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

Differential Protection

Final Order Code
IDF 0 0 0 0 0 0 0
  • DI
  • DO
  • HSHD DO
  • AI (-5 - +20mA)
  • AI (0-300vDC)
  • CT
  • PT
  • REF Channels
  • Communication Protocol
  • Serial Ports
  • Ethernet Ports
ANSI Functions
87 Restrained Differential Unit
87/50 Unrestrained Differential Unit
87FD Fault Detector
50FD Fault Detector (sequence magnitudes)
87P External Fault 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
50 STUB STUB Bus Protection
50V Instantaneous Voltage Dependent Overcurrent
51V Time-delayed Voltage Dependent Overcurrent
67 Phase Directional
67N Neutral Directional
67G Ground Directional
67P Positive-Sequence Directional
67Q Negative Sequence Directional
Harmonic Blocking
Phase Selector
27 Phase Undervoltage
59 Phase Overvoltage
59N Neutral Overvoltage
64 Ground Overvoltage
27SP Single-Phase Undervoltage
47 Negative Sequence Overvoltage
49 Thermal Image (configurable with RMS or TRUE RMS)
49HS Thermal Unit Hot Spot
50OL Instantaneous Overload unit
51OL Time-delayed Overload unit
81M Overfrequency
81m Underfrequency
81D Rate of Change of the Frequency
Load Shedding
59V/Hz Overexcitation
87N Restricted Earth Faults Unit
60VT Fuse Failure Detector
60VT VT Supervision
60CT CT Supervision
60CTI2 CT Supervision based on negative sequence
60CTIN CT Supervision based on neutral differential.
3 Coil Supervision
Breaker Supervision
2 Pole Discrepancy
Trip Logic and Command
Open Pole Detector
Dead Line Detector
Saturation Detector (for all current channels)
2 Cold Load
Calendar
Lian Electric