VAMP 59 - Table of Contents

Technical description
Table of Contents
VM59.EN001
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37
Table of Contents
1. Introduction .......................................................................... 40
1.1. Main features ................................................................... 40
1.2. Principles of numerical protection techniques .......... 41
2. Protection functions ............................................................. 44
2.1. Maximum number of protection stages in one
application ................................................................................ 44
2.2. List of protection functions ............................................. 44
2.3. General features of protection stages ........................ 45
2.4. Relay function dependencies ...................................... 49
2.4.1. Current protection function dependencies ....... 49
2.5. Overcurrent protection I> (50/51) ................................ 49
2.5.1. Remote controlled overcurrent scaling .............. 54
2.6. Current unbalance stage I
2
> (46) ................................. 55
2.7. Directional earth fault protection I
0φ
> (67N) ............... 56
2.8. Earth fault protection I
0
> (50N/51N) ............................. 63
2.9. Zero sequence voltage protection U
0
> (59N) ............ 68
2.10. Thermal overload protection T> (49) ........................... 71
2.11. Circuit breaker failure stage CBFP (50BF) .................... 75
2.12. Line differential protection LdI> (87L) .......................... 76
2.12.1. Capacitive charging current ................................ 84
2.12.2. ANSI 85 (POC –signals) ........................................... 85
2.13. Programmable stages (99) ............................................ 86
2.14. Inverse time operation ................................................... 89
2.14.1. Standard inverse delays IEC, IEEE, IEEE2, RI ........ 91
2.14.2. Free parameterization using IEC, IEEE and IEEE2
equations ........................................................................... 102
2.14.3. Programmable inverse time curves ................... 103
3. Supporting functions .......................................................... 104
3.1. Event log ......................................................................... 104
3.2. Disturbance recorder ................................................... 106
3.3. Cold load pick-up and inrush current detection ..... 110
3.4. Current transformer supervision .................................. 113
3.5. Circuit breaker condition monitoring ......................... 114
3.6. System clock and synchronization ............................. 119
3.7. Running hour counter ................................................... 123
3.8. Timers ............................................................................... 124
3.9. Combined overcurrent status ..................................... 126
3.10. Self-supervision ............................................................... 129
3.10.1. Diagnostics ............................................................ 129
4. Measurement functions ..................................................... 131
4.1. Measurement accuracy .............................................. 131
4.2. RMS values ..................................................................... 132
4.3. Harmonics and Total Harmonic Distortion (THD) ...... 132
4.4. Demand values ............................................................. 133
4.5. Minimum and maximum values.................................. 133