Siemens 8DJH Series Installation And Operating Instructions Manual page 100

Installation
Switching on
consumer feeders
100
Plug the measuring cables of the phase comparison test unit into the "L1" test
sockets of the two panels.
Read the indication.
Proceed in the same way with the test sockets of the two other phases
("L2" and "L3").
If the test unit shows "coincidence" in any case, the phase sequence of the tested
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feeder is correct.
When all incoming feeders are switched on:
One after the other, switch on all outgoing feeders that are connected to
consumers only.
Now, all feeders are switched on; the switchgear is totally in operation.
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Revision 03 * INSTALLATION AND OPERATING INSTRUCTIONS 8DJH * 500-8067.9