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Line distance protection REL670
Version 2.2
Table 55. Directional phase overcurrent protection, four steps OC4PTOC
Function
Operate current, step 1-4
Reset ratio
Minimum operate current, step 1-4
Relay characteristic angle (RCA)
Relay operating angle (ROA)
Second harmonic blocking
Independent time delay at 0 to 2 x I
step 1-4
Minimum operate time for inverse
curves , step 1-4
Inverse time characteristics, see
table 208, table
209
and table
Operate time, start non-directional at 0
to 2 x I
set
Reset time, start non-directional at 2 x
I
to 0
set
Operate time, start non-directional at 0
to 10 x I
set
Reset time, start non-directional at 10 x
I
to 0
set
Critical impulse time
Impulse margin time
Operate frequency, directional
overcurrent
Operate frequency, non-directional
overcurrent
Hitachi Energy
Range or value
(5-2500)% of lBase
> 95% at (50–2500)% of lBase
(1-10000)% of lBase
(40.0–65.0) degrees
(40.0–89.0) degrees
(5–100)% of fundamental
,
(0.000-60.000) s
set
(0.000-60.000) s
16 curve types
210
Min. = 15 ms
Max. = 30 ms
Min. = 15 ms
Max. = 30 ms
Min. = 5 ms
Max. = 20 ms
Min. = 20 ms
Max. = 35 ms
10 ms typically at 0 to 2 x I
15 ms typically
38-83 Hz
10-90 Hz
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M12342-1 v23
Accuracy
±1.0% of I
at I ≤ I
r
±1.0% of I at I > I
-
±1.0% of I
at I ≤ I
r
±1.0% of I at I > I
±2.0 degrees
±2.0 degrees
±2.0% of I
r
±0.2% or ±35 ms whichever is greater
±0.2% or ±35 ms whichever is greater
See table 208, table
-
-
-
-
-
set
-
-
-
1MRK 506 372-BEN Q
r
r
r
r
209
and table
210
91
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