Siemens SIPROTEC 7SJ62 Manual page 534

Technical Data
4.25 Additional Functions
Broken-wire Supervision of Voltage Transformer Circuits
suited for single-, two- or three-pole broken-wire detection of voltage transformer circuits;
only for connection of phase-ground voltages
Local Measured Values Monitoring
Current Asymmetry
Voltage asymmetry
Total current, quick monitoring function with pro-
tection blockage
Current phase sequence
Voltage phase sequence
Limit value monitoring
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 Allocation
Resolution for Event Log (Operational Annun-
ciations)
Resolution for Trip Log (Fault Annunciations) 1 ms
Maximum Time Deviation (Internal Clock)
Battery
Fault Recording
maximum of 8 fault records saved; memory maintained by buffer battery in case of loss of power supply
Recording Time
Probing
534
/I > balance factor, for I > I
I
max min
V /V > balance factor, for V > V
max min
| i + i + i + i | > limit value
A B C N
Clockwise (ABC)/ counter-clockwise (ACB)
Clockwise (ABC)/ counter-clockwise (ACB)
I > limit value I
A Admd
> limit value I
I
B Bdmd
I > limit value I
C Cdmd
I > limit value I
1 1dmd
< limit value I <
I
L L
cos ϕ < lower limit | cos ϕ |<
P > limit value of active power | P
Q > limit value of reactive powe | Q
S > limit value of apparent power S
Druck < lower pressure limit<
Temperature > Temperature limit>
1 ms
0.01 %
Lithium battery 3 V/1 Ah, type CR 1/2 AA
Message „Battery Fault" for insufficient battery charge
Total 20 s
Pre-event and post-event recording and memory time adjustable
16 samples (instantaneous values) per cycle
C53000-G1140-C207-2, Release date 01.2008
limit
limit
>
>
>
>
| >
dmd
| >
dmd
>
dmd
SIPROTEC, 7SJ62/64, Manual