Fuse Failure Monitor
Setting range of the displacement voltage 3V0
above which voltage failure is detected
10 - 100 V
Setting range of the ground current above which
no voltage failure is assumed
0.1 - 1 A for Ι
Bdmd
= 1 A
0.5 - 5A for Ι
Bdmd
= 5A
Setting range of the pickup threshold Ι> above
which no voltage failure is assumed
0.1 - 35 A for Ι
Bdmd
= 1 A
0.5 - 175 A for Ι
Bdmd
= 5A
Measuring voltage monitoring depends on the MLFB and configuration with measured
and calculated values V
N
and Ι
N
Broken-wire Monitoring 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 Value Monitoring
Current asymmetry
Ι
max
/Ι
min
> symmetry factor, for Ι > Ι
limit
Voltage asymmetry V
max
/V
min
> symmetry factor, for V > V
limit
Current sum | i
A
+ i
B
+ i
C
+ k
I
· i
E
| > limit value, with
Current phase sequence Clockwise (ABC) / counter-clockwise (ACB)
Voltage phase sequence Clockwise (ABC) / counter-clockwise (ACB)
Fault Logging
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 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
maximum of 8 fault records saved; memory maintained by buffer battery in the case of auxiliary voltage
failure
Recording time 5 s per fault record, in total up to 18 s at 50 Hz
(max. 15 s at 60 Hz)
Intervals at 50 Hz
Intervals at 60 Hz
1 instantaneous value each per 1.0 ms
1 instantaneous value each per 0.83 ms
Energy Counter
Meter Values for Energy
Wp, Wq (real and reactive energy)
in kWh (MWh or GWh) or in kVARh (MVARh or GVARh)
Technical Data
4.23 Auxiliary Functions
418 SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017
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