ABB RED670 - Verifying Analog Primary and Secondary Measurement

Table 91. Three phase overcurrent LCP3PTOC
Function Range or value Accuracy
Operate value, overcurrent (5-2500)% of IBase ±1.0% of I
r
at I ≤ I
r
±1.0% of I at I > I
r
Reset ratio, overcurrent > 95% at (50-2500)% of IBase -
Start time at 0 to 2 x I
set
Min. = 10 ms
Max. = 25 ms
-
Reset time at 2 to 0 x I
set
Min. = 20 ms
Max. = 35 ms
-
Critical impulse time, overcurrent 5 ms typically at 0 to 2 x I
set
2 ms typically at 0 to 10 x I
set
-
Impulse margin time, overcurrent 10 ms typically -
Independent time delay to operate at 0 to 2 x I
set
(0.000-60.000) s ±0.2% or ±30 ms whichever is
greater
Table 92. Three phase undercurrent LCP3PTUC
Function
Range or value Accuracy
Operate value, undercurrent (1.00-100.00)% of IBase ±1.0% of I
r
Reset ratio, undercurrent < 105% at (50.00-100.00)% of IBase -
Start time at 2 to 0 x I
set
Min. = 15 ms
Max. = 30 ms
-
Reset time at 0 to 2 x I
set
Min. = 10 ms
Max. = 25 ms
-
Critical impulse time, undercurrent 10 ms typically at 2 to 0 x I
set
-
Impulse margin time, undercurrent 10 ms typically -
Independent time delay to operate at 2 to 0 x I
set
(0.000-60.000) s ±0.2% or ±45 ms whichever is
greater
1MRK 505 346-BEN -
Line differential protection RED670 2.1 IEC
Product version: 2.1
ABB 93