Protection and Control

The 750/760 Feeder Protection System is a digital relay for the management, primary protection and control of distribution feeders.

This easy-to-use relay provides comprehensive protection functions for feeders and backup protection for buses,

transformers and transmission lines while reducing product life cycle costs.

Time and Instantaneous Overcurrent

The 750/760 has a two-phase TOC element with level detectors for each phase.

750/760 also has two overcurrent elements, most commonly used for primary and backup protection.

Each TOC element has the following programmable features:

– Pickup current levels for tripping, alarming, or control

– Choice of 15 curve shapes (including FlexCurves) and curve multipliers

– Instantaneous or linear reset time characteristics

– Voltage limiting

The 750/760 has two phase IOC elements, each with a level detector.

Each IOC element has a programmable pickup current, a time delay after which the current

must exceed the pickup current to operate, and a minimum number of phases required to operate.