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.Factor
I
·
Σ
|
I
|
- SUM.
I
Limit
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.
I
LIMIT/
I
N
- BAL.FACTOR.
I
0.10 to 0.95
Increments 0.01
- BAL.
I
LIMIT
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.
I
LIMIT
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
Δ
I
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
