Siemens siprotec 7SA522, Руководство пользователя

Страница: 543 / 628

Technical Data
10-27
7SA522 Manual
C53000-G1176-C119-2
approx. 20 ms after switch-on of
measured quantities after start
Drop-off time(overshoot time)
≤
8 ms for sinusoidal signals
≤
16 ms maximum
Delay times for all stages 0.00 s to 30.00 s;
∞
(steps 0.01 s)
Tolerance 1 % of the set value or 10 ms
Breaker Pole
Discrepancy
Monitoring Initiation criterion not all poles are closed or open
Monitoring time 0.00 s to 30.00 s;
∞
(steps 0.01 s)
Tolerance 1 % of the set value or 10 ms
10.16 Monitoring Functions
Measured Values Current sum I
F
= | I
L1
+ I
L2
+ I
L3
+ I4/Iph · I
E
| >
SUM.I Threshold · I
N
+ SUM.I factor· I
max
– SUM.I Threshold 0.05 A to 2.00 A
1)
(steps 0.01)
– SUM.I factor 0.00 to 0.95 (steps 0.01)
Voltage sum U
F
= |U
L1
+ U
L2
+ U
L3
+ Uph/Uen 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
1)
(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