ABB RED650, Руководство по применению

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Section 2 Application
2.1 General IED application
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RED650 is used for the protection, control and monitoring of overhead lines and
cables in solidly or impedance earthed networks. It is suitable for the protection of
heavily loaded lines and multi-terminal lines where the requirement for fast one-
and/or three-phase tripping is wanted. Back-up protection and apparatus control for
1 circuit breaker is included.
The phase segregated current differential protection provides an excellent
sensitivity for high resistive faults and gives a secure phase selection. The
availability of six stabilized current inputs per phase allows use on multi-breaker
arrangements in two or three terminal applications. The communication between
the IEDs involved in the differential scheme is based on the IEEE C37.94 standard
and can be made redundant for improved reliability. Charging current
compensation allows high sensitivity, even on long overhead lines and cables.
The full scheme distance protection provides protection of power lines with high
sensitivity and low requirements on remote end communication. The 6 zones have
fully independent measuring and setting ranges which gives high flexibility for all
types of lines. Load encroachment and adaptive reach compensation are included.
The multi-shot autoreclose includes priority features for double-breaker
arrangements. It co-operates with the synchrocheck function with high-speed or
delayed reclosing.
Breaker failure, high set instantaneous phase and earth overcurrent, four step
directional or non-directional delayed phase and earth overcurrent and two step
undervoltage protection are included and configured as back-up protection.
The impedance protection and the directional overcurrent protection can
communicate with a remote end in any teleprotection communication scheme. The
advanced logic capability, where the user logic is prepared with a graphical tool,
allows special applications. Communication for teleprotection schemes can be
realized over the differential protection communication link.
The IED can be used in applications with the IEC 61850-9-2LE process bus with
up to four Merging Units (MU). Each MU has eight analogue channels, four
current and four voltages. Conventional input transformer module and Merging
Unit channels can be mixed freely in your application.
The power swing detection function is used to detect power swings and initiate
block of all distance protection zones. The occurrence of earth-fault currents during
a power swing inhibits the function to allow fault clearance. A complementary
1MRK 505 393-UEN B
Section 2
Application
Line differential protection RED650 2.2 IEC 27
Application manual