ABB RET670 Product Manual page 61

ABB
Transformer protection RET670
Pre-configured
Product version: 1.1
Table 36. Sensitive directional residual overcurrent and power protection SDEPSDE
Function
Operate level for 3I ·cosj
0
directional residual
overcurrent
Operate level for 3I ·3U
0
· cosj directional residual
power
Operate level for 3I and
0
j 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 89, table 90 and
table 91
Relay characteristic angle
RCA
Relay open angle ROA
Range or value
(0.25-200.00)% of lBase
At low setting:
(2.5-10) mA
(10-50) mA
(0.25-200.00)% of SBase
0
At low setting:
(0.25-5.00)% of SBase
(0.25-200.00)% of lBase
At low setting:
(2.5-10) mA
(10-50) mA
(1.00-400.00)% of lBase
At low setting:
(10-50) mA
(1.00-200.00)% of UBase
(0.25-200.00)% of lBase
At low setting:
(2.5-10) mA
(10-50) mA
(0.01-200.00)% of UBase
> 95%
(0.000-60.000) s
19 curve types
(-179 to 180) degrees
(0-90) degrees
1MRK 504 091-BEN B
Issued: June 2010
Accuracy
± 1.0% of I at I £ I
r r
± 1.0% of I at I > I
r
±1.0 mA
±0.5 mA
± 1.0% of S at S £ S
r r
± 1.0% of S at S > S
r
± 10% of set value
± 1.0% of I at £ I
r r
± 1.0% of I at I > I
r
±1.0 mA
±0.5 mA
± 1.0% of I at I £ I
r r
± 1.0% of I at I > I
r
± 1.0 mA
± 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
±1.0 mA
± 0.5 mA
± 0.5% of U
at U£U
r r
± 0.5% of U at U > U
r
-
± 0.5% ± 10 ms
See table 89, table 90 and
table 91
± 2.0 degrees
± 2.0 degrees
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