Issue
The user would like to calculate the Idiff (differential current) and Ires (restrain current) given the injection currents and matching factors
Product Line
Micom P63x transformer differential relay
Environment
Calculating MiCOM settings
Resolution
The formula below is used by the relay to calculate the Idiff and Irestrain:
To simplify the equations, assume that the Zero-sequence current filtering is disabled :
Where Kam,a and Kam,b are the amplitude matching factors calculated by the relay based on Iref/Inom on side a and side b, respectively. Refer to the differential protection section in the manual for more information.
Example:
I,a,sec = 10 A I,nom,secondary= 5 Amps Kam,a= 2.76
I,b,sec = 5 A (180 deg) Kam,b= 1.32
Iref is calculated based reference power and the nominal voltage on side a and b.
The user would like to calculate the Idiff (differential current) and Ires (restrain current) given the injection currents and matching factors
Product Line
Micom P63x transformer differential relay
Environment
Calculating MiCOM settings
Resolution
The formula below is used by the relay to calculate the Idiff and Irestrain:
To simplify the equations, assume that the Zero-sequence current filtering is disabled :
Where Kam,a and Kam,b are the amplitude matching factors calculated by the relay based on Iref/Inom on side a and side b, respectively. Refer to the differential protection section in the manual for more information.
Example:
I,a,sec = 10 A I,nom,secondary= 5 Amps Kam,a= 2.76
I,b,sec = 5 A (180 deg) Kam,b= 1.32
Iref is calculated based reference power and the nominal voltage on side a and b.
Gepubliceerd voor: Schneider Electric Belgium
Hulp nodig?
Selecteer zelf het juiste product
Vind snel en eenvoudig de juiste producten en toebehoren voor uw toepassingen.
Offerte aanvragen
Dien uw aanvraag online in en een expert zal contact met u opnemen.
Verkooppunten
Vind eenvoudig de dichtstbijzijnde distributeur van Schneider Electric op uw locatie.
Help Center
Vind de antwoorden die u nodig heeft via bladeren door veelgestelde vragen over onderwerpen.
