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Technical Data
4.7 Time Overcurrent Protection
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
305
Inverse Time Elements (ANSI)
Pickup value 51-B PICKUP
(phases)
for
I
Nom
= 1 A
0.10 A to 4.00 A
or
∞
(ineffective)
Increments 0.01 A
for
I
Nom
= 5 A
0.50 A to 20.00 A
or
∞
(ineffective)
Pickup value 51N-B PICKUP
(ground)
for
I
Nom
= 1 A
0.05 A to 4.00 A
or
∞
(ineffective)
Increments 0.01 A
for
I
Nom
= 5 A
0.25 A to 20.00 A
or
∞
(ineffective)
Time multipliers
51-B TD ANSI
(phases)
0.50 s to 15.00 s
or
∞
(ineffective)
Increments 0.01 s
51N-B TD ANSI
(ground)
0.50 s to 15.00 s
or
∞
(ineffective)
Increments 0.01 s
Additional time delays
51-B AddT-DELAY
(phases)
0.00 s to 30.00 s
Increments 0.01 s
51N-B AddTdelay
(ground)
0.00 s to 30.00 s
Increments 0.01 s
Tolerances
Pickup, dropout thresholds
I
P
, 3
I
0P
3 % of setting value or 1 % of nominal current
Pickup time 2
≤
I
/
I
P
≤
20 and D
I
P
≥
1 s
Pickup time 2
≤
I
/3
I
0P
≤
20 and D
3
I
0P
≥
1 s
5 % of setting value
±
15 ms
5 % of setting value
±
15 ms
defined times
1 % of setting value or 10 ms
Pickup value 67-TOC PICKUP
(directional phases)
for
I
Nom
= 1 A
0.10 A to 4.00 A
or
∞
(ineffective)
Increments 0.01 A
for
I
Nom
= 5 A
0.50 A to 20.00 A
or
∞
(ineffective)
Pickup value 67N-TOC PICKUP
(Earth directional)
for
I
Nom
= 1 A
0.05 A to 4.00 A
or
∞
(ineffective)
Increments 0.01 A
for
I
Nom
= 5 A
0.25 A to 20.00 A
or
∞
(ineffective)
Time multipliers
(directional elements)
67-TOC TD ANSI
(phases)
0.50 s to 15.00 s
or
∞
(ineffective)
Increments 0.01 s
67N-TOC TD ANSI
(ground)
0.50 s to 15.00 s
or
∞
(ineffective)
Increments 0.01 s
Additional time delays
(directional elements)
67-TOC AddTDel.
(phases)
0.00 s to 30.00 s
Increments 0.01 s
67N-TOC AddTDel
(ground)
0.00 s to 30.00 s
Increments 0.01 s
Tolerances (directional elements)
Pickup, dropout thresholds
I
Pdir
, 3
I
0Pdir
3 % of setting value or 1 % of nominal current
Pickup time 2
≤
I
/
I
Pdir
≤
20 and D
I
Pdir
≥
1 s
Pickup time 2
≤
I
/3
I
0Pdir
≤
20 and D
3
I
0Pdir
≥
1 s
5 % of setting value
±
15 ms
5 % of setting value
±
15 ms
Characteristics
see Figure 4-4 and 4-5
defined times
1 % of setting value or 10 ms