Bus Sectionalizer, High H03; Features - ABB REX 521 Technical Reference Manual, Standard Configurations

1MRS 751802-MUM
11.3.
11.3.1.
Protection Relay
Technical Reference Manual, Standard Configurations

Bus sectionalizer, High H03

Features

This application example describes a bus sectionalizer of a single busbar including:
• overcurrent protection
• synchro-check and
• voltage-check function
The network can be compensated, isolated, resistance or solidly earthed. Three-
phase current measurement is established with a set of current transformers. Phase-
to-phase voltage measurements are established with voltage transformers in both
sections of the busbar.
The High H03 variant of the REX 521 is selected to be used in this application
because of the synchro-check and voltage-check functionality. This selection makes
it possible to extend the automatic supervision functionality in the substation. The
synchro-check function does not allow closing of the bus sectionalizer if the
operation criteria are not fulfilled.
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REX 521 H03
Application Example 10
REX 521
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