Table 50. Breaker failure protection CCRBRF
Function Range or value Accuracy
Operate phase current (5-200)% of
lBase
±1.0% of I
r
at I £ I
r
±1.0% of I at I > I
r
Reset ratio, phase current > 95% -
Operate residual current (2-200)% of
lBase
±1.0% of I
r
at I £ I
r
±1.0% of I at I > I
r
Reset ratio, residual current > 95% -
Phase current level for blocking of contact function (5-200)% of
lBase
±1.0% of I
r
at I £ I
r
±1.0% of I at I > I
r
Reset ratio > 95% -
Operate time for current detection 10 ms typically -
Reset time for current detection 15 ms maximum -
Time delay for re-trip at 0 to 2 x I
set
(0.000-60.000) s ±0.2% or ±15 ms whichever is
greater
Time delay for back-up trip at 0 to 2 x I
set
(0.000-60.000) s ±0.2% or ±15 ms whichever is
greater
Time delay for back-up trip at multi-phase start at 0 to 2 x I
set
(0.000-60.000) s ±0.2% or ±20 ms whichever is
greater
Additional time delay for a second back-up trip at 0 to 2 x I
set
(0.000-60.000) s ±0.2% or ±20 ms whichever is
greater
Time delay for alarm for faulty circuit breaker (0.000-60.000) s ±0.2% or ±15 ms whichever is
greater
Table 51. Pole discordance protection CCPDSC
Function
Range or value Accuracy
Operate current (0–100)% of
IBase
±1.0% of I
r
Independent time delay between
trip condition and trip signal
(0.000-60.000) s ±0.2% or ± 25 ms whichever is greater
Table 52. Directional underpower protection GUPPDUP
Function
Range or value Accuracy
Power level
for Step 1 and Step 2
(0.0–500.0)% of
SBase
± 1.0% of S
r
at S ≤ S
r
± 1.0% of S at S > S
r
where
Characteristic angle
for Step 1 and Step 2
(-180.0–180.0) degrees ± 2.0 degrees
Independent time delay to operate for Step 1
and Step 2 at 2 to 0.5 x S
r
and
k
=
0.000
(0.01-6000.00) s ± 0.2% or ± 40 ms whichever is greater
Transformer protection RET670 2.0
1MRK 504 141-BEN C
Product version: 2.0
68 ABB
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