The generator protection functions with their English and Dutch description, including ASCI/IEEE device codes and IEC symbols, are implemented in a table.
The first colomn contains the ANSI/IEEE Device Numbers that are worldwide most commonly used. The second column is derived from IEC 60617 (part 7). In older drawings this standard is used widely. IEC 61850 is a modern, globally accepted standard for communication in electrical substations via Ethernet. In the table below we present the ‘Logical Node Class’. For further specification, a pre-code is used.
| IEEE C37-2 | IEC 60617 | IEC 61850 | Protective Function | Beveiligingsfunctie |
|---|---|---|---|---|
| 21 | Z < | PDIS | Distance | Distantie |
| 24 | V/Hz > | PVPH | V/Hz (Overexcitation) | V/Hz (Overbekrachtiging) |
| 26 | T > | PTTR | Overtemperature | Temperatuurbewaking |
| 27 | U < | PTUV | Undervoltage | Onderspanning |
| 27TN | PHIZ | 3rd Harmonic Neutral Undervoltage | Onderspanning in sterpunt, 3e harmonische | |
| 32R | -P > | PDOP | Reverse Power (Motoring) | Terugwatt |
| 37, 32LF | P < | PDUP | Underpower (Low Forward Power) | Laag wattvermogen |
| 38 | PTTR | Bearing Overtemperature | Temperatuurbewaking lager | |
| 39 | Bearing High Vibration | Lagertrillingsbewaking | ||
| 40 | X < | PDIS | Loss of Field | Veldverlies |
| 46 | I2 > | PTOC | Negative Sequence Overcurrent | Stroomonbalans (asymmetrie) |
| 49 | T > | PTTR | Stator Thermal (RTD or replica) | Temperatuurbewaking stator (RTD of model) |
| 50/27 | PIOC | Inadvertent Energizing | Onbedoelde inschakeling | |
| 50 | I >> | PIOC | Instantaneous Overcurrent | Overstroom, onvertraagd |
| 50DT | I > | PIOC | Definite Time Overcurrent | Onafhankelijk maximaal stroomtijd |
| 51 | I > | PTOC | (Inverse) Time Overcurrent | Afhankelijk maximaal stroomtijd |
| 51N | Io > | PTOC | Neutral Overcurrent (Ground Fault) | Overstroom in nulleider (aardfout) |
| 51V | U↗I> | PVOC | Voltage Dependent Overcurrent | Spanningsafhankelijk afhankelijk maxIt |
| 58 | Diode Failure | Diodefout | ||
| 59 | U > | PTOV | Overvoltage | Overspanning |
| 59N | Uo > | PTOV | Neutral Overvoltage (Ground Fault) | Overspanning in sterpunt (aardfout) |
| 64F | PRTR | Field (Rotor) Ground Fault | Rotoraardfout | |
| 64S | 100% stator ground fault with subharmonic voltage injection | 100% stator aardfout met subharm. spanningsinjectie | ||
| 67N | PSDE | Directional Ground Overcurrent | Richtingsgevoelig aardfoutstroom | |
| 76 | Ife > | Excitation Field Overcurrent | Maximaal bekrachtigingsstroom | |
| 78 | PPAM | Out of Step – Pole Slip | Poolslip | |
| 81U | f < | PTUF | Underfrequency | Onderfrequentie |
| 81O | f > | PTOF | Overfrequency | Overfrequentie |
| 81R | df/dt> | PFRC | Rate of Frequency Change | Frequentieverloop |
| 87G | Id > | PDIF | Generator Differential | Generatordifferentiaal |
| 87T | Id > | PDIF | Transformer Differential | Transformatordifferentiaal |
| 87U | Id > | PDIF | Unit Differential | Blokdifferentiaal |
| 87GN, 64REF | Idn > | PDIF | Generator Ground Differential | Nulstroomdifferentiaal |
Some other functions that are not directly protective functions, but functions that can be integrated in the generator protection system are given in the table below.
| IEEE C37-2 | Afk. | IEC 61850 | Function | Functie |
|---|---|---|---|---|
| 11G | MGPS | Multifunction generator protection system | Multifunctioneel generator beveiligingsrelais | |
| 25 | SYNC | RSYN | Synchronism-check | Synchrocheck |
| 41 | FCB | Field Circuit Breaker | Veldschakelaar | |
| 50BF | BF | RBRF | Breaker Failure | Fout in schakelaar |
| 52G | GCB | XCBR | Generator Circuit Breaker | Generatorschakelaar |
| 52L | LCB | XCBR | Line Circuit Breaker | Koppelschakelaar |
| CTS | LLN0 | Current Transformer Supervision | Verlies van meetstroom | |
| 60-FL | VTS | LLN0 | Voltage Transformer Supervision (Fuse Loss) | Verlies van meetspanning |
| 74TC | TCS | SCBR | Trip circuit supervision | Tripcircuitbewaking |
| 86 | LR | Hand-reset Lockout Relay | Houdrelais met handmatige reset |
See also
- Hans Stutvoet – Protection relays then and now
- Hans Stutvoet – Links to protection relay manufacturers
- Wikipedia – ANSI Device Numbers
References
- IEEE C37.2-2008 – IEEE Standard Electrical Power System Device Function Numbers, Acronyms, and Contact Designations
- IEEE C37.102-2006 – IEEE Guide for AC Generator Protection
- IEC 60617-7 – Graphical symbols for diagrams. Part 7: Switchgear, controlgear and protective devices (withdrawn)
- IEC 61850 – Communication Networks and Systems in Substations
