Outgoing Feeder, High H04; Features - ABB REX 521 Technical Reference Manual, Standard Configurations

REX 521
11.4.
11.4.1.
184
Protection Relay
Technical Reference Manual, Standard Configurations

Outgoing feeder, High H04

Features

This application example describes an outgoing feeder of a single busbar including:
• auto-reclosure function
• overcurrent protection
• directional and non-directional earth-fault protection
• phase discontinuity protection
• thermal overload protection for cable or line
This application example is an optional solution for the seventh application example
(chapter 8.7), if extended earth-fault protection against a cross-country fault is
required or wider range of measurements is needed.
The network is either compensated or isolated. Three-phase current measurement is
established with a set of current transformers. The neutral current I
with a cable current transformer and the neutral current I
connection of the phase current transformers. The residual voltage is measured with
a set of voltage transformers in an open-delta connection. Phase-to-phase voltage
measurements are established with voltage transformers.
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REX 521 H04
Application Example 11
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