Hitachi RED670 Commissioning Manual page 126

Section 11
Testing functionality by secondary injection
Table 33:
Test point
1
2
3
4
5
6
7
8
9
10
11
12
13
Table is used in conjunction with figure .
120
Test points for phase-to-phase loops L1-L2 (Ohm/Loop)
Reach Set value
X X1
set
R 0
X X1
set
R R1
set
X 0.8 x X1
set
R 0.8 x R1 + RFPPZx/2
set
X 0.5 x X1
set
R 0.5 x R1 + RFPPZx/2
set
X 0.85 x RFPPZx x tan (ArgLd)
R 0.85 x RFPPZx
X RLdFw x tan (ArgLd)
R RLdFw
X RLdFw x tan (ArgLd)
R 0
X –0.2143 x RFPPZx/2
R 0.8 x RFPPZx/2
X –0.4 x RLdFw x tan(ArgDir=20°)
R 0.4 x RLdFw
X 0.5 x X1
set
R –0.23 x X1
set
X 0.8 x X1
set
R –0.37 x X1
set
X 0.5 x X1
set
R 0.5 x R1
set
X 0
R 0.5 x RFPPZx
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1MRK 505 378-UEN Rev. K
Comments
ArgLd = angle for the maximal load transfer
Exact: 0.8 x RFPPZx/2 (ArgDir=20°)
Exact –0.5 x R1 x tan(ArgNegRes=30°)
set
Exact –0.5 x R1 x tan(ArgNegRes=30°)
set
Line differential protection RED670
Commissioning manual