Technical Description; Functional Description; Parametrization; Local Parametrization - ABB REX 521 Technical Reference Manual, General

1MRS 751108-MUM
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4.1.
4.1.1.
4.1.1.1.
4.1.1.2.
Protection Relay
Technical Reference Manual, General

Technical description

Functional description

Parametrization

To ensure that a protection function block protects the feeder in the desired manner,
the default values of parameters must be checked and set before taking the function
block into use.
The parameters can be set either locally over the HMI or externally via the serial
communication using Relay Setting Tool. See "Serial communication" on page 23.

Local parametrization

The parameter to be changed is entered by navigating in the menu structure. For
detailed instructions, refer to Operator's Manual (1MRS751107-MUM).

External parametrization

The Relay Setting Tool is used for external parametrization of the protection relay.
The parameters can be set by using a PC and downloaded to the protection relay over
a communication port. The menu structure of the setting tool, including views
relating to parametrization and settings, is the same as the menu structure of the
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protection relay . The use of the tool is instructed in "Tools for Relays and
Terminals, User's Guide" (refer to section "References" on page 43).
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1. A few parameters are visible only in the relay, see list on page 57.
REX 521
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