Siemens SIPROTEC 4 7SD80

Monitoring Functions
Measured Values
Current sum
Ι
F
= | Ι
A
+ Ι
B
+ Ι
C
+ k
Ι
· Ι
E
| >
SUM.I TRESHOLD · Ι
N
+ SUM.FACTORΙ ·Σ | Ι |
- SUM.ΙTRESHOLD for Ι
Nom
= 1 A
0.10 A to 2.00 A Increments 0.01 A
for Ι
Nom
= 5 A
0.50 A to 10.00 A Increments 0.01 A
- SUM.FACTORΙ
0.00 to 0.95 Increments 0.01
Current symmetry
| Ι
min
|/| Ι
max
| < BAL.FACTORΙ
as long as Ι
max
/Ι
N
> BAL.ΙLIMIT/Ι
N
- BAL.FACTORΙ
0.10 to 0.95 Increments 0.01
- BAL.ΙLIMIT for Ι
Nom
= 1 A
0.10 A to 1.00 A Increments 0.01 A
for Ι
Nom
= 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 Balance | V
min
|/| V
max
| < SYM.FAK.V
as long as | V
max
| > SYM.VGRENZ
- BAL.FACTORV 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/√3
non-symmetrical voltages
(Fuse-Failure-Monitor)
3 · V
0
> FFM V> ODER 3 · V
2
> FFM V>
AND at the same time
3 · Ι
0
< FFM Ι< AND 3 · Ι
2
< FFM Ι<
- FFM V> 10 V to 100 V Increments 1 V
- FFM Ι< for Ι
Nom
= 1 A
0.10 A to 1.00 A Increments 0.01 A
for Ι
Nom
= 5 A
0.50 A to 5.00 A Increments 0.01 A
three-phase measuring voltage failure
(Fuse-Failure-Monitor)
all V
Ph-E
< FFM VMESS <
AND at the same time
all ΔΙ
Ph
< FFM Ι
delta
AND
all Ι
Ph
> (Ι
Ph
> (Dist.))
OR
all V
Ph-E
< FFM VMESS <
AND at the same time
alle Ι
Ph
< (Ι
Ph
> (Dist.))
AND
alle Ι
Ph
> 40 mA
- FFM VMEAS < 2 V to 100 V Increments 1 V
4.15
Technical Data
4.15 Monitoring Functions
284 SIPROTEC 4, 7SD80, Manual
E50417-G1100-C474-A2, Edition 02.2018