CM-ET Lodestar - Manual (Page 9)

POWER SUPPLY AND
ELECTRICAL CONNECTIONS
The hoist should be connected to a branch circuit which com-
plies with the requirements of the National Electrical Code
and applicable local codes.
It is recommended, especially for a single phase hoist with a
one horsepower motor (.746 Kilowatts), that a line of ade-
quate capacity be run directly from the power supply to the
hoist to prevent having problems with low voltage and circuit
overloads.
For grounding of the hoist, the power cord includes a ground-
ing conductor (green yellow, G-Y). Before connecting the
hoist to the power supply, check that the power to be used
agrees with the position of voltage change plug on the volt-
age change board. The nominal hoist voltage rating corre-
sponding to the voltage range given on hoist identification
plate is:
THREE PHASE HOIST
Unless ordered on a special basis, all single speed dual volt-
age (230/460-3-60, 220/380-3-50 and 220/415-3-50) hoists
are factory arranged to operate on 460-3-60 (or 380-3-50 or
415-3-50). However, a voltage change board is provided to
easily and quickly change from 460 to 230 (or 380 to 220 or
415 to 220) volt operation. The voltage change board shown
in Figure 12 is located in the hoist as shown in Figure 13.
Voltage change board is located under back frame cover
(1) for Models B, C & F and under motor housing cover
(2) for Models J, L, R, LL and RR.
The voltage change board is color coded to indicate high and
low volt connections. Connecting the 9 and 12 pin plugs into
the “Red” voltage change board recepticles will connect the
hoist for high voltage (380-3-50, 415-3-50 or 460-3-60). To
change the hoist voltage to low voltage (208-3-60, 220-3-50 or
230-3-60) simply remove the 9 and 12 pin plugs from the
“Red” recepticles and insert same into the “White” recepticles
located on the voltage change board.
Be sure to make a notation of the new hoist voltage on the tag
attached to the power cord.
PROPER PHASING
Since the motor in a three phase hoist can rotate in either
direction, depending on the manner in which it is connected
to the power supply, the direction of hook movement must be
checked prior to each usage.
NOTE: Serious damage can result if the hook is run to
the upper or lower limit of travel with the hook operating
in a direction opposite to that indicated by the control sta-
tion. Therefore, proceed as follows:
1. Make temporary connections at the power supply.
2. Operate
(UP) control momentarily. If hook raises,
connections are correct and can be made permanent.
3. If hook lowers, it is necessary to change direction by inter
changing the Blue lead and the Black lead of hoist power
cord at power supply. Under no circumstances should the
internal wiring of the control device or hoist be changed to
reverse hook direction. The wiring is inspected and tested
before leaving the factory.
SINGLE SPEED UNITS
Low
Range Nominal
Volts
High
Range Nominal
Volts
380-415 400
220-240 230 440-460 460
5
Figure 12. Voltage Change Board
Figure 13. Location of Components
2
1
HIGH
VOLTAGE (RED)
LOW
VOLTAGE
(WHITE)