| Protective functions | IEC 61850 | ANSI | DIGISAVE |
|---|---|---|---|
| Nondirectional overcurrent, two-level | PTOC | 50/51 |
RN RB |
| Switch failure protection | RBRF | 50BF |
RN RB |
| Automatic reclosure | RREC | 79 | RN |
|
Thermal overload: One- or two-body model of thermal overload (e.g. for motors, cables, dry and oil transformers) | PTTR | 49 & 49II |
RN RB |
| Minimal current | PTUC | 37 | RN |
| Inrush protection | PHAR | 68 | RN |
| Switch-onto-fault protection | PIOC | 50 | RN |
| Nondirectional ground current, two-level | PTOC | 50N/51N | RN |
| Autoreclosure lock | PMRI | 66/86 | RN |
| Locked rotor protection | PZSU | 14 | RN |
| Load-jam protection | PTOC | 51M | RN |
| Phase balance | PTOC | 46 | RN |
| Start-up time monitoring | PMSS | 46 | RN |
| Busbar protection according to H2 | PSCH | 85 | RD |
| Zero current, two levels, U0 | PTOV | 59G | RD |
|
Basic directional ground short circuit protection for low-resistance and rigid grids | PTOC | 67N | RD |
|
Bidirectional ground fault for isolated, compensated grids (watt and P/Q) | PTEF/PSDE | 32N | RD |
|
Bidirectional intermittent ground fault for isolated, compensated grids (energy) | PTEF/PSDE | 67NIEF | RD |
| Bidirectional short circuit protection: two-level | PTOC | 67 | RD |
| Under/overvoltage protection depending on the two-level | PTUV/PTOV | 27/59 | RD |
| Under/overfrequency protection depending on the two-level | PTUV/PTOV | 81U/81O | RD |
| Rotary field check | – | 47 | RD |
| Voltage imbalance | PTOV | 47O | RD |
| Protection-related functions | IEC 61850 | ANSI | DIGISAVE |
|---|---|---|---|
| Transfer trips | PSCH | LAL | RD |
| Signal comparison (phases and ground faults) | PSCH | 85 | RD |
| Power monitor with H2 | PSCH | 85H2 | RD |
| Control | IEC 61850 | ANSI | DIGISAVE | |
|---|---|---|---|---|
| Circuit breaker control | XSWI | I↔O | • | |
| Trigger circuit monitor | SCBR | TCS | • | |
| Voltage transformer automatically tripped | QRFUF | 60 | • | |
| Auxiliary voltage monitor | NZBAT | – | • | |
| Circuit breaker failure protection | CBCM | 50 | BF | • |
| Measuring | IEC 61850 | ANSI | DIGISAVE |
|---|---|---|---|
| Three-phase current display | MMXU | 3I | • |
| Three-phase voltage display LE | MMXU | 3ULE | RD |
| Three-phase voltage display LL | MMXU | 3ULL | RD |
| Ground current | MMXU | I0 | RD |
| Zero voltage | MMXU | U0 | RD |
| P/Q/S power | MMXU | SPQ | RD |
| Power factor cos | MMXU | cos | RD |
| Frequency | MMXU | f | RD |
| 15 mins mean value with date per phase | MMXU | 3I /15 mins | • |