Verifying The Settings - ABB RET670 Commissioning Manual

1MRK 504 165-UUS -
11.4.9.1
Transformer protection RET670 2.2 ANSI
Commissioning manual
X1OutFw
X1InFw
RLdOutRv
2
RLdInRv
X1InRv
X1OutRv
IEC09000226 V1 EN
Figure 37: Operating principle and characteristic of the power swing detection
function (settings parameters in italic)
Where:
RLdOutFw · kLdRFw
RLdInFw =
RLdOutRv · kLdRRv
RLdInRv =
X1OutFw = X1InFw + (RLdOutFw - RLdInFw)
X1InRv + (RLdOutFw - RLdInFw)
X1OutRv =

Verifying the settings

Preconditions
The following output signal shall be configured to binary output available: ZOUT,
measured impedance within outer impedance boundary.
Testing functionality by secondary injection
ZL
X
3
j
4
Section 11
j
R
1
RLdOutFw
RLdInFw
IEC09000226_1_en.vsd
143