ABB RED650 - Page 116

Function Range or value Accuracy
Unrestrained limit function (100–5000)% of IBase ±1.0% of I
r
at I ≤ I
r
±1.0% of I at I > I
r
Second harmonic blocking (5.0–100.0)% of fundamental ±1.0% of I
r
Note: fundamental
magnitude = 100% of
I
r
Fifth harmonic blocking
(5.0–100.0)% of fundamental ±2.0% of I
r
Note: fundamental
magnitude = 100% of
I
r
*Inverse characteristics, see table
661,663 and table 665
16 curve types See table 661,663
and table 665
Critical impulse time 2ms typically at 0 to 10 x I
d
Min -
Charging current compensation On/Off -
LT3CPDIF (With in-zone transformer enabled and tIdMinHigh set to 0) :
*Operate time, restrained function at 0
to 10 x I
d
Min
Min. = 25 ms
Max. = 35 ms
-
*Reset time, restrained function at 10 x
I
d
Min to 0
Min. = 5 ms
Max. = 15 ms
-
*Operate time, unrestrained function at
0 to 10 x I
d
Unre
Min. = 5 ms
Max. = 15 ms
-
*Reset time, unrestrained function at 10
x I
d
Unre to 0
Min. = 15 ms
Max. = 30 ms
-
**Operate time, unrestrained negative
sequence function
Min. = 10 ms
Max. = 25 ms
-
**Reset time, unrestrained negative
sequence function
Min. = 10 ms
Max. = 30 ms
-
The data in the table are valid for a single IED with two local current input groups.
*Note: Data obtained with single input current group.
**Note: Data obtained with two input current groups. The rated symmetrical currents are applied on
both sides as pre- and after-fault currents. The fault is performed by increasing one phase current to
double on one side and decreasing same phase current to zero on the other side.
Section 6 1MRK 505 394-UEN A
Differential protection
110 Line differential protection RED650 2.2 IEC
Technical manual