Incoming Feeder, High H05; Features - ABB REX 521 Technical Reference Manual, Standard Configurations

REX 521
11.5.
11.5.1.
188
Protection Relay
Technical Reference Manual, Standard Configurations

Incoming feeder, High H05

Features

This application example describes an incoming feeder to a single busbar including:
• overcurrent protection
• non-directional earth-fault protection
• overvoltage protection
• undervoltage protection
This application example is an optional solution for the second application example
(chapter 9.2.), if overvoltage and undervoltage protection is required or wider range
of measurements is needed.
The network is resistance or solidly earthed. The three-phase current measurement
is established with current transformers. The neutral current is measured via a
current transformer located in the neutral earthing circuit on the LV side of the
power transformer. Phase-to-phase voltage measurements are established with
voltage transformers.
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Application Example 12
REX 521 H05
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