ABB Relion 650 Series Product Manual page 53

Transformer protection RET650
Version 2.2
Table 31. Directional phase overcurrent protection, four steps Four step phase overcurrent protection, 3-phase output OC4PTOC
Function
Operate current, step 1-4
Reset ratio
Minimum operate current, step 1-4
Relay characteristic angle (RCA)
Relay operating angle (ROA)
Maximum forward angle
Minimum forward angle
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 145, table 146 and table
Operate time, nondirectional start
function
Reset time, nondirectional start function
Operate time, directional start function
Reset time, directional start function
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
1)
Note: Timing accuracy only valid when 2nd harmonic blocking is turned off
Hitachi Power Grids
Range or value
(1-2500)% of lBase
> 95%
(5-10000)% of lBase
(-70.0– -50.0) degrees
(40.0–89.0) degrees
(40.0–70.0) degrees
(75.0–90.0) degrees
(5–100)% of fundamental
, (0.000-60.000) s
set
(0.000-60.000) s
15 curve types
147
25 ms typically at 0 to 2 x I
35 ms typically at 2 x I
50 ms typically at 0 to 2 x I
35 ms typically at 2 x I
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 degrees
±2.0% of I
r
±0.2% or ±35 ms whichever is greater
±0.5% ±25 ms
1)
ANSI/IEEE C37.112
IEC 60255–151
±3% or ±40 ms
0.10 ≤ k ≤ 3.00
1.5 x I ≤ I ≤ 20 x I
set
-
set
to 0 -
set
-
set
to 0 -
set
-
-
-
-
-
set
-
-
-
1MRK 504 172-BEN G
r
r
r
r
set
53