Table 41. Phase discontinuity protection (PDNSPTOC)
Characteristic
Value
Operation accuracy
At the frequency f = f
n
±2% of the set value
Start time
Typical 15 ms
Reset time
< 40 ms
Reset ratio
Typical 0.96
Retardation time
< 35 ms
Operate time accuracy in definite time mode
±1.0% of the set value or ±20 ms
Suppression of harmonics
DFT: -50dB at f = n x f
n
, where n = 2, 3, 4, 5,
…
Table 42. Phase discontinuity protection (PDNSPTOC) main settings
Parameter
Function
Value (Range)
Step
Start value (Current
ratio setting I
2
/I
1
)
PDNSPTOC
10...100 %
1
Operate delay time
PDNSPTOC
0.100...30.000 s
0.001
Min phase current
PDNSPTOC
0.05...0.30 pu
0.01
Table 43. Three-phase inrush current detection (INRPHAR)
Characteristic
Value
Operation accuracy
At the frequency f = f
n
Current measurement:
±1.5% of the set value or ±0.002 x I
n
Ratio I2f/I1f measurement:
±5.0% of the set value
Reset time
+35 ms / -0 ms
Reset ratio
Typical 0.96
Operate time accuracy
+30 ms / -0 ms
Feeder Protection and Control
1MRS756380 A
REF630
Product version: 1.0
Issued: 15.09.2009
ABB
37
Summary of Contents for REF630
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