Siemens SIPROTEC 4 7VK61 - Monitoring Functions

Monitoring Functions
Measured values
Current sum
Ι
F
= | Ι
L1
+ Ι
L2
+ Ι
L3
+ k
Ι
· Ι
E
| >
SUM.I Threshold · Ι
N
+ SUM.FACTORΙ ·Σ | Ι |
- SUM.ΙLimit for Ι
N
= 1 A
0.05 A to 2.00 A Increments 0.01 A
for Ι
N
= 5 A
0.25 A to 10.00 A Increments 0.01 A
- SUM.FACTORΙ
0.00 to 0.95 Increments 0.01
Voltage sum U
F
= | U
L1
+ U
L2
+ U
L3
+ k
U
· U
EN
| > 25 V
Current Symmetry
| Ι
min
|/| Ι
max
| < BAL.FACTOR.Ι
as long as Ι
max
/Ι
N
> BAL.ΙLIMIT/Ι
N
- BAL.FACTOR.Ι
0.10 to 0.95 Increments 0.01
BAL.ΙLIMIT for Ι
N
= 1 A
0.10 A to 1.00 A Increments 0.01 A
for Ι
N
= 5 A
0.50 A to 5.00 A Increments 0.01 A
T BAL.ΙLIMIT
5 s to 100 s Increments 1 s
Broken conductor One conductor without current, the others with current
(monitoring of current transformer circuits on current step
change in one phase without residual current)
Voltage Symmetry | U
min
|/| U
max
| < BAL.FACTOR.U
as long as | U
max
| > BAL.ULIMIT
- BAL.FACTORU 0.58 to 0.95 Increments 0.01
- BAL.ULIMIT 10 V to 100 V Increments 1 V
- T BAL.ULIMIT 5 s to 100 s Increments 1 s
Voltage phase sequence U
L1
before U
L2
before U
L3
as long as | U
L1
|. | U
L2
| . | U
L3
| > 40 V/√3
Non-symmetrical voltages
(Fuse failure monitoring)
3 · U
0
> FFM U> or 3 · U
2
> FFM U>
and at the same time
3 · Ι
0
< FFM Ι<
and 3 · Ι
2
< FFM Ι<
- FFM U> 10 V to 100 V Increments 1 V
- FFM Ι< for Ι
N
= 1 A
0.10 A to 1.00 A Increments 0.01 A
for Ι
N
= 5 A
0.50 A to 5.00 A Increments 0.01 A
Three-phase measuring voltage failure
(Fuse failure monitoring)
all U
Ph-E
< FFM UMEAS <
and at the same time
all ΔΙ
Ph
< FFM Ι
delta
and
all Ι
Ph
> (Ι
Ph
> (Dist.))
- FFM UMEAS < 2 V to 100 V Increments 1 V
- FFM Ι
delta
for Ι
N
= 1 A
0.05 A to 1.00 A Increments 0.01 A
for Ι
N
= 5 A
0.25 A to 5.00 A Increments 0.01 A
- T U SUPERVISION (wait time for additional measured
voltage failure monitoring)
0.00 s to 30.00 s Increments 0.01 s
- T U mcb 0 ms to 30 ms Increments 1 ms
Phase angle positive sequence power Message when the angle lies inside the area of the P-Q level
parameterised by φA and φB
- φA, φB 0° to 259° Increments 1°
4.7
Technical Data
4.7 Monitoring Functions
248 SIPROTEC 4, 7VK61, Manual
C53000-G1176-C159-5, Edition 05.2018