ABB REG630 - Page 35

Table 53. Transformer differential protection for two-winding transformers (TR2PTDF) main settings
Parameter Function Value (Range) Step
Restraint mode TR2PTDF 2.h & 5.h & wav
Waveform
2.h & waveform
5.h & waveform
-
High operate value TR2PTDF 500...3000% 10
Low operate value TR2PTDF 5...50% 1
Slope section 2 TR2PTDF 10...50% 1
End section 2 TR2PTDF 100...500% 1
Start value 2.H TR2PTDF 7...20% 1
Start value 5.H TR2PTDF 10...50% 1
Winding 1 type TR2PTDF Y
YN
D
Z
ZN
-
Winding 2 type TR2PTDF Y
YN
D
Z
ZN
-
Zro A elimination TR2PTDF Not eliminated
Winding 1
Winding 2
Winding 1 and 2
-
Clock number TR2PTDF Clk Num 0
Clk Num 1
Clk Num 2
Clk Num 4
Clk Num 5
Clk Num 6
Clk Num 7
Clk Num 8
Clk Num 10
Clk Num 11
-
Table 54. High-impedance or flux-balance based differential protection for machines (MHZPDIF)
Characteristic
Value
Operation accuracy ±1.5% of the set value or 0.002 × I
n
Start time
1)2)
Typically 15 ms (±10 ms)
Reset time <65 ms
Reset ratio Typically 0.96
Retardation time <50 ms
Operate time accuracy in definite time mode ±1.0% of the set value of ±20 ms
1) F
n
= 50 Hz, results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
Generator Protection and Control
1MRS757583 C
REG630
Product version: 1.3
ABB 35