relationship of make-break operations and tripping current. The two vertices of this characteristic in a double
logarithmic scale are decisive for the setting of addresses 260 to 263:
Point P1 is determined by the number of permitted make-break operations (parameter 261 OP.CYCLES AT
Ir) for rated operational current Ιr (parameter 260 Ir-52)
Point P2 is determined by the maximum number of make-break operations (parameter 263 OP.CYCLES Isc)
for rated fault tripping current Ιsc (parameter 262 Isc-52).
For the procedure to operate correctly, the time response of the circuit breaker must be specified in parame-
ters 266T 52 BREAKTIME and 267T 52 OPENING.
Ι
2
t-Procedure
The Ι
2
t-procedure is activated via configuration parameter 172 52 B.WEAR MONIT. The square fault current
integrals are referred to the squared device nominal current. For purposes of determining the arc time, the
device must be informed of the CB tripping time T 52 BREAKTIME as well as the CB opening time T 52
OPENING of the circuit breaker. For recognition of the last zero crossing (arc deletion) of the currents after
tripping, the “Current-zero” Criterion is required.
Information List
No. Information Type of
Informa-
tion
Comments
- #of TRIPs= PMV Number of TRIPs=
409 >BLOCK Op Count SP >BLOCK Op Counter
1020 Op.Hours= VI Counter of operating hours
1021 Σ Ia = VI Accumulation of interrupted current Ph A
1022 Σ Ib = VI Accumulation of interrupted current Ph B
1023 Σ Ic = VI Accumulation of interrupted current Ph C
2896 79 #Close1./3p= VI No. of 1st AR-cycle CLOSE commands,3pole
2898 79 #Close2./3p= VI No. of higher AR-cycle CLOSE commands,3p
16001 ΣI^x A= VI Sum Current Exponentiation Ph A to Ir^x
16002 ΣI^x B= VI Sum Current Exponentiation Ph B to Ir^x
16003 ΣI^x C= VI Sum Current Exponentiation Ph C to Ir^x
16006 Resid.Endu. A= VI Residual Endurance Phase A
16007 Resid.Endu. B= VI Residual Endurance Phase B
16008 Resid.Endu. C= VI Residual Endurance Phase C
16011 mechan.TRIP A= VI Number of mechanical Trips Phase A
16012 mechan.TRIP B= VI Number of mechanical Trips Phase B
16013 mechan.TRIP C= VI Number of mechanical Trips Phase C
16014 ΣI^2t A= VI Sum Squared Current Integral Phase A
16015 ΣI^2t B= VI Sum Squared Current Integral Phase B
16016 ΣI^2t C= VI Sum Squared Current Integral Phase C
Measurement
A series of measured values and the values derived from them are constantly available for call up on site, or
for data transfer.
Applications
•
Information on the actual status of the system
•
Conversion of secondary values to primary values and percentages
2.23.2.4
2.23.3
Functions
2.23 Auxiliary Functions
288 SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017
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