Lincoln Electric SVM132-A service manual LN-8 for Same Polarity Operation

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A-12		INSTALLATION					A-12
	FIGURE A.8 – K318 DUAL PROCESS CONTACTOR KIT DC-400, CV-400 AND CVI-500 CONNECTION TO
		LN-8 FOR SAME POLARITY OPERATION
		WARNING	TURN OFF INPUT POWER
			TO THE WELDING POWER
			SOURCE USING THE
			DISCONNECT SWITCH
			BEFORE WORKING
		ELECTRIC￿	ON THIS EQUIPMENT.
		SHOCK￿
		CAN KILL
		N.B.B.			N.B.B.
				21A 21B		DUAL PROCESS
						CONTACTOR

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					DC-400
												N.C.
	21	4	2	31		32			75	76	77					81
																80
																	77
																	76
																	75
															4
							N.A.A.
																	GND
																	2
																	31
														32
						N.F.
TO NEGATIVE OUTPUT							TO POSITIVE OUTPUT
STUD ON POWER								STUD ON POWER
	SOURCE								SOURCE
												WELDER
												CONTROL
													CABLE

GND

A

B

C

21

4

2

32

31

N.B.

WELDING LEAD STUD ON

BACK OF CONTACTOR KIT

GND

A			B
	75	75			A
	76	76			B
	77	77			C
				21
					4
	4	4
	2	2			2
	32	32			32
	31	31			31
A			B

N.B.

N.E.

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N.A. TO WORK

N.D.

WIRE FEEDER	ELECTRODE	WIRE FEEDER
CONTROL	CABLES	CONTROL
CABLE		CABLE
N.A.		N.A.

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TO "A" WIRE FEEDER TO "B" WIRE FEEDER

FOR 50 HZ OPERATION, DISCONNECT BOTH BROWN LEADS FROM TERMINAL 31B AND TAPE UP EACH LEAD. UNTAPE BOTH RED LEADS AND CONNECT TO 31B.

N.A.A. 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.B.B. EXTEND LEAD #21A & #21B 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 LEAD CIRCUIT AND CONNECTION. FOR CONVENIENCE, THESE EXTENDED #21A AND #21B LEADS SHOULD BE TAPED TO THE WELDING WORK LEAD. EACH LEAD MUST BE CONNECTED DIRECTLY TO THE WORK AND LEADS MUST NOT BE CONNECTED TOGETHER.

N.A. WELDING CABLES MUST BE OF PROPER CAPACITY FOR THE CURRENT AND DUTY CYCLE OF IMMEDIATE AND FUTURE APPLICATIONS. N.B. BOLT AND TAPE CONNECTIONS.

N.C. TAPE UP SEPARATELY.

N.D. PUT TRANSFER SWITCH IN "SAME POLARITY ON FEEDERS" POSITION.

N.E. MODE SWITCHES ON CONTACTOR KIT ARE NOT FUNCTIONAL WHEN USED WITH THE POWER SOURCE.

N.F. CONNECTION SHOWN FOR NEGATIVE POLARITY. FOR POSITIVE POLARITY REVERSE ELECTRODE AND WORK CABLES CONNECTED TO POWER SOURCE OUTPUT STUDS.

CLEVELAND, OHIO U.S.A.

LN-8