SIPROTEC 4 7SA522 Distance Protection Relay for Transmission ...

Technical Function Data
Distance protection – ANSI 21, 21N
Fault locator
Distance zones
6, 1 as extended (overreach) zone
all zones may be set forward or/and reverse
or ineffective
Time stages
6 for multi-phase faults
3 for single-phase faults
Characteristic
(refer to ordering code)
selectable seperately for phase and
quadrilateral and/or
ground (earth) faults
MHO
Time range
0.00 to 30 s (step 0.01s) or deactivated
Line angle ϕ L
30° to 89° (step 1°)
Quadrilateral reactance reach X
0.05Ω to 250Ω (1A) / 0.01Ω to 50Ω (5A)
(step 0.01Ω)
Quadrilateral resistance reach R
for phase-to-phase faults and
0.05Ω to 250Ω (1A) / 0.01Ω to 50Ω (5A)
phase-to-ground (earth) faults
(step 0.01Ω)
MHO impedance reach ZR
0.05Ω to 200Ω (1A) / 0.01Ω to 40Ω (5A)
(step 0.01Ω)
Minimum phase current I
0.10A to 4A (1A) / 0.50A to 20A (5A)
(step 0.01A)
Ground- (Earth-) fault pickup
Neutral (residual) current 3 I 0
Zero sequence voltage 3V 0
Zero sequence compensation
selectable input formats
Seperately selectable for zones
0.05A to 4A (1A) / 0.25A to 20A (5A)
(step 0.01A)
1 to 100V (step 1V) or deactivated
RG/RL and XG/XL
k 0 and ϕ (k 0 )
Z1
higher zones
RG/RL and XG/XL - 0.33 to 7 (step 0.01)
k 0
0 to 4 (step 0.001)
ϕ (k 0 ) -135° to 135°
Parallel line mutual compensation
(refer to ordering code)
RM/RL and XM/XL 0.00 to 8 (step 0.01)
Load encroachment
Minimum load resistance
0.10Ω to 250Ω (1A) / 0.02Ω to 50Ω (5A)
(step 0.01Ω) or deactivated
Maximum load angle 20° to 60° (step 1°)
Directional decision for all types of faults
Directional sensitivity
Tolerances
Timer tolerance
Operating times
Minimum trip time
Reset time
with sound phase polarization and/or voltage
memory
dynamically unlimited
for sinusodial quantities
∆X
X ≤ 5% for 30° ≤ϕ scc ≤ 90°
∆R
R ≤ 5% for 0° ≤ϕ scc ≤ 60°
∆Z
Z
≤ 5% for -30° ≤(ϕ scc −ϕ line ) ≤+30°
± 1% of set value or 10ms
approx. 17ms at 50Hz
approx. 15ms at 60Hz
approx. 30ms
Output of the distance to fault
X, R (secondary) in Ω
X, R (primary) in Ω
distance in kilometers or miles
distance in % of line length
Start of calculation
with trip, with pickup reset
Reactance per unit length 0.005 to 6.5Ω /km (1A) / 0.001 to 1.3Ω /km (5A) or
0.005 to 10Ω / mile (1A) / 0.001 to 2Ω / mile (5A)
(step 0.001Ω / unit)
Tolerance
for sinusodial quantities
≤ 2.5% line length for 30° ≤ϕ scc ≤ 90° and
V scc /V N > 0.10
Siemens SIP 4.2 · 08/99 25