ABB REL670 2.2 IEC, Applications Manual

Page: 499 / 908

For the independent time delay characteristics the possible delay time settings are
instantaneous (1) and IEC (2 = set constant time reset).
For ANSI 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).
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 467 :
[ ]
= + ×
-
>
æ ö
ç ÷
ç ÷
ç ÷
æ ö
ç ÷
ç ÷
è ø
è ø
p
A
t s B k
i
C
in
EQUATION1189 V1 EN-US
(Equation 467)
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.
9.5.3.2 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 272 . The angle is defined positive when the residual current lags
the reference voltage (Upol = -U2)
1MRK 506 369-UEN B
Section 9
Current protection
Line distance protection REL670 2.2 IEC 493
Application manual