Phase Discontinuity Protection Pdnsptoc - ABB RELION REC615 Technical Manual

1MRS758755 C
Characteristic
Operate time accuracy in inverse time mode
Suppression of harmonics
4.3.1.10 Technical revision history
Table 420: NSPTOC Technical revision history
Technical revision
B
C
D
E
4.3.2

Phase discontinuity protection PDNSPTOC

4.3.2.1 Identification
Function description
Phase discontinuity protection
4.3.2.2 Function block
Figure 206: Function block
4.3.2.3 Functionality
The phase discontinuity protection function PDNSPTOC is used for detecting
unbalance situations caused by broken conductors.
The function starts and operates when the unbalance current I
limit. To prevent faulty operation at least one phase current needs to be above the
minimum level. PDNSPTOC operates with DT characteristic.
The function contains a blocking functionality. It is possible to block the function
output, timer or the function itself, if desired.
3 Start value = 2.5 × I
Maximum
REC615 & RER615
Technical Manual
Value
±5.0% of the theoretical value or ±20 ms
DFT: -50 dB at f = n × f
IEC 61850
identification
PDNSPTOC
Start value multiples in range of 1.5...20
,
n
Protection functions
, where n = 2, 3, 4, 5,...
n
Change
Minimum and default values changed to 40
Operate delay time setting
ms for the
Step value changed from 0.05 to 0.01 for the
Time multiplier setting
Internal improvement
Internal Improvements
IEC 60617
identification
I2/I1>
/I
2
3
ANSI/IEEE C37.2
device number
46PD
exceeds the set
1
415