ABB RED650 Technical Manual page 116

Section 6
Differential protection
110
Function
Unrestrained limit function
Second harmonic blocking
Fifth harmonic blocking
*Inverse characteristics, see table
661,663 and table 665
Critical impulse time
Charging current compensation
LT3CPDIF (With in-zone transformer enabled and tIdMinHigh set to 0) :
*Operate time, restrained function at 0
to 10 x I Min
d
*Reset time, restrained function at 10 x
I Min to 0
d
*Operate time, unrestrained function at
0 to 10 x I Unre
d
*Reset time, unrestrained function at 10
x I Unre to 0
d
**Operate time, unrestrained negative
sequence function
**Reset time, unrestrained negative
sequence function
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.
Range or value
IBase
(100–5000)% of
(5.0–100.0)% of fundamental
(5.0–100.0)% of fundamental
16 curve types
2ms typically at 0 to 10 x I Min
d
On/Off
Min. = 25 ms
Max. = 35 ms
Min. = 5 ms
Max. = 15 ms
Min. = 5 ms
Max. = 15 ms
Min. = 15 ms
Max. = 30 ms
Min. = 10 ms
Max. = 25 ms
Min. = 10 ms
Max. = 30 ms
Line differential protection RED650 2.2 IEC
1MRK 505 394-UEN A
Accuracy
±1.0% of I at I ≤ I
r r
±1.0% of I at I > I
r
±1.0% of I
r
Note: fundamental
magnitude = 100% of
I
r
±2.0% of I
r
Note: fundamental
magnitude = 100% of
I
r
See table 661,663
and table 665
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Technical manual