Lincoln Electric DC-655 Input Power Supply Connections, Input Supply Connection Diagram

A-5 A-5

INSTALLATION

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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.

RECONNECT PROCEDURE

WARNING

Electric Shock Can Kill

•Disconnect input power before per- forming this procedure.

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4. Follow input supply connection diagram located	Multiple voltage machines are shipped connected to
on the inside of the door.
5. Connect the three-phase AC power supply leads	the highest input voltage listed on the machine’s rating
	plate. Before installing the machine, check that the
L1, L2, and L3 to the input contactor
	reconnect panel in the input box assembly is connect-
terminals in the input box assembly. See Figure
	ed for the proper voltage.
A.1.
	CAUTION
	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.

		DUAL VOLTAGE MACHINE
Do not operate with covers	Do not touch electrically live parts	INPUT SUPPLY CONNECTION DIAGRAM
removed	Only qualified persons should install,	IMPORTANT: CHANGE LINK POSITIONS AND CONTROL TRANSFORMER CONNECTIONS.
Disconnect input power before
servicing	use or service this equipment	NOTE: MACHINES ARE SHIPPED FROM FACTORY CONNECTED FOR OVER 300 VOLTS

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L3	W CR1
INPUT	V
LINES L2
	CONTACTOR
L1	U
GND	H1
	H3
	CONTROL
	TRANSF.

LINKS

CONNECTION FOR HIGHEST RATING PLATE VOLTAGE

	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.
	3. CONNECT L1, L2 & L3 INPUT SUPPLY LINES AND H1 & H3 CONTROL TRANSFORMER
		LEADS TO THE INPUT SIDE OF CR1 CONTACTOR AS SHOWN.
	4	. CONNECT TERMINAL MARKED	TO GROUND PER LOCAL AND NATIONAL ELECTRIC
		CODES.
H2	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

ALL OF THE HEX NUTS.

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				CONNECTION FOR LOWEST RATING PLATE VOLTAGE
					1. TURN OFF THE INPUT POWER USING THE DISCONNECT SWITCH AT THE FUSE BOX.
		L3		W CR1	2. DISCONNECT AND INSULATE THE H3 LEAD TERMINAL WITH TAPE TO PROVIDE AT
INPUT					LEAST 600 VOLT INSULATION.
		L2		V	3. CONNECT L1, L2 & L3 INPUT SUPPLY LINES AND H1 & H2 CONTROL TRANSFORMER
LINES				CONTACTOR	LEADS TO THE INPUT SIDE OF CR1 CONTACTOR AS SHOWN.
		L1		U	4. CONNECT TERMINAL MARKED	TO GROUND PER LOCAL AND NATIONAL ELECTRIC
	GND			H1	CODES.
			H2		5. MOUNT THE LINKS IN THE POSITIONS SHOWN. CONNECT THE FLEX LEAD AS SHOWN;
				H3
				CONTROL	POSITIONING THE LUGS TO MAINTAIN MAXIMUM CLEARANCE TO THE LINKS.
					INSTALL AND TIGHTEN ALL OF THE HEX NUTS.
				TRANSF.
LINKS						D-UF
THE LINCOLN ELECTRIC CO., CLEVELAND OHIO U.S.A.						M18225

FIGURE A.2 - DUAL VOLTAGE MACHINE RECONNECTION PROCEDURE

IDEALARC DC-655