ABB RELION 615 Series Product Manual page 16

Transformer Protection and Control
RET615
Product version: 5.0 FP1
GUID-46A1FCF8-F2EC-4737-9EA8-636E4AEF84FC V1 EN
Figure 10. Protection of a two-winding power transformer with RET615 standard configuration D
Figure 10 illustrates the protection of a two-winding power
transformer with RET615 standard configuration D. The main
protection used in this application example is transformer
GUID-3C760FFC-6D6B-4860-A198-4BA4273B32D9 V1 EN
Figure 11. Protection of a two-winding power transformer with RET615 standard configuration E
Figure 11 illustrates the protection of a two-winding power
transformer with RET615 standard configuration E. The main
protection used in this application example is transformer
16
3I (HV)
A
U12 0. 0 kV
P 0.00 kW
Q 0.00 kVAr
IL2 0 A
I
ESC Clear
O
R
L
RTD
Io (LV)
3I (LV)
differential protection. Additionally, restricted earth-fault
protection with high-impedance principle is applied on the
transformer's LV side.
3U Uo
A
U12 0. 0 kV
3I (HV) P 0.00 kW
Q 0.00 kVAr
IL2 0 A
I
ESC Clear
O
R
L
Io (HV)
RTD
3I (LV)
differential protection. Additionally, restricted earth-fault
protection with numerical low-impedance principle and voltage
based protection are applied on the transformer's HV side.
RET615
Std. conf. D
ANSI IEC
49T 3Ith>T
50L/50NL ARC
50P/51P 3I>>>
51P/51N 3I/Io
87NH dIoHi>
87T 3dI>T
RET615
Std. conf. E
ANSI IEC
27/59 3U</3U>
49T 3Ith>T
50L/50NL ARC
50P/51P 3I>>>
51P/51N 3I/Io
59G Uo>
87NL dIoLo>
87T 3dI>T
1MRS756891 M
ABB