Three-Phase Non-Directional Overcurrent Protection (Phxptoc) Main Settings; Three-Phase Directional Overcurrent Protection (Dphxpdoc) - ABB RET620 Product Manual

Transformer Protection and Control
RET620
Product version: 2.0
Table 30. Three-phase non-directional overcurrent protection (PHxPTOC) main settings
Parameter
Start Value
Time multiplier
Operate delay time
1)
Operating curve type
1) For further reference, see Operation characteristics table
Table 31. Three-phase directional overcurrent protection (DPHxPDOC)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Operate time accuracy in inverse time mode
Suppression of harmonics
Measurement mode and Pol quantity = default, current before fault = 0.0 x I
1)
random phase angle, results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
3) Maximum Start value = 2.5 x I ,
n
ABB
Function
PHLPTOC
PHHPTOC
PHIPTOC
PHLPTOC
PHHPTOC
PHLPTOC
PHHPTOC
PHIPTOC
PHLPTOC
PHHPTOC
PHIPTOC
DPHLPDOC
DPHHPDOC
I = 2.0 x set Start value
Fault
Start value multiples in range of 1.5 to 20
Value (Range)
0.05...5.00 x I
n
0.10...40.00 x I
n
1.00...40.00 x I
n
0.05...15.00
0.05...15.00
40...200000 ms
40...200000 ms
20...200000 ms
Definite or inverse time
Curve type: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19
Definite or inverse time
Curve type: 1, 3, 5, 9, 10, 12, 15, 17
Definite time
Value
Depending on the frequency of the current/voltage measured: f
Current:
±1.5% of the set value or ±0.002 x I
Voltage:
±1.5% of the set value or ±0.002 x U
Phase angle: ±2°
Current:
±1.5% of the set value or ±0.002 x I
(at currents in the range of 0.1...10 x I
±5.0% of the set value
(at currents in the range of 10...40 x I
Voltage:
±1.5% of the set value or ±0.002 x U
Phase angle: ±2°
Minimum
38 ms
< 40 ms
Typical 0.96
< 35 ms
±1.0% of the set value or ±20 ms
±5.0% of the theoretical value or ±20 ms
DFT: -50 dB at f = n x f
, voltage before fault = 1.0 x U , f = 50 Hz, fault current in one phase with nominal frequency injected from
n n n
1MRS757846 A
Step
0.01
0.01
0.01
0.01
0.01
10
10
10
n
n
n
)
n
)
n
n
Typical Maximum
43 ms 46 ms
3)
, where n = 2, 3, 4, 5,...
n
±2 Hz
n
27