Lincoln Electric SVM132-A service manual Section TOC

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A-6 INSTALLATION A-6

FIGURE A.2 – CONNECTION OF LN-8 TO AN IDEALARC R3S-400, 600 OR 800

(WITH LVC) (DISCONTINUED)

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WARNING

ELECTRIC￿

SHOCK￿

CAN KILL

TURN OFF INPUT POWER TO THE WELDING POWER SOURCE USING THE DISCONNECT SWITCH BEFORE WORKING

ON THIS EQUIPMENT.

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						TO OPTIONAL R3S
						LINE VOLTAGE
						COMPENSATOR
75	76	77
N.A.						TO LN-8
						INPUT CABLE PLUG
21	2	31	32	4	A
					B	N.D.
					C
					4
					GND	LN-8 CONTROL
					32	CABLE
					31
					2	N.B.
					21
NEGATIVE		POSITIVE				ELECTRODE CABLE TO
						WIRE FEED UNIT
					N.C.
N.B.						TO WORK
POWER SOURCE

TAPE UP BOLTED CONNECTION

THE ABOVE DIAGRAM SHOWS THE ELECTRODE CONNECTED FOR POSITIVE POLARITY. TO CHANGE POLARITY, TURN OFF THE POWER, REVERSE THE ELECTRODE AND "TO WORK" LEADS AT THE POWER SOURCE, AND REVERSE THE "CONTROL SWITCH" AT THE POWER SOURCE.

CONNECT THE LN-8 CONTROL CABLE GROUND LEAD TO THE FRAME TERMINAL MARKED NEAR THE POWER SOURCE TERMINAL STRIP OR TO AN UNPAINTED FRAME SCREW. THE POWER SOURCE MUST BE PROPERLY GROUNDED.

N.A. ON EARLIER R3S-400, -600, AND -800 MACHINES, TERMINALS #67 AND #1 WERE ALSO ON THE TERMINAL STRIP.

N.B. WELDING CABLES MUST BE OF PROPER CAPACITY FOR THE CURRENT AND DUTY CYCLE OF IMMEDIATE AND FUTURE APPLICATIONS. N.C. EXTEND LEAD #21 USING #14 OR LARGER INSULATED WIRE PHYSICALLY SUITABLE FOR THE INSTALLATION. AN S16586-[ ]

REMOTE VOLTAGE SENSING WORK LEAD IS AVAILABLE FOR THIS PURPOSE. CONNECT IT DIRECTLY TO THE WORK PIECE, KEEPING IT ELECTRICALLY SEPARATE FROM THE WELDING WORK LEAD CIRCUIT AND CONNECTION. FOR CONVENIENCE, THIS EXTENDED LEAD

#21 SHOULD BE TAPED TO THE WELDING WORK LEAD. (THIS EXTENDED #21 LEAD CONNECTION REPLACES THE NEED TO EMPLOY THE REMOTE WORK LEAD ACCESSORY ON LN-8 METER KITS WHICH HAVE A DIRECT WORK LEAD JACK).

N.D. LN-8 LEADS A, B, AND C (#75, #76, AND #77 ON OLDER LN-8 CONTROL CABLES) ARE TAPED UP WHEN THE R3S LINE VOLTAGE

COMPENSATOR IS CONNECTED. ARC VOLTAGE IS CONTROLLED BY THE LINE VOLTAGE COMPENSATOR RHEOSTAT. THERE WILL BE NO ADJUSTMENTS OF VOLTAGE BY THE LN-8 VOLTAGE CONTROL.

CLEVELAND, OHIO U.S.A.

LN-8