832-6063.0 * MAINTENANCE SIMOSEC * REVISION 02 97
Maintenance
24.2 Verification of correct terminal-phase connections
The three-position switch-disconnector of the feeder to be tested must be in “OPEN”
position. The switchgear main bus bar must be energized. The outgoing circuit must also
be energized from the remote source (not by closing the three-position switch-
disconnector).
Verify correct terminal-phase connections at the capacitive test sockets of the panel to
be tested as compared to the test sockets of an adjacent panel conntacted to the same
main bus bar, and whose three-position switch-disconnector is closed. The phase
connections are verified using a phase comparison test unit.
Ö Plug the test leads of the phase comparison test unit into the “L1” test sockets of
the two panels.
Fig 78: Use of electronic phase comparer
Ö Read the indication.
Ö Proceed in the same way with the test sockets of the other phases (“L2” and ”L3”).
If the test unit shows “coincidence” in each case, the phase sequence of the tested
feeder is correct.
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