Siemens siprotec 7SA6, Manual

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Technical Data
10-42
7SA6 Manual
C53000-G1176-C156
10.19 Monitoring Functions
Measured Values Current sum
I
F
= |
I
L1
+
I
L2
+
I
L3
+ k
I
·
I
E
|>
SUM.I Threshold · I
N
+ SUM.I factor· I
max
– SUM.I Threshold 0.05 A to 2.00 A (steps 0.01)
– SUM.I factor 0.00 to 0.95 (steps 0.01)
Voltage sum U
F
= |U
L1
+ U
L2
+ U
L3
+ k
U
U
EN
| > 25 V
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 (steps 0.01)
– BAL.I LIMIT 0.10 A to 1.00 A (steps 0.01 A)
Broken conductor one conductor without current,
the others with current
Voltage symmetry |U
min
| / |U
max
| < BAL.FACTOR U
as long as |Umax| > BAL.U LIMIT
– BAL.FACTOR U 0.58 to 0.95 (steps 0.01)
– BAL.U LIMIT 10 V to 100 V (steps 1 V)
Voltage phase rotation U
L1
before U
L2
before U
L3
as long as |U
L1
|, |U
L2
|, |U
L3
| > 40 V/
√
3
Fuse–Failure–Monitor 3·U
0
> FFM U> OR 3·U
2
> FFM U>
(non-symmetrical voltages) AND at the same time
3·I
0
< FFM I< AND 3·I
2
< FFM I<
– FFM U> 10 V to 100 V (steps 0.01 V)
– FFM I< 0.10·A to 1.00·A
1)
(steps 0.01·A)
Fuse–Failure–Monitor all U
Ph-E
< FFM U<max
(three-phase) AND at the same time
all
∆
I
Ph
< FFM Idelta
AND
all I
Ph
> (I
Ph
> (Dist.))
OR
all U
Ph-E
< FFM U<max
AND at the same time
all I
Ph
< (I
Ph
> (Dist.))
AND
all I
Ph
> 40 mA
– FFM U<max 2 V to 100 V (steps 1 V)
– FFM I
delta
0.05·A to 1.00·A
1)
(steps 0.01·A)
1
) Secondary values based on I
N
= 1 A; for I
N
= 5 A they must be multiplied by 5.
Trip Circuit
Supervision Number of monitored circuits 1 to 3
Operation with 1 binary input or with 2 binary inputs
Alarm delay 1 s to 30 s (steps 1 s)