
B–70115EN/03
6. TROUBLESHOOTING
171
Ascertain the followings,
1) line voltage: 200/220 VAC, +10%, –15%
2) frequency: 50/60 Hz – 1 Hz
3) 3 phases
Here the combination of 220 V and 50 Hz is prohibited.
Using a phase rotation sensor, L1, L2 and L3 phases of which are
connected to U, V and W phases of the input terminal respectively as
shown in the figure, select the phase of the power line in such a way that
the rotation direction becomes clockwise.
In the absence of a phase relation indicator, complete the connection of
the main breaker so that the exhaust gas is emitted from the laser gas
exhaust outlet.
Input terminal
Phase rotation sensor
VUGW
1st does grounding
L3
L2
L1
6.5
OBSERVING
VOLTAGE OF POWER
LINE
6.5.1
Measurement of
Voltage
6.5.2
Phase Relation