Technical Revision History; Phase Discontinuity Protection Pdnsptoc; Identification; Function Block - ABB RELION 611 Series Technical Manual

Section 4
Protection functions
4.4.1.10
4.4.2
4.4.2.1
4.4.2.2
4.4.2.3
4.4.2.4
234

Technical revision history

Table 241: NSPTOC Technical revision history
Technical revision
B
C
D
E

Phase discontinuity protection PDNSPTOC

Identification

Function description
Phase discontinuity protection

Function block

A070688 V1 EN
Figure 110: Function block

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
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.

Operation principle

The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "On" and "Off".
Change
Minimum and default values changed to 40 ms for
Operate delay time setting
the
Step value changed from 0.05 to 0.01 for the
multiplier setting
Internal improvement
Internal Improvements
IEC 61850 IEC 60617
identification identification
PDNSPTOC I2/I1>
1MRS757454 D
Time
ANSI/IEEE C37.2
device number
46PD
/I exceeds the set limit.
2 1
611 series
Technical Manual