Technical Data - ABB RELION Series Technical Manual

1MRS758755 A
4.2.7.9
4.3
4.3.1
4.3.1.1
4.3.1.2
4.3.1.3
REC615 and RER615
Technical Manual

Technical data

Table 392: MFADPSDE Technical data
Characteristic
Operation accuracy
1)
Start time
Reset time
Operate time accuracy
1) Includes the delay of the signal output contact, results based on statistical distribution of 1000
measurements
Unbalance protection
Negative-sequence overcurrent protection NSPTOC
Identification
Function description
Negative-sequence overcurrent
protection
Function block
A070758 V1 EN
Figure 205: Function block
Functionality
The negative-sequence overcurrent protection function NSPTOC is used for
increasing sensitivity to detect single-phase and phase-to-phase faults or unbalanced
loads due to, for example, broken conductors or unsymmetrical feeder voltages.
NSPTOC can also be used for detecting broken conductors.
Protection functions
Value
Depending on the frequency of the measured
voltage:
f ±2 Hz
n
±1.5% of the set value or ±0.002 × U
Typically 35 ms
Typically 40 ms
±1.0% of the set value or ±20 ms
IEC 61850 IEC 60617
identification identification
NSPTOC I2>
Section 4
n
ANSI/IEEE C37.2
device number
46
395