Common Settings For All Steps - ABB REC670 Applications Manual

1MRK 511 401-UUS A
8.5.3.2
Bay control REC670 2.2 ANSI
Application manual
tPCrvx, tACrvx, tBCrvx, tCCrvx: Parameters for programmable inverse time
characteristic curve. The time characteristic equation is according to equation 45:
æ
ç
A
ç
[ ]
=
t s
ç
p
æ ö
i
ç
-
C
ç ÷
è è ipickup ø
EQUATION1722 V1 EN-US
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.

Common settings for all steps

x means step 1, 2, 3 and 4.
AngleRCA: Relay characteristic angle given in degrees. This angle is defined as shown
in figure 78. The angle is defined positive when the residual current lags the reference
voltage (Vpol = -)
ö
÷
÷
+ ×
B TD
÷
÷
ø
Section 8
Current protection
(Equation 45)
GUID-A00A942B-E760-42EE-8FEB-F723426783F3 v1
189