Application Examples, Basic; Outgoing Feeder, Basic B01; Features - ABB REX 521 Technical Reference Manual, Standard Configurations

REX 521
9.
9.1.
9.1.1.
104
Protection Relay
Technical Reference Manual, Standard Configurations

Application examples, Basic

Outgoing feeder, Basic B01

Features

This application example describes an outgoing feeder of a single busbar including:
• overcurrent protection
• non-directional earth-fault protection
• phase discontinuity protection
• thermal overload protection for cable/line
The network is either resistance or solidly earthed. The three-phase current
measurement is established with a set of current transformers. The neutral current is
measured in a residual connection.
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REX 521 B01 Application Example 1
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