Technical data

Siemens SIP · 2008
12 Motor Protection / 7SK80
12
Technical Data page 10
Technical data
Long-term averages
Time window 5, 15, 30 or 60 minutes
Frequency of updates Adjustable
Long-term averages
of currents
of active power
of reactive power
of apparent power
I
Admd
, I
Bdmd
, I
Cdmd
(I
L1dmd
, I
L2dmd
, I
L3dmd
) I
1dmd
in A (kA)
P
dmd
in W (kW, MW)
Q
dmd
in VAr (kVAr, MVAr)
S
dmd
in VAr (kVAr, MVAr)
Max./Min. report
Report of measured values With date and time
Reset, automatic Time of day adjustable (in minutes,
0 to 1439 min)
Time frame and starting time adjust
-
able (in days, 1 to 365 days, and ∞)
Reset, manual Using binary input,
using keypad,
via communication
Min./Max. values for current I
A(L1)
, I
B(L2)
, I
C(L3)
I
1
(positive-sequence component)
Min./Max. values for voltages V
A-N
, V
B-N
, V
C-N
(V
L1-E
, V
L2-E
, V
L3-E
)
V
1
(positive-sequence component)
V
A-B
, V
B-C
, V
C-A
(V
L1-L2
, V
L2-L3
, V
L3-L1
)
Min./Max. values for power S, P, Q, cos ϕ,frequency
Min./Max. values for overload
protection
Θ/Θ
Trip
Min./Max. values for mean values I
Admd
, I
Bdmd
, I
Cdmd
(I
L1dmd
, I
L2dmd
, I
L3dmd
)
I
1
(positive-sequence component);
S
dmd
, P
dmd
, Q
dmd
Local measured values monitoring
Current asymmetry I
max
/I
min
> balance factor,
for I>I
balance limit
Voltage asymmetry V
max
/V
min
> balance factor,
for V>V
lim
Current sum ⏐i
A
+ i
B
+ i
C
+k
J
· i
N
⏐> limit value
Current phase sequence Clockwise (ABC) / counter-clockwise
(ACB)
Voltage phase sequence Clockwise (ABC) / counter-clockwise
(ACB)
Limit value monitoring I
A
> limit value I
Admd
>
I
B
> limit value I
Bdmd
>
I
C
> limit value I
Cdmd
>
I
1
> limit value I
1dmd
>
I
L
< limit value I
L
<
cos ϕ <lowerlimitvalue⏐cos ϕ⏐<
P > limit value of active power
⏐P
dmd
⏐>
Q > limit value of reactive power
⏐Q
dmd
⏐>
S > limit value of apparent power
⏐S
dmd
⏐>
Fault event recording
Recording of indications of the last
8 power system faults
Recording of indications of the last
3 power system ground faults
Time stamping
Resolution for event log
(operational annunciations)
1ms
Resolution for trip log
(fault annunciations)
1ms
Maximum time deviation
(internal clock)
0.01 %
Battery Lithium battery 3 V/1 Ah,
type CR 1/2 AA, message “Battery
Fault” for insufficient battery charge
Oscillographic fault recording
Maximum 8 fault records saved,
memory maintained by buffer bat
-
tery in case of loss of power supply
Recording time 5 s per fault record, in total up to 18 s
Sampling rate for 50 Hz
Sampling rate for 60 Hz
1 sample/1.00 ms
1 sample/0.83 ms
Energy/power
Meter values for power Wp, Wq
(active and reactive power demand)
inkWh(MWhorGWh)andkVARh
(MVARh or GVARh)
Tolerance*) w 2%forI >0.1I
nom
, V >0.1V
nom
and ⏐cos ϕ⏐ (p.f.) W 0.707
Motor statistics
Total number of motor start-ups
Total operating time
Total down-time
Ratio operating time/down-time
Active energy and reactive energy
Motor start-up data:
–Start-uptime
– Start-up current (primary)
– Start-up voltage (primary)
0 to 9999 (resolution 1)
0 to 99999 h (resolution 1 h)
0 to 99999 h (resolution 1 h)
0 to 100 % (resolution 0.1 %)
See operational measured values
Of the last 5 start-ups
0.30 s to 9999.99 s (resolution 10 ms)
0 A to 1000 kA (resolution 1 A)
0 V to 100 kV (resolution 1 V)
Switching statistics
Saved number of trips Up to 9 digits
Accumulated interrupted current
(segregated acc. to pole)
Up to 4 digits
Operating hours counter
Display range
Criterion
Up to 7 digits
Overshoot of an adjustable current
threshold
(element 50-1, BkrClosed I
MIN
)
Circuit-breaker monitoring
Calculation methods
Measured-value acquisition/
processing
Evaluation
Saved number of statistical values
On r.m.s.-value basis:
ΣI, ΣI
x
,2P
On instantaneous value basis:
i
2
t
Phase-selective
One limit value each per subfunction
Up to 13 digits
Trip circuit monitoring
With one or two binary inputs
Commissioning aids
Phase rotation test, operational
measured values, circuit-breaker
test by means of control function,
creation of a test fault report,
creation of messages
*) With rated frequency.