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

Technical Data

4.4 Time Overcurrent Protection for Residual Current

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