Siemens SIPROTEC 7SD80 - Monitoring Functions

Technical Data
4.15 Monitoring Functions
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
319
4.15 Monitoring Functions
Measured Values
Current sum I
F
= | I
A
+ I
B
+ I
C
+ k
I
· I
G
| >
SUM.I Threshold · I
N
+ SUM.FactorI ·Σ | I |
- SUM.ILimit for I
Nom
= 1 A 0.10 A to 2.00 A Increments 0.01 A
for I
Nom
= 5 A 0.50 A to 10.00 A Increments 0.01 A
- SUM.FACTOR I 0.00 to 0.95 Increments 0.01
Current symmetry | I
min
|/| I
max
| < BAL.FACTOR.I
as long as I
max
/I
N
> BAL.ILIMIT/I
N
- BAL.FACTOR.I 0.10 to 0.95 Increments 0.01
- BAL.ILIMIT for I
Nom
= 1 A 0.10 A to 1.00 A Increments 0.01 A
for I
Nom
= 5 A 0.50 A to 5.00 A Increments 0.01 A
- T BAL.ILIMIT 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 Balance | V
min
|/| V
max
| < BAL.FACTOR.V
as long as | V
max
| > BAL.VLIMIT
- BAL.FACTOR.V 0.58 to 0.95 Increments 0.01
- BAL.VLIMIT 10 V to 100 V Increments 1 V
- T BAL.VLIMIT 5 s to 100 s Increments 1 s
Voltage phase sequence V
A
leads V
B
leads V
C
as long as | V
A
|, | V
B
| , | V
C
| > 40 V/v3
non-symmetrical voltages
(Fuse failure monitoring)
3 · V
0
> FFM V> OR 3 · V
2
> FFM V>
AND at the same time
3 · I
0
< FFM I< AND 3 · I
2
< FFM I<
- FFM V> 10 V to 100 V Increments 1 V
- FFM I<for I
Nom
= 1 A 0.10 A to 1.00 A Increments 0.01 A
for I
Nom
= 5 A 0.50 A to 5.00 A Increments 0.01 A
three-phase measuring voltage failure
(Fuse failure monitoring)
All V
Ph-G
< FFM VMEAS <
AND at the same time
all ΔI
Ph
< FFM I
delta
AND
All I
Ph
> (I
Ph
> (Dist.))
OR
All V
Ph-G
< FFM VMEAS <
AND at the same time
All I
Ph
< (I
Ph
> (Dist.))
AND
All I
Ph
> 40 mA
- FFM VMEAS < 2 V to 100 V Increments 1 V
- FFM I
delta
for I
Nom
= 1 A 0.05 A to 1.00 A Increments 0.01 A
for I
Nom
= 5 A 0.25 A to 5.00 A Increments 0.01 A
- T V-Monitoring (waiting time for additional measured
voltage failure monitoring)
0.00 s to 30.00 s Increments 0.01 s
- T VT mcb 0 ms to 30 ms Step 1 ms