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INPUT POWER SUPPLY CONNECTIONS
A qualified electrician should connect the input power
supply leads.
1. Follow all national and local electrical codes.
2. Use a three-phase line.
3. Remove the input access door at upper rear of the
machine.
4. Follow input supply connection diagram located
on the inside of the door.
5. Connect the three-phase AC power supply leads
L1, L2, and L3 to the input contactor
terminals in the input box assembly. See Figure
A.1.
RECONNECT PROCEDURE
Electric Shock Can Kill
• Disconnect input power before per-
forming this procedure.
Multiple voltage machines are shipped connected to
the highest input voltage listed on the machine’s rating
plate. Before installing the machine, check that the
reconnect panel in the input box assembly is connect-
ed for the proper voltage.
Failure to follow these instructions can cause immedi-
ate failure of components within the machine.
To reconnect a multiple voltage machine to a different
voltage, remove input power and follow the input con-
nection diagram located on the inside of case back
input access door.
1. For dual voltage sample machine reconnect
instructions, see Figure A.2.
INSTALLATION
A-5 A-5
IDEALARC DC-655
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WARNING
1. TURN OFF THE INPUT POWER USING THE DISCONNECT SWITCH AT THE FUSE BOX.
H2
GND
5. MOUNT THE LINKS IN THE POSITIONS SHOWN. CONNECT THE FLEX LEAD AS SHOWN;
LEADS TO THE INPUT SIDE OF CR1 CONTACTOR AS SHOWN.
L1
LINES
4. CONNECT TERMINAL MARKED TO GROUND PER LOCAL AND NATIONAL ELECTRIC
2. DISCONNECT AND INSULATE THE H3 LEAD TERMINAL WITH TAPE TO PROVIDE AT
LEAST 600 VOLT INSULATION.
CODES.
INSTALL AND TIGHTEN ALL OF THE HEX NUTS.
POSITIONING THE LUGS TO MAINTAIN MAXIMUM CLEARANCE TO THE LINKS.
D-UF
INPUT
3. CONNECT L1, L2 & L3 INPUT SUPPLY LINES AND H1 & H2 CONTROL TRANSFORMER
W
CR1
V
L3
U
H3
CONTACTOR
L2
L1
W
V
GND
CR1
L3
L2
1. TURN OFF THE INPUT POWER USING THE DISCONNECT SWITCH AT THE FUSE BOX.
2. DISCONNECT AND INSULATE THE H2 LEAD TERMINAL WITH TAPE TO PROVIDE AT
LEAST 600 VOLT INSULATION.
ALL OF THE HEX NUTS.
4. CONNECT TERMINAL MARKED TO GROUND PER LOCAL AND NATIONAL ELECTRIC
CODES.
5. MOUNT THE LINKS IN THE POSITIONS SHOWN; DOUBLE OR TRIPLE STACK THE LINKS
IN THREE POSITIONS. LOOP THE FLEX LEAD IN THE POSITION SHOWN; POSITIONING
THE LUGS TO MAINTAIN MAXIMUM CLEARANCE TO THE LINKS. INSTALL AND TIGHTEN
DUAL VOLTAGE MACHINE
INPUT SUPPLY CONNECTION DIAGRAM
IMPORTANT: CHANGE LINK POSITIONS AND CONTROL TRANSFORMER CONNECTIONS.
NOTE: MACHINES ARE SHIPPED FROM FACTORY CONNECTED FOR OVER 300 VOLTS
Do not touch electrically live parts
Only qualified persons should install,
use or service this equipment
Do not operate with covers
removed
Disconnect input power before
LEADS TO THE INPUT SIDE OF CR1 CONTACTOR AS SHOWN.
TRANSF.
CONTROL
TRANSF.
CONTROL
3. CONNECT L1, L2 & L3 INPUT SUPPLY LINES AND H1 & H3 CONTROL TRANSFORMER
CONNECTION FOR HIGHEST RATING PLATE VOLTAGE
servicing
M18225
INPUT
CONTACTOR
CONNECTION FOR LOWEST RATING PLATE VOLTAGE
H2
H1
LINKS
LINES
THE LINCOLN ELECTRIC CO., CLEVELAND OHIO U.S.A.
LINKS
U
H1
H3
FIGURE A.2 - DUAL VOLTAGE MACHINE RECONNECTION PROCEDURE
CAUTION