RED670 Substation Automation Products Line

Description

Overview

Essential details：RED670 Substation Automation Products Line

Product Description

Protection for up to five line terminals
RED670 provides phase segregated line differential protection for two to five line terminal applications in impedance or solidly earthed networks, including series compensated systems.
All individual phase currents in 11/2 and multi-breaker configurations can be connected to RED670 without external summation. Therefore, each current will always be correctly measured. This improves the stability of the line differential protection function and enables integration of a number of breaker related protection and control functions.
Power transformer in the protected zone
RED670 is able to handle two or three-winding power transformer(s) in the protected zone. The line differential protection function handles all transformer winding vector groups and matches all transformer configurations with a simple parameter setting. This simplifies engineering since no auxiliary CTs or other protection equipment is needed.
Advanced stabilization methods are used for detection of transformer inrush current during energization to ensure sensitive differential protection when a power transformer is included in the protected zone.

RED670

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RED670 Substation Automation Products Line

When a small transformer is connected as a tap on the line, the line differential protection can be used without having an additional RED670 installed at the transformer tap. For low fault currents behind the tap transformer the line differential protection of RED670 includes a useful definite time or inverse time delayed characteristic. This enables selective operation of other protection functions located at the tapped transformer’s high or low voltage side.
Extensive built-in protection for lines and cables
The RED670 features integrated distance protection to ensure fault clearance in case of communication failure. The full scheme distance protection provides independent phase selection, power swing detection and a wide range of scheme communication logics. The four-zone distance protection is further enhanced with load encroachment, which increases the ability to detect high resistive faults on heavily loaded lines.
You can increase the functionality of your RED670 IEDs with optional back-up and multipurpose protection functions. Versatile overcurrent and thermal overload functions provide additional back-up protection. Breaker failure protection allows high speed back-up tripping of surrounding breakers and re-tripping of the own breaker, for instance, to avoid