Technical Data; Stabilized And Instantaneous Differential Protection For Two- Winding Transformers Tr2Ptdf; Identification - ABB RELION REX640 Technical Manual

1MRS759142 C
4.3.1.11
4.3.2
4.3.2.1
REX640
Technical Manual
Name Type
IL3-diff:1 FLOAT32
IL1-bias:1 FLOAT32
IL2-bias:1 FLOAT32
IL3-bias:1 FLOAT32

Technical data

Table 579: LNPLDF Technical data
Characteristics
1)
Operation accuracy
2)3)
High stage, operate time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Operate time accuracy in inverse time mode
Suppression of harmonics
1) With the symmetrical communication channel (as when using dedicated fiber optic).
2) Without additional delay in the communication channel (as when using dedicated fiber optic).
3) Measured with static power output. When differential current = 2 ×
with galvanic pilot wire link + 5 ms.
Low operate value multiples in the range of 1.5...20
4)
Stabilized and instantaneous differential protection for two-
winding transformers TR2PTDF

Identification

Function description
Stabilized and instantaneous differential
protection for two-winding transformers
Protection functions
Values (Range) Unit
0.00...80.00
0.00...80.00
0.00...80.00
0.00...80.00
Value
Depending on the frequency of the measured
current: f ±2 Hz
n
Low stage
High stage
Minimum
20 ms
Typically 40 ms
Typically 0.96
<40 ms
±1.0% of the set value or ±20 ms
±5.0% of the set value or ±20 ms
RMS: No suppression
DFT: -50 dB at f = n × f
Peak-to-Peak: No suppression
High operate value and f
IEC 61850 IEC 60617
identification identification
TR2PTDF 3dI>T
Section 4
Description
Measured differential
current amplitude phase
IL3
Measured bias current
amplitude phase IL1
Measured bias current
amplitude phase IL2
Measured bias current
amplitude phase IL3
±2.5% of the set value
±2.5% of the set value
Typical Maximum
23 ms 27 ms
4)
, where n = 2, 3, 4, 5,...
n
= 50 Hz
n
ANSI/IEEE C37.2
device number
87T
591