ABB Relion REC670 - Common Settings for All Steps

For IEC inverse time delay characteristics the possible delay time settings are instantaneous
(1) and IEC (2 = set constant time reset).
For the programmable inverse time delay characteristics all three types of reset time
characteristics are available; instantaneous (1), IEC (2 = set constant time reset) and ANSI (3 =
current dependent reset time). If the current dependent type is used settings
pr , tr and cr
must be given.
tPCrvx , tACrvx , tBCrvx , tCCrvx : Parameters for programmable inverse time characteristic
curve. The time characteristic equation is according to equation 45:
[ ] = + ×
-
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p
A
t s B k
i
C
in
EQUATION1189 V1 EN-US (Equation 45)
Further description can be found in the Technical reference manual (TRM).
tPRCrvx , tTRCrvx , tCRCrvx : Parameters for customer creation of inverse reset time
characteristic curve. Further description can be found in the Technical Reference Manual.
7.5.3.2 Common settings for all steps
GUID-A00A942B-E760-42EE-8FEB-F723426783F3 v1
x
means step 1, 2, 3 and 4.
AngleRCA : Relay characteristic angle given in degrees. This angle is defined as shown in
figure
62. The angle is defined positive when the residual current lags the reference voltage
(Upol = -U2)
Section 7 1MRK 511 358-UEN A
Current protection
132
Application manual