Hitachi Relion 670 Series Product Manual page 107

Line differential protection RED670
Version 2.2
Table 67. Stub protection STBPTOC
Function
Operating current
Reset ratio
Independenttime delay at 0 to 2 x I
Operate time, start at 0 to 2 x I
Reset time, start at 2 x I to 0
set
Operate time, start at 0 to 5 x I
Reset time, start at 5 x I to 0
set
Critical impulse time
Impulse margin time
Table 68. Pole discordance protection CCPDSC
Function
Operate current
Independent time delay between trip
condition and trip signal
Table 69. Directional underpower protection GUPPDUP
Function
Power level
for Step 1 and Step 2
Characteristic angle
for Step 1 and Step 2
Independent time delay to operate for Step 1
and Step 2 at 2 x S to 0.5 x S
r
Hitachi Energy
Range or value
(5-2500)% of IBase
>95% at (50- 2500)% of IBase
(0.000-60.000) s
set
Min.= 10 ms
set
Max.= 25 ms
Min.= 10 ms
Max.= 25 ms
Min.= 5 ms
set
Max.= 20 ms
Min.= 15 ms
Max.= 30 ms
10 ms typically at 0 to 2 x I
15 ms typically
Range or value
(0–100)% of IBase
(0.000-60.000) s
Range or value
(0.0–500.0)% of SBase
(-180.0–180.0) degrees
(0.01-6000.00) s
and k=0.000
r
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M12350-1 v13
set
M13279-1 v10
Accuracy
±1.0% of I
±0.2% or ± 30 ms whichever is greater
SEMOD175152-2 v11
Accuracy
±1.0% of S
±1.0% of S at S > S
where
=
S 1.732
r
±2.0 degrees
±0.2% or ±40 ms whichever is greater
1MRK 505 379-BEN R
Accuracy
± 1.0% of I at I ≤ I
r r
± 1.0% of I at I > I
r
±0.2% or ±30 ms whichever is greater
r
at S ≤ S
r r
r
× ×
U I
r r
107