Differential Relays - SIPROTEC

Differential Relays
Technical data (continued)
Setting ranges
Overcurrent protection definite–time
6
7SD503 Line differential protection with three pilot–wires
Overcurrent pulsating current �M1>
High current pulsating current �M1>>
Delay times
Tolerances
Response value for current
Timing interval
Release time
Overcurrent protection inverse–time Overcurrent pulsating current �M1>
Time multiplier tp
Energizing threshold
Characteristic to IEC 255–4, Section 3.5.2 or BS 142
Linear measuring range
Tolerances
Energizing threshold
Time interval
Measurement Operating currents
Measuring range
Tolerances
Overload protection values
Winding temperature
Measuring range
Tolerances
�M1/�N = 0.1 to 30
�n1/�N = 0.1 to 30
0 to 32 s or inactive
�5 % from set value
�1 % or �10 ms
approx. 30 ms
�p/�N = 0.1 to 20
0.05 to 32 s
1.06 x �p
Normal, strong or extremely dependent
40 x �N
�5 %
�5 % for 2 (�/�p>) �20
and tp = 1 or 30 ms
�M1, �M2, �M3, �diff, �stab
0 to 240 % �N
�2 % from rated value of the local station
+ 0.5 % /km pilot–wire
�/�trip calculated
0 to 240 %
�3 % with respect to �trip
Fault logging Fault indication Storage of the last 8 faults
Fault recording Line currents (instantaneous values)
Time resolution of the instantaneous values
Max. number of recordings
Start signal
�M1, �M2, �M3, �diff, �stab
1.66 at fN = 50 Hz
1.39 at fN = 60 Hz
8 in 19 s recording buffer
Energizing, PC/LSA operation, tripping,
binary input
Siemens LSA 2.2.2 . March 1997