Siemens siprotec 7SA6 - Monitoring Functions

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
|>25V
Current symmetry |
I
min
|/|I
max
|<BAL.FACTORI
as long as
I
max
/ I
N
>BAL.ILIMIT/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
|>40V/√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<
– FFMU> 10Vto100V (steps0.01V)
– 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
>40mA
– 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
=1A;forI
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)