Sensitive Directional Residual Overcurrent And Power Protection Sdepsde; Identification; Functionality - ABB REG650 Technical Manual

1MRK 502 034-UEN -
7.3
7.3.1
7.3.2
Technical Manual
Function
Inverse characteristics, see
table 481, table 482 and table
Minimum polarizing voltage
Minimum polarizing current
Real part of source Z used for
current polarization
Imaginary part of source Z used
for current polarization
Operate time, non-directional
start function
Reset time, non-directional start
function
Operate time, directional start
function
Reset time, directional start
function
Sensitive directional residual overcurrent and power
protection SDEPSDE

Identification

Function description
Sensitive directional residual over
current and power protection

Functionality

In isolated networks or in networks with high impedance earthing, the earth fault
current is significantly smaller than the short circuit currents. In addition to this, the
magnitude of the fault current is almost independent on the fault location in the
network. The protection can be selected to use either the residual current or
residual power component 3U
available one non-directional 3I
tripping step.
Range or value
17 curve types
483
UBase
(1–100)% of
(2-100)% of IBase
(0.50-1000.00) W/phase
(0.50–3000.00) W/phase
30 ms typically at 0.5 to 2 x I
30 ms typically at 2 to 0.5 x I
30 ms typically at 0,5 to 2 x I
30 ms typically at 2 to 0,5 x I
IEC 61850
identification
SDEPSDE
·cos j, for operating quantity. There is also
·3I
0 0
step and one non-directional 3U
0
Section 7
Current protection
Accuracy
See table 481, table 482
table 483
± 0.5% of U
r
±1.0% of I
r
-
-
-
set
-
set
-
N
-
N
IEC 60617 ANSI/IEEE C37.2
identification device number
- 67N
overvoltage
0
and
165