Lian Electric

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	IRL

Compact Feeder Protection

Final Order Code
IRL

DI
DO
HSHD DO
AI (-5 - +20mA)
AI (0-300vDC)
CT
PT
Communication Protocol
Serial Ports
Ethernet Ports

ANSI	Functions
50	Instantaneous Phase Overcurrent
51	Time-delayed Phase Overcurrent (Inverse / Fixed)
50N	Instantaneous Neutral Overcurrent
51N	Time-delayed Neutral Overcurrent (Inverse / Fixed)
50G	Instantaneous Ground Overcurrent (*)
51G	Time-delayed Ground Overcurrent (Inverse / Fixed)
50Q	Instantaneous Negative Sequence Overcurrent (I2)
51Q	Time-delayed Negative Sequence Overcurrent (Inverse / Fixed) (I2)
50Ns	Instantaneous Sensitive Ground Overcurrent
51Ns	Time-delayed Sensitive Ground Overcurrent
51Ns EPTR_C	Time-delayed Sensitive Ground Overcurrent with EPTR_C
51Ni/c	Ungrounded / Compensated Neutral Overcurrent
50V	Instantaneous Voltage Dependent Overcurrent
51V	Time-delayed Voltage Dependent Overcurrent
67	Phase Directional
67N	Neutral Directional
67G	Ground Directional
67Ns	Sensible Neutral Directional
67P	Positive-Sequence Directional
67Q	Negative Sequence Directional
67Ni/c	Isolated / Compensated Neutral Directional
85	Overcurrent Teleprotection Schemes
50FD	Fault Detector
	Phase Selector
46	Open Phase Detector
37	Time-Delayed Phase Undercurrent
27	Phase Undervoltage
59	Phase Overvoltage
59N	Neutral Overvoltage
47	Thermal Image
49	Overfrequency
81M	Overfrequency
81m	Underfrequency
81D	Rate of Change of the Frequency
	Load Shedding
25	Synchronism Check Unit
32P/Q	Directional Power (active / reactive)
50BF	Breaker Failure Protection
78	Out-of-Step
	Cold-Load
59V/Hz	Overexcitation
64REF	Restricted Earth Fault
60VT	VT Supervision and Fuse Failure
60CT	CT Supervision
25	Synchrocheck
79	Recloser
	Sequence coordination
3	Coil Supervision
	Breaker Supervision
	Fault Locator
2	Pole Discrepancy
	Open Pole Detector
	Dead Line Detector
	Saturation Detector
	Harmonics Blocking
	Calendar