GUID-3A506E19-4E77-4866-8EDC-6264823E1090 V1 EN
Figure 205: Functional module diagram. I_x1 and I_x2 represent the phase
currents of winding 1 and winding 2
Differential calculation
TR2PTDF operates phase-wise on a difference of incoming and outgoing currents.
The positive direction of the currents is towards the protected object.
Winding 1
(usually HV)
Winding 2
(usually LV)
1W
I
2W
I
GUID-DABAB343-214F-4A86-ADC8-BFD8E64B25A7 V3 EN
Figure 206: Positive direction of the currents
GUID-0B35503B-CA7D-4598-A1E4-59C9AA66012D V2 EN
(Equation 44)
1YHT530004D05 D Section 4
Protection functions
615 series 385
Technical Manual
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