ABB Relion 670 series - Page 469

R
X
Apparent
impedance at
normal load
Z
C
Z
A
Z
B
anglePhi
IEC07000015_2_en.vsd
IEC07000015 V2 EN
Figure 239: Impedances to be set for pole slip protection PSPPPAM (78)
The setting parameters of the protection
are:
Z
A
Block transformer + source impedance in the forward direction
Z
B
The generator transient reactance
Z
C
The block transformer reactance
AnglePhi The impedance phase angle
Use the following generator data:
VBase : 20 kV
SBase set to 200 MVA
X
d
': 25%
1MRK 506 369-UUS - Section 8
Impedance protection
Line distance protection REL670 2.2 ANSI 463
Application manual