LG LP-K3020HL Service Manual page 23

Power Supply and Wiring
The unit is completely wired internally at the fac-
tory according to general rule of electrical tech-
nology, but local rules, if they are required, should
be complied with.
1. Power supply
Power source must fulfill the following conditions:
¤ The working voltage should be higher than
90% and lower than 110% of the rated voltage
marked on the name plate.
¤Ł The starting voltage should be higher than
85% of the rated voltage marked on the name
plate.
Voltage
Power source voltage
working voltage
Starting voltage
2. Wiring
After the confirmation of the above conditions, pre-
pare the wiring as follows:
¤ Use the power supply cord(Rubber insulation,
type Ho7RNF approved by HAR or SAA) suit-
able for the product's electriccal capacity.
Starting point
Time
UNIT VOLTS
H/P 450/750V
30K
C/O 450/750V
¤Ł Provide a recognized circuit breaker as below
between power source and unit.
A disconnection device to adequately discon-
nect all supply lines must be fitted.
(for service operations)
UNIT
H/P
30K
C/O
¤Ø The screws which fasten the wiring in the cas-
ing of electrical fittings are liable to come loose
from vibrations to which the unit is subjected
during the course of transportation. Check
them and make sure that they are all tightly fas-
tened.
(If they are loose, it could give rise to burn-out
of the wires.)
¤ŒSee to it that the starting voltage is maintained
at more than 90 percent of the rated voltage
marked on the name plate.
¤ºThe following troubles would be caused by volt-
age drop-down.
Vibration of a magnetic switch, damage on the
contact point there of, fuse breaking, distur-
bance to the normal function of a overload pro-
tection device.
–23–
Outside
Conductor
diameter
cross-sectional area
4.0mm 2 13.3mm
2.5mm 2 11.8mm
Circuit breaker capacity
30A
30A