Overview - ABB REL 551-C1 2.3 Series Installation And Commissioning Manual

Line differential protection terminal
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Overview

Overview
Before start of this process, all individual devices that are involved in the fault clearance
process must have been tested as individuals and set in operation. The breaker must be
ready for an open-close-open cycle.
The shaping of the test process is dependent on the complexity of the design of the
switchyard. Hereby follows some items which could be used as guidelines.
Verifying the internal configuration
Chapter 12

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