ABB RET670 - Page 132

Table 24: Test points for phase-to-phase loops L1-L2 (Ohm/Loop)
Test point Reach Set value Comments
1 X X1
set
R 0
2 X X1
set
R R1
set
3 X 0.8 x X1
set
R 0.8 x R1
set
+ RFPP/2
4 X 0.5 x X1
set
R 0.5 x R1
set
+ RFPP/2
5 X 0.85 x RFPP x tan (LdAngle) LdAngle = angle for the maximal load
transfer
R 0.85 x RFPP
6 X RLdFwd x tan (LdAngle)
R RLdFwd
7 X RLdFw x tan (LdAngle)
R 0
8 X –0.2143 x RFPP/2 Exact: 0.8 x RFPP/2 (ArgDir)
R 0.8 x RFPP/2
9 X –0.4 x RLdFwd x tan(ArgDir)
R 0.4 x RLdFwd
10 X 0.5 x X1
set
Exact –0.5 x R1
set
x tan(ArgNegRes-90)
R –0.23 x X1
set
11 X 0.8 x X1
set
Exact –0.5 x R1
set
x tan(ArgNegRes-90)
R –0.37 x X1
set
12 X 0.5 x X1
set
R 0.5 x R1
set
13 X 0 Only used when OperationLdCmp setting
is 0 (Disabled)
R 0.5 x RFPP
Table 25: Test points for phase-to-earth L3-G (Ohm/Loop)
Test point
Reach Value Comments
1 X (2 x X1
set
+X0
set
)/3
R 0
2 X (2 x X1
set
+ X0
set
)/3
R 2 x R1
set
+ R0
set
)/3
Table continues on next page
Section 11 1MRK 504 165-UUS -
Testing functionality by secondary injection
126 Transformer protection RET670 2.2 ANSI
Commissioning manual