Current Protection; Instantaneous Phase Overcurrent Protection Phpioc - ABB RET670 Product Manual

Transformer protection RET670 2.0
Product version: 2.0

Current protection

Table 42. Instantaneous phase overcurrent protection PHPIOC
Function
Operate current
Reset ratio
Operate time at 0 to 2 x I
set
Reset time at 2 to 0 x I
set
Critical impulse time
Operate time at 0 to 10 x I
set
Reset time at 10 to 0 x I
set
Critical impulse time
Dynamic overreach
Table 43. Four step phase overcurrent protection OC4PTOC
Function
Operate current
Reset ratio
Min. operating current
Relay characteristic angle (RCA)
Relay operating angle (ROA)
2nd harmonic blocking
Independent time delay at 0 to 2 x
I
set
Minimum operate time
Inverse characteristics, see
table 117, table 118 and table
Operate time, start non-directional
at 0 to 2 x I
set
Reset time, start non-directional at
2 to 0 x I
set
Critical impulse time
Impulse margin time
ABB
Range or value
(5-2500)% of lBase
> 95% at (50–2500)% of IBase
Min. = 15 ms
Max. = 25 ms
Min. = 15ms
Max. = 25ms
10 ms typically at 0 to 2 x I
Min. = 5ms
Max. = 15 ms
Min. = 25ms
Max. = 40 ms
2 ms typically at 0 to 10 x I
< 5% at t = 100 ms
Setting range
lBase
(5-2500)% of
> 95% at (50–2500)% of
lBase
(1-10000)% of
(40.0–65.0) degrees
(40.0–89.0) degrees
(5–100)% of fundamental
(0.000-60.000) s
(0.000-60.000) s
16 curve types
119
Min. = 15 ms
Max. = 30 ms
Min. = 15 ms
Max. = 30 ms
10 ms typically at 0 to 2 x I
15 ms typically
set
set
lBase
set
1MRK 504 141-BEN C
Accuracy
± 1.0% of I at I ≤ I
r r
± 1.0% of I at I > I
r
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Accuracy
± 1.0% of I at I ≤ I
r r
± 1.0% of I at I > I
r
-
± 1.0% of I at I ≤ I
r r
±1.0% of I at I > I
r
± 2.0 degrees
± 2.0 degrees
± 2.0% of I
r
± 0.2 % or ± 35 ms whichever is
greater
± 2.0 % or ± 40 ms whichever is
greater
See table 117, table 118 and table
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119
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