# 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
  • 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
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
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