ABB Relion 650 Series Product Manual page 50

Transformer protection RET650
Version 2.2
Differential protection
Table 27. Transformer differential protection T2WPDIF/T3WPDIF
Function
Operating characteristic
Reset ratio
Unrestrained differential current limit
Minimum pickup
Minimum negative sequence current
Operate angle, negative sequence
Second harmonic blocking
Fifth harmonic blocking
Connection type for each of the
windings
Phase displacement between high
voltage winding, W1 and each of the
windings, W2 and W3. Hour notation
Operate time, restrained function
*Operate time at 0 to 10 x IdMin,
restrained function
Reset time, restrained function
*Reset time at 10 x IdMin to 0,
restrained function
Operate time, unrestrained function
*Operate time at 0 to 10 x Idunre,
unrestrained function
Reset time, unrestrained function
*Reset time at 10 x Idunre to 0,
unrestrained function
**Operate time, unrestrained negative
sequence function
**Reset time, unrestrained negative
sequence function
Critical impulse time
*Note: Data obtained with single three-phase input current group.
**Note: Data obtained with two three-phase 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.
50
M13046-1 v15
Range or value
Adaptable
> 94%
(1.00-50.00)xIBase on high voltage
winding
(0.05 - 0.60) x IBase
(0.02 - 0.20) x IBase
(30.0 - 90.0) degrees
(5.0-100.0)% of fundamental
differential current
(5.0-100.0)% of fundamental
differential current
Y or D
0–11
25 ms typically at 0 to 5 x set level
Min. = 25 ms
Max. = 35 ms
25 ms typically at 5 x set level to 0
Min. = 5 ms
Max. = 15 ms
20 ms typically at 0 to 5 x set level
Min. = 5 ms
Max. = 15 ms
25 ms typically at 5 x set level to 0
Min. = 15 ms
Max. = 35 ms
Min. = 10 ms
Max. = 20 ms
Min. = 10 ms
Max. = 30 ms
2 ms typically at 0 to 5 x IdMin
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Accuracy
±1.0% of Ir at I ≤ Ir
±1.0% of I at I > Ir
-
±1.0% of set value
±1.0% of I r
±1.0% of Ir
±1.0 degrees
±1.0% of I
r
Note: fundamental magnitude = 100% of I
±5.0% of I
r
Note: fundamental magnitude = 100% of I
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1MRK 504 172-BEN G
r
r
Hitachi Power Grids