ABB REL 551 2.3 Series Installation And Comissioning Manual page 134

&KDSWHU 
Overview
9HULI\LQJ WKH LQWHUQDO FRQILJXUDWLRQ
 2YHUYLHZ
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.
128