# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
ZLF 0 0 0 0 0 0

Distance Protection

Final Order Code
ZLF 0 0 0 0 0 0
  • DI
  • DO
  • HSHD DO
  • AI (-5 - +20mA)
  • AI (0-300vDC)
  • CT
  • PT
  • Communication Protocol
  • Serial Ports
  • Ethernet Ports
ANSI Functions
21N Ground Distance Zones
21P Phase Distance Zones
50Sup Phase Overcurrent for Distance Supervision
50FD Fault Detector (sequence magnitudes)
Load Encroachment
68 / 78 Power Swing Blocking / Out of Step Tripping
50OF Close on Fault Detector
0 Remote Open Breaker Detector
50 Instantaneous Phase Overcurrent
51 Time-delayed Phase Overcurrent
50N Instantaneous Neutral Overcurrent (calculated IN)
51N Time-delayed Neutral Overcurrent (calculated IN)
50G Instantaneous Ground Overcurrent (measured IG)
51G Time-delayed Ground Overcurrent (measured IG)
50Q Instantaneous Negative Sequence Overcurrent
51Q Time-delayed Negative Sequence Overcurrent
67 Phase Directional
67N Neutral Directional
67G Ground Directional
67P Positive-Sequence Directional
67Q Negative Sequence Directional
0 Harmonic Blocking
0 Phase Selector
27 Phase Undervoltage
59 Phase Overvoltage
59N Neutral Overvoltage
64 Ground Overvoltage
47 Negative Sequence Overvoltage/td>
49 Thermal Image
81M Overfrequency
81m Underfrequency
81D Rate of Change of the Frequency
0 Load Shedding
46 Open Phase
50BF Breaker Failure Protection
0 Distance Protection Scheme
0 Overcurrent Protection Scheme
25 Synchrocheck
60VT Fuse Failure Detector
60VT VT Supervision
60CT CT Supervision
79 Recloser
0 Fault Locator
3 Coil Supervision
Breaker Supervision
2 Pole Discrepancy
0 Trip Logic and Command
0 Open Pole Detector
0 Dead Line Detector
0 Saturation Detector (for all current channels)
0 Calendar
Lian Electric