Siemens SIPROTEC 4 7UT6 Series - Time Overcurrent Protection for Residual Current

Time Overcurrent Protection for Residual Current
Characteristics
Definite-time stages DT
Ι
Ph
>>, 3Ι
0
>>, Ι
Ph
>, 3Ι
0
>
Inverse time stages
(acc. to IEC or ANSI)
IT
Ι
P
, 3Ι
0P
one of the tripping curves depicted in
Figure 4-7 to Figure 4-12 on the right-hand
side may be selected; alternatively user speci-
fied trip and reset characteristic
Reset characteristics
(with disk emulation)
IT For illustrations of possible reset time charac-
teristics see Figure 4-7 to Figure 4-12 on the
left-hand side.
Current Stages
High current stages
Ι
Ph
>>
0.10 A to 35.00 A
1)
or ∞ (ineffective)
Increments 0.01 A
T
ΙPh>>
0.00 s to 60.00 s
or ∞ (no trip)
Increments 0.01 s
3Ι
0
>>
0.10 A to 35.00 A
1)
or ∞ (ineffective)
Increments 0.01 A
T
3Ι0>>
0.00 s to 60.00 s
or ∞ (no trip)
Increments 0.01 s
Definite time current elements
(50Ns-2, 50Ns-1)
Ι
Ph
>
0.10 A to 35.00 A
1)
or ∞ (ineffective)
Increments 0.01 A
T
ΙPh>
0.00 s to 60.00 s
or ∞ (no trip)
Increments 0.01 s
3Ι
0
>
0.10 A to 35.00 A
1)
or ∞ (ineffective)
Increments 0.01 A
T
3Ι0>
0.00 s to 60.00 s
or ∞ (no trip)
Increments 0.01 s
Inverse current elements (51Ns-
IEC)
Ι
P
0.10 A to 4.00 A
1)
Increments 0.01 A
T
ΙP
0.05 s to 3.20 s
or ∞ (no trip)
Increments 0.01 s
3Ι
0P
0.05 A to 4.00 A
1)
Increments 0.01 A
T
3Ι0P
0.05 s to 3.20 s
or ∞ (no trip)
Increments 0.01 s
Inverse current elements (51Ns-
ANSI)
Ι
P
0.10 A to 4.00 A
1)
Increments 0.01 A
D
ΙP
0.50 s to 15.00 s
or ∞ (no trip)
Increments 0.01 s
3Ι
0P
0.05 A to 4.00 A
1)
Increments 0.01 A
D
3Ι0P
0.50 s to 15.00 s
or ∞ (no trip)
Increments 0.01 s
Tolerances with inverse time
2)
Currents 3 % of set value or 1 % rated current
Times 1 % of set value or 10 ms
4.4
Technical Data
4.4 Time Overcurrent Protection for Residual Current
416 SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016