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ANSI
EMR-3MP0
Functions
67
Directional Overcurrent
67N
Directional Neutral Overcurrent
67Ns
Sensitive Directional Neutral Overcurrent
68
Power Swing Blocking
74TC
Trip Circuit Supervision
78
Out of Step Tripping
78V
Vector Surge Protection
79
Auto Reclosure
81
Frequency Protection
81U
Underfrequency Protection
81O
Overfrequency Protection
81R
ROCOF (df/dt)
86
Lock Out
87
Differential Protection (Generator/Transformer/Busbar)
87B
Busbar Differential Protection
87G
Generator Differential Protection
87GN
Generator Ground Differential Protection
87M
Motor Differential Protection
87SV
Open CT Supervision (see also 87 / 87B)
87T
Transformer Differential Protection
87TN
Transformer Ground Differential Protection
CLK
Clock synchronization (e. g. via IRIG-B)
DDR
Non-fault disturbance recording
DFR
Digital fault recording
LGC
Logic, scheme
MET
Substation metering (energy, amps, volts, watts, vars, power factor,
demand)
SER
Time-tagged event data
TCM
Trip circuit monitor / supervision
273
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EMR-3MP0
11 Appendix
11.3 List of ANSI Codes