ABB RELION 630 Series Product Manual page 34

Generator Protection and Control
REG630
Product version: 1.3
Table 50. Three-phase current inrush detection (INRPHAR)
Characteristic
Operation accuracy
Reset time
Reset ratio
Operate time accuracy
Table 51. Three-phase current inrush detection (INRPHAR) main settings
Parameter
Start value
Operate delay time
Table 52. Transformer differential protection for two-winding transformers (TR2PTDF)
Characteristic
Operation accuracy
1)2)
Operate time
Reset time
Reset ratio
Retardation time
Suppression of harmonics
1) Differential current before fault = 0.0 × I
2) Includes the delay of the output contact value and f
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Function
INRPHAR
INRPHAR
Biased low stage
Instantaneous high stage
, f = 50 Hz. Injected differential current = 2.0 × set operate value
n n
= 50 Hz
n
Value
At the frequency f = f
n
Current measurement:
±1.5% of the set value or ±0.002 × I
Ratio I2f/I1f measurement:
±5.0% of the set value
+35 ms / -0 ms
Typically 0.96
+30 ms / -0 ms
Value (Range)
5...100%
0.02...60.00 s
Value
At the frequency f = f
n
±1.5% of the set value or ±0.002 × I
Typically 35 ms (±5 ms)
Typically 17 ms (±5 ms)
<30 ms
Typically 0.96
<35 ms
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
1MRS757583 C
n
Step
1
0.001
n
ABB