ABB Relion 650 Series Product Manual page 56

Transformer protection RET650
Version 2.2
Table 34. Four step residual overcurrent protection EF4PTOC technical data
Function
Operate current
Reset ratio
Operate current for directional comparison,
Zero sequence
Operate current for directional comparison,
Negative sequence
Minimum operating current
Minimum operate time for inverse
characteristics
Timers
Inverse characteristics, see Table 145,
Table 146 and Table 147
Minimum polarizing voltage, Zero sequence
Minimum polarizing voltage, Negative
sequence
Minimum polarizing current, Zero sequence
Minimum polarizing current, Negative
sequence
Real part of source Z used for current
polarization
Imaginary part of source Z used for current
polarization
2)
Operate time, non-directional start function
2)
Reset time, non-directional start function
30 ms typically at 0.5 x I to 2 x I
N
2)
Reset time, directional start function
1)
Note: Timing accuracy only valid when 2nd harmonic blocking is turned off.
2)
Note: Operate time and reset time are only valid if harmonic blocking is turned off for a step.
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Range or value
(1-2500)% of IBase
> 95%
(1–100)% of IBase
(1–100)% of IBase
(1-10000)% of IBase
(0.000-60.000) s
(0.000-60.000) s
15 curve types
(1–100)% of UBase
(1–100)% of UBase
(2–100)% of IBase
(2–100)% of IBase
(0.50-1000.00) W/phase
(0.50–3000.00) W/phase
30 ms typically at 0.5 x I
x I
set
30 ms typically at 2 x I
x I
set
-
N
30 ms typically at 2 x I
x I
N
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Accuracy
±1.0% of I at I < I
r r
±1.0% of I at I > I
r
-
±2.0% of I
r
±2.0% of I
r
±1.0% of I at I < I
r r
±1.0% of I at I > I
r
±0.5% ±25 ms
±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
±0.5% of U
r
±0.5% of U
r
±1.0% of I
r
±1.0% of I
r
-
-
to 2 -
set
to 0.5 -
set
to 0.5 -
N
1MRK 504 172-BEN G
set
Hitachi Power Grids