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ABB REB611 Busbar and Multipurpose Differential Protection functions

From:ABB | author:Mr.Chen | Time :2025-07-21 | 2 view: | Share:

Standardized configuration

REB611 is available in one configuration.

To increase the user-friendliness of the configuration and to

emphasize the relay's simplicity of usage, only the application

specific parameters need setting within the relay's intended area of application.

The standard signal configuration can be altered by local HMI,

Web HMI or optional application functionality of Protection and

Control IED Manager PCM600.

Protection functions

REB611 offers phase-segregated (three phases) high

impedance differential protection and non-directional earth

fault protection for busbars, motors and generators. The relay

also offers high-impedance differential-based restricted earth

fault protection for motors, generators, reactors and power

transformers. REB611 is ideally suited for backup protection.

Application

REB611 offers bus-differential protection in a single zone with

bus-wire supervision. It also offers the possibility for bus

differential protection over two zones using two REB611 relays.

The combined restricted earth-fault and residual earth-fault

protection functionalities of the relay enable its use in the

protection of a motor or generator. Due to the individuality of

the high-impedance protection functions, a single relay can be

used for restricted earth-fault protection of both the high and

low voltage sides of a power transformer.

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