Application Examples, Medium; Outgoing Feeder, Medium M01; Features - ABB REX 521 Technical Reference Manual, Standard Configurations

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10.
10.1.
10.1.1.
Protection Relay
Technical Reference Manual, Standard Configurations

Application examples, Medium

Outgoing feeder, Medium M01

Features

This application example describes an outgoing feeder of a single busbar including:
• overcurrent protection
• directional earth-fault protection
• phase discontinuity protection
• thermal overload protection for cable/line
The network is compensated earthed or isolated. Three-phase current measurement
is established with a set of current transformers and the neutral current is measured
with a cable transformer. The residual voltage is measured with a set of voltage
transformers in an open-delta connection.
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Application Example 5
REX 521 M01
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