Lincoln Electric NA-3 Service Manual page 19

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FIGURE A.9 – CONNECTION OF NA-3 (ALL) TO AN SAN.
WORK ELECT
4
22
32
31
30
24
21
1
29
2
N.A.
THE ELECTRODE POLARITY SWITCHES ON THE POWER SOURCE AND FIELD CONTROL MUST BE SET FOR THE SAME POLARITY. THE POWER
SOURCE MUST BE OFF WHEN CHANGING THE POLARITY.
CONNECT THE CONTROL CABLE GROUND LEAD TO THE FRAME TERMINAL MARKED
TO AN UNPAINTED FRAME SCREW. THE POWER SOURCE MUST BE PROPERLY GROUNDED.
IF THE OPTIONAL SOLID STATE MOTOR GENERATOR FIELD CONTROL IS NOT USED, TAPE UP SEPARATELY THE LEADS A, B, AND C FROM
THE CONTROL CABLE. ALSO CONNECT A JUMPER FROM TERMINAL #2 TO TERMINAL #24 ON THE POWER SOURCE TERMINAL STRIP.
N.A. WELDING CABLES MUST BE OF PROPER CAPACITY FOR THE CURRENT AND DUTY CYCLE OF IMMEDIATE AND FUTURE APPLICATIONS.
N.B. EXTEND LEAD #21 USING #14 AWG 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.
N.C. IF USING AN OLDER CONTROL CABLE, CONNECT LEADS #75, #76, AND #77 TO LEADS #75, #76, AND #77 OF THE FIELD CONTROL,
RESPECTIVELY.
INSTALLATION
WARNING TURN OFF INPUT POWER
TO THE WELDING POWER
SOURCE USING THE
DISCONNECT SWITCH
BEFORE WORKING
ELECTRIC
ON THIS EQUIPMENT.
SHOCK
CAN KILL
N.A.
OPTIONAL
4 24
SOLID STATE
FIELD CONTROL
BOLT AND TAPE CONNECTIONS
NA-3 AND NA-4
ELECTRODE CABLE TO
AUTOMATIC SHUNT OR FEEDER
1 2 75 76 77 32 31
32
31
GND
21
N.B.
NEAR THE POWER SOURCE TERMINAL STRIP OR
R
CLEVELAND, OHIO U.S.A
FIELD CONTROL
INPUT CABLE
TO AUTOMATIC CONTROL
BOX OR FEEDER
4
CONTROL CABLE
C
N.C.
B
A
2
TO WORK
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