Technical Data
4.20 Additional Functions
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A4, Release date 08.2010
393
Energy Counter
1)
At nominal frequency
Switching statistics
Motor Statistics
Operating Hours Counter
Circuit Breaker Monitoring
Trip Circuit Monitoring
Meter Values for Energy
Wp, Wq (real and reactive energy)
in kWh (MWh or GWh) and in kVARh (MVARh or GVARh)
Range
Tolerance
1)
28 bit or 0 to 2 68 435 455 decimal for IEC 60870-5-103 (VDEW protocol)
31 bit or 0 to 2 147 483 647 decimal for other protocols (other than VDEW)
≤ 2 % for I > 0.1 I
Nom
, V > 0.1 V
Nom
and
|cosϕ | ≥ 0.707
Stored number of trips up to 9 decimal places
Accumulated interrupted current (separate for each
breaker pole)
up to 4 decimal places
Total number of motor startups 0 to 9999 Resolution1
Total operating time 0 to 99999 h Resolution1 h
Total down-time 0 to 99999 h Resolution1 h
Ratio operating time / down-time 0 to 100 % Resolution 0.1 %
Active energy and reactive energy (see Operational Measured Values)
Motor start-up data:
- Start-up time
- Start-up current (primary)
- Start-up voltage (primary)
of the last 5 start-ups
0.30 s to 9999.99 s
0 A to 1000 kA
0 V to 100 kV
Resolution 10 ms ...
Resolution1 A
Resolution1 V
Display Range Up to 7 digits
Criterion Overshoot of an adjustable current threshold (element 50-1, BkrClosed I MIN)
Calculation method on r.m.s. value basis: ΣI, ΣI
x
, 2P;
on instantaneous value basis: I
2
t
Measured value acquisition/processing phase-selective
Evaluation one limit value each per subfunction
Saved number of statistical values up to 13 decimal places
With one or two binary inputs.
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