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About trip assignment Article rated 5.0/5.0
What is the way from the trip signal of a function block to any trip contact? You can find here a short summary about this topic. For significantly more details please visit that link: https://www.pr...
50Hz frequency difference is shown under synchronous conditions with the circuit breaker closed Article not rated yet
The synchro check, synchro switch function needs a definition about the voltages to be compared. This definition is given by the parameter Voltage Select. On the other hand, the relay uses a pre-def...
50Hz frekvenciakülönbséget mutat a szinkronellenőrző annak ellenére, hogy a megszakító zárva van Article not rated yet
A szinkronellenőrző-szinkronkapcsoló funkciónak definiáni kell, hogy melyik két analóg feszültségbemenetet hasonlítsa össze. Erre a c&eacut...
Minimum current for impedance calculation in the distance function Article not rated yet
The distance function is based on impedance loop calculation between the phases and phases to the ground. There is a minimum current requirement in order to start an accurate impedance calculation. Th...
Minimum áram feltétel az impedanciakalkulációhoz Article not rated yet
A távolsági védelem funkció a fázis-fázis illetve fázis-föld hurkokban számított impedancián alapul. A pontos impedanciasz&aa...
Transformer differential protection - testing with earth faults Article rated 4.6/5.0
Vector group of the transformer is YyO, the differential protection function trips by √3 times higher value than expected. What is the reason for it? Protecta uses delta-transformation matrices...
Setting the earth fault compensation factor by secondary injection Article not rated yet
The EuroProt+ distance protection function block is using earth fault compensation factors for accurate impedance calculation in case of phase to ground faults. The formula of the factors is as follow...
Zérus sorrendű kompenzációs állandó figyelembevétele szekunder tesztelés során Article not rated yet
Az EuroProt+ távolság védelmi funkcióblokkja zérus sorrendű komplex kompenzációt használ a hatásosan földelt fázis-föld...
Under/overvoltage function does not start at the set limit Article not rated yet
Voltage function blocks in configurations for MV networks have phase-to-phase voltages as inputs. The set limit concerns also phase-to-phase voltages. That should be taken into considerations also by ...
Time multiplier unit Article not rated yet
The "IDMT" type overcurrent function blocks have the "Time multiplier" parameter. This parameter should not have any unit. Unfortunately in the early EuroProt+ configurations it did have. If your devi...
Are the EuroProt+ devices suitable for linearised current transformers (TPY,TPZ)? Article rated 5.0/5.0
The current transformer modules of the EuroProt+ devices are suitable for measuring the currents from linrearised primary transformers. However, we have not tested the function algorithms with this ty...
 
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