Siemens SIPROTEC 4 7SJ61 - Page 337

Min/Max Values of the Overload Protection Θ/Θ
TRIP
Min/Max Values of Averages
Ι
Admd
; Ι
Bdmd
; Ι
Cdmd
;
Ι
1dmd
(positive sequence component);
Local Measured Values Monitoring
Current Asymmetry
Ι
max
/Ι
min
> balance factor, for Ι > Ι
limit
,
with settable delay time
Total current, quick monitoring function with
protection blockage
| i
A
+ i
B
+ i
C
+ k
Ι
· i
N
| > limit value
Current Phase Sequence Clockwise (ABC) / counter-clockwise (ACB)
Limit Value Monitorings
Ι
A
> limit value Ι
Admd
>
Ι
B
> limit value Ι
Bdmd
>
Ι
C
> limit value Ι
Cdmd
>
Ι
1
> limit value Ι
1dmd
>
Ι
L
< limit value Ι
L
<
Fault Event Recording
Recording of indications of the last 25 power system faults
Time Allocation
Resolution for Event Log (Operational Annunciations)
1 ms
Resolution for Trip Log (Fault Annunciations) 1 ms
Maximum Time Deviation (Internal Clock) 0.01 %
Battery Lithium battery 3 V/1 Ah, Typ CR 1/2 AA
Message “Battery Fault” for insufficient battery charge
Fault Recording
max. 8 fault records saved by buffer battery also in the event of auxiliary voltage failure
Recording Time Total 20 s
Pre-event and post-event recording and memory time adjust-
able
Probing 16 samples (instantaneous values) per cycle
Switching Statistics
Saved Number of Trips
up to 9 digits
Number of Automatic Reclosing Commands
(segregated according to 1st and ≥ 2nd cycle)
up to 9 digits
Accumulated Interrupted Current (segregated
according to pole)
up to 4 digits
Motor Statistics
Total number of motor startups
0 to 9999 Resolution 1
Total operating time 0 to 99999 h Resolution 1 h
Total down-time 0 to 99999 h Resolution 1 h
Ratio operating time / down-time 0 to 100 % Resolution 0,1 %
Active energy and reactive energy (see Operational Measured Values)
Technical Data
4.20 Auxiliary Functions
SIPROTEC 4, 7SJ61, Manual 337
C53000-G1140-C210-6, Edition 05.2016