UFC 3-560-01
6 December 2006
Including change 1, 7 December 2006
measure voltages by connecting a voltmeter between the two sides. If the lines are in
phase, the voltmeter will register zero.
Figure 5-2. Phasing Check Using Hot-Stick Phasing Testers
Switching Device
Locked Open
A
1
B
2
3
C
Hotstick
Check phases A,B,C,1,2,3
individually by moving
V
contact hook to ensure
each phase is energized
Voltmeter
and reaches appropriate
voltage
STEP 1
Switching Device
Locked Open
A
1
B
2
3
C
Hot-
sticks
V
Jumper the hotsticks across
the open switch and check
Voltmeter
each phase, A-1, B-2, and C-3.
If circuits are in phase, the
Cord
voltmeter will register zero.
Connection
Connect all phases as necessary
for all connections to register zero.
STEP 2
5-5.4
Line Fault Locators. Use line fault locators on underground lines up to 34.5
kilovolts to determine the location of line faults.
5-10
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