4 Protection Functions and Specifications
D02706R02.30
L-PRO 4000 User Manual
4-55
4.4 Fault Log
The L-PRO stores a log of faults in a 100 entry circular log. Each entry contains
the time of the fault, fault type, faulted phase, fault quantities as per the below
table. Fault log will be triggered only for trip condition and it won’t log for an
alarm condition.
The fault log can be viewed in three ways:
• Relay Front HMI
• Relay Control Panel interface is in the Events tab
Table 4.28: Fault Log
Fault Type
Fault Quantities
21P Phase Distance
- Fault Location
- Fault Impedance Magnitude and Angle
- Main VA/VB/VC Phasors
- “Line” IA/IB/IC Phasors
- Frequency
21N Ground Distance
- Fault Location
- Fault Impedance Magnitude and Angle
- Main VA/VB/VC Phasors
- “Line” IA/IB/IC Phasors
- Main Voltage Zero Sequence Phasor (3V0)
- “Line” Current Zero Sequence Phasor (3I0)
- Frequency
Distance Scheme Trip (POTT,
PUTT, DCB)
- Fault Location
- Fault Impedance Magnitude and Angle
- Main VA/VB/VC Phasors
- “Line” IA/IB/IC Phasors
- Main Voltage Zero Sequence Phasor (3V0)
- “Line” Current Zero Sequence Phasor (3I0)
- Frequency
59 Main Over voltage
27 Main Under voltage
- Main VA/VB/VC Phasors
59 Aux Over voltage
27 Aux Under voltage
- Aux VA/VB/VC Phasors
50LS Main
- I1A/I1B/I1C Phasors
50LS Aux
- I2A/I2B/I2C Phasors
50-67 Trip
51-67 Trip
- “Line” IA/IB/IC Phasors
50N-67 Trip
51N-67 Trip
- “Line” Current Zero Sequence Phasor (3I0)
46-50/67 Trip
46-51/67 Trip
- “Line” Current Negative Sequence Phasor (3I2)
Summary of Contents for L-PRO 4000
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