.6.2. Instantaneous overvoltage units.............34
4.6.3. Timed undervoltage units ...................35
4.6.4. Instantaneous undervoltage units ...........35
4.6.5. Block diagram ..............................36
4.7. Second harmonic blocking unit .............37
4.7.1. Functionality................................37
4.7.2. Block diagram ..............................39
4.8. Block by I
max
.................................41
5. Detection, automation and control functions .......42
5.1. Recloser automation ........................42
5.1.1. Functionality................................42
5.1.2. VREF........................................42
5.1.3. Settings ....................................43
5.1.4. Recloser statuses............................43
5.2. Voltage presence/absence automation ......45
5.2.1. Functionality................................45
5.2.2. Settings ....................................45
5.2.3. Voltage presence/absence
automation statuses ........................45
5.3. Switch control ..............................46
5.3.1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
5.3.2. Settings ....................................46
5.3.3. Switch control statuses......................47
5.4. Remote control .............................47
6. Sensors ......................................................................48
6.1. Current sensors .............................48
6.1.1. Functional characteristics
of current sensors...........................49
6.1.2. Vector sum/zero-sequence wiring ...........50
6.2. Voltage sensors .............................51
6.2.1. Bushing ....................................51
6.2.2. ekor.evt-c ..................................52
7. Technical characteristics of the equipment ...........53
7.1. Rated values ................................53
7.2. Mechanical design ..........................53
7.3. Insulation tests..............................54
7.4. Electromagnetic compatibility...............54
7.5. Climatic tests ...............................55
7.6. Mechanical tests ............................55
7.7. Power tests .................................55
7.8. CE Conformity ..............................55
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