Technical Data - ABB RELION REX640 Technical Manual

Section 5
Protection related functions
5.8.10
5.9
5.9.1
5.9.2
5.9.3
1132

Technical data

Table 1067: CVPSOF Technical data
Characteristic
Operation accuracy
Operate time accuracy
Suppression of harmonics
Local acceleration logic DSTPLAL
Identification
Function description
Local acceleration logic
Function block
GUID-37FBD1C2-1883-4A14-9954-6583BBA46930 V1 EN
Figure 611: Function block
Functionality
The local acceleration logic function DSTPLAL is a complementary function to the
distance protection function DSTPDIS. DSTPLAL is not intended for a stand-alone
use.
The main purpose of DSTPLAL is to achieve a fast fault clearing which is independent
of the fault location on the protected feeder when no communication channel is
available between the local and remote terminals. DSTPLAL enables a fast fault
clearing during certain conditions, but the function cannot completely replace the
communication scheme logic.
Value
Depending on the frequency of the voltage
measured: f ±2Hz
n
Current: ±1.5% of the set value or ±0.002 × I
Voltage: ±1.5% of the set value or ±0.002 × U
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × f
IEC 61850 IEC 60617
identification identification
DSTPLAL LAL
1MRS759142 C
n
n
, where n = 2, 3, 4, 5,...
n
ANSI/IEEE C37.2
device number
21LAL
REX640
Technical Manual