ABB RET670 Product Manual page 60

Transformer protection RET670
Customized
Product version: 1.2
Table 46. Sensitive directional residual overcurrent and power protection SDEPSDE
Function
Operate level for 3I ·cosj
0
directional residual
overcurrent
Operate level for 3I ·3U ·
0 0
cosj directional residual
power
Operate level for 3I and j
0
residual overcurrent
Operate level for non-
directional overcurrent
Operate level for non-
directional residual
overvoltage
Residual release current for
all directional modes
Residual release voltage for
all directional modes
Reset ratio
Timers
Inverse characteristics, see
table 109, table 110 and
table 111
Relay characteristic angle
RCA
Relay open angle ROA
60
Range or value
(0.25-200.00)% of lBase
SBase
(0.25-200.00)% of
lBase
(0.25-200.00)% of
(1.00-400.00)% of lBase
UBase
(1.00-200.00)% of
lBase
(0.25-200.00)% of
(0.01-200.00)% of UBase
> 95%
(0.000-60.000) s
19 curve types
(-179 to 180) degrees
(0-90) degrees
1MRK 504 117-BEN D
Accuracy
± 1.0% of I at I £ I
r r
± 1.0% of I at I > I
r
At low setting:
(0.25-1.00)% of I : ±0.05% of I
r
(1.00-5.00)% of I : ±0.1% of I
r r
± 1.0% of S at S £ S
r r
± 1.0% of S at S > S
r
At low setting:
SBase
(0.25-5.00)% of
± 10% of set value
± 1.0% of I at £ I
r r
± 1.0% of I at I > I
r
At low setting:
(0.25-1.00)% of I : ±0.05% of I
r
(1.00-5.00)% of I : ±0.1% of I
r r
± 1.0% of I at I £ I
r r
± 1.0% of I at I > I
r
At low setting <5% of I :
r
±0.1% of I
r
± 0.5% of U at U£U
r r
± 0.5% of U at U > U
r
± 1.0% of I at I £ I
r r
± 1.0% of I at I > I
r
At low setting:
(0.25-1.00)% of I : ±0.05% of I
r
(1.00-5.00)% of I : ±0.1% of I
r r
± 0.5% of U at U£U
r r
± 0.5% of U at U > U
r
-
± 0.5% ±10 ms
See table 109, table 110 and table
± 2.0 degrees
± 2.0 degrees
r
r
r
111
ABB