Common Settings For All Steps - ABB Relion REC670 Applications Manual

1MRK 511 358-UEN A
tResetx : Constant reset time delay in s for step x.
HarmBlockx : This is used to enable block of step x from 2
tPCrvx, tACrvx, tBCrvx, tCCrvx : Parameters for user programmable of inverse time
characteristic curve. The time characteristic equation is according to equation 38:
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t s
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EQUATION1189 V1 EN-US
Further description can be found in the technical reference manual.
tPRCrvx, tTRCrvx, tCRCrvx : Parameters for user programmable of inverse reset time
characteristic curve. Further description can be found in the technical reference manual.
7.4.3.2

Common settings for all steps

AngleRCA : Relay characteristic angle given in degree. This angle is defined as shown in
figure 52. The angle is defined positive when the residual current lags the reference voltage
(Upol = 3U
IEC05000135 V4 EN-US
Figure 52: Relay characteristic angle given in degree
In a normal transmission network a normal value of RCA is about 65°. The setting range is -180°
to +180°.
polMethod : Defines if the directional polarization is from
Application manual
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A
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+ ×
B k
÷
p
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C
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in
or U )
0 2
RCA
Operation
I>Dir
nd
harmonic restrain function.
Upol = 3U or U
0 2
en 05000135 -4-nsi.vsd
Section 7
Current protection
(Equation 38)
M15282-81 v9
121