ABB REF630 - Phase Discontinuity Protection (PDNSPTOC); Phase Discontinuity Protection (PDNSPTOC) Main Settings; Three-Phase Inrush Current Detection (INRPHAR)

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