Monitoring Functions - Siemens siprotec 7SD610 User Manual

Differential protection
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4 Technical Data
4.14

Monitoring Functions

Measured Values
Current sum
- SUM.ILimit
- SUM.FACTOR I
Voltage sum
Current Symmetry
- BAL.FACTOR.I
- BAL.ILIMIT
- T BAL.ILIMIT
Broken wire
Voltage balance
- BAL.FACTOR.U
- BAL.ULIMIT
- T BAL.ULIMIT
Voltage phase sequence
Asymmetrical measuring voltage failure
(Fuse Failure Monitor)
- FFM U>
- FFM I<
Three-phase measuring voltage failure
(Fuse Failure Monitor)
- FFM UMEAS <
- FFM I
delta
- T U Monitoring (waiting time for additional measured
voltage failure monitoring)
- T U T mcb
354
I
= | I
+ I
+ I
F
L1
L2
SUM.I Threshold · I
for I
= 1 A 0.10 A to 2.00 A
N
for I
= 5 A 0.50 A to 10.00 A
N
0.00 to 0.95
U
= | U
+ U
F
L1
L2
| I
|/| I
| < BAL.FACTOR.I
min
max
as long as I
max
0.10 to 0.95
for I
= 1 A 0.10 A to 1.00 A
N
for I
= 5 A 0.50 A to 5.00 A
N
5 s to 100 s
one conductor without current, the others with current
(monitoring of current transformer circuits on current step
change in one phase without residual current)
| U
|/| U
| < BAL.FACTOR.U
min
max
as long as | U
max
0.58 to 0.95
10 V to 100 V
5 s to 100 s
U
leads U
leads U
L1
L2
as long as | U
L1
3 · U
> FFM U> OR 3 · U
0
AND simultaneously
3 · I
< FFM I< AND 3 · I
0
10 V to 100 V
for I
= 1 A 0.10 A to 1.00 A
N
for I
= 5 A 0.50 A to 5.00 A
N
all U
< FFM UMEAS <
Ph-E
AND simultaneously
all ∆I
< FFM I
Ph
AND
all I
> (I
> (Dist.))
Ph
Ph
OR
all U
< FFM UMEAS <
Ph-E
AND simultaneously
all I
< (I
> (Dist.))
Ph
Ph
AND
all I
> 40 mA
Ph
2 V to 100 V
for I
= 1 A 0.05 A to 1.00 A
N
for I
= 5 A 0.25 A to 5.00 A
N
0.00 s to 30.00 s
0 ms to 30 ms
· I
+ k
| >
I
L3
E
+ SUM.FactorI ·Σ | I |
N
Increment 0.01 A
Increment 0.01 A
Increment 0.01
+ U
+ k
· U
| > 25 V
L3
U
EN
/I
> BAL.ILIMIT/I
N
N
Increment 0.01
Increment 0.01 A
Increment 0.01 A
Increments 1 s
| > BAL.ULIMIT
Increment 0.01
Increment 1 V
Increments 1 s
L3
|, | U
| , | U
| > 40 V/v3
L2
L3
> FFM U>
2
< FFM I<
2
Increments 1 V
Increment 0.01 A
Increment 0.01 A
delta
Increments 1 V
Increment 0.01 A
Increment 0.01 A
Increments 0.01 s
Increments 1 ms
7SD610 Manual
C53000-G1176-C145-4

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