A low control power model of the series, the 760-P5-G5-S5-LO-A20-R Distribution Feeder Protection Relay accepts a control power range of 88 to 300 VDC, 70 to 265 VAC at 48 to 62 Hz. Adept at protecting and managing distribution feeder systems, the relay is equipped with a number of protective features that reduce system downtime and preserve component health:
Reclosure: Unique to the 760 series, this model is able to open a circuit or line when an overcurrent such as a short circuit is detected. The recloser can then autoassess if system conditions are healthy again, reclosing the circuit to restore normal function or keeping the line open if system health is not restored.
Neutral and Phase Directional Control: This feature protects the system against phase-to-phase and phase-to-earth short circuits and offers total selectivity. The directional overcurrent relaying can shield multiple source feeders when relay tripping needs to be limited in a single direction.
Bus Transfer: This feature can transfer the load bus to an alternate power source when normal power fails and helps keep operation in-process.
Reverse Power Detection: The 760-P5-G5-S5-LO-A20-R is able to raise a trip or alarm when power flows in an unintended direction. This feature helps eliminate auxiliary equipment that would typically be employed.
The 760-P5-G5-S5-LO-A20-R’s high configurability can be a double-edged sword; while the system is highly configurable, this also makes it more difficult to learn due to the wide range of potential settings and parameters. An experienced user should handle programming to ensure that setpoints enable maximum efficiency and protection for the given system. The 1601-0120-AE (or its accompanying revisions) provides assistance for system programming, though not every configuration can be covered.