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