Lincoln Electric IM318-B manual Connection of DC-1500 to NA-3 All, LT-5 or LT-7

DIAGRAMS

Connection of DC-1500 to NA-3 (All), LT-5 or LT-7

Connect the control cable ground lead to the frame terminal marked near the power source terminal strip. The power source must

be properly grounded.

To automatic control box.

*If using an older control cable: Connect lead #75 to #75 on terminal strip, connect lead #76 to #76 on terminal strip, connect lead #77 to #77 on 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 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 separate from the welding work lead circuit and connection for convenience, this extended #21 lead should be taped to the welding work lead.

N.C. Tape up bolted connection.

N.D. Terminals 73 and 74 not present on earlier DC-1500.

Above diagram shows electrode connected positive. To change polarity, turn power source off, reverse the electrode and work leads at the power source and position the switch on power source to proper polarity. Also reverse the leads on the back of the ammeter and voltmeter in the automatic control box.

S15534

2-26-82B

WARNING

Connection of DC-1500 With NL Option Kit (K783) to LT-3 or LT-34 (Obsolete)

ELECTRIC SHOCK

• Do not operate with covers removed.

•Disconnect welding power source before servicing.

•Do not touch electrically live parts.

• Only qualified persons should

can kill. install, use or service this machine.

N.A. On codes above 8234 extend lead 67 and connect it to the electrode cable going to the automatic equipment.

N.B. On codes below 8234 this is #67 and the LT-3 or LT-34 #67 lead can be connected either to #67 or to the electrode cable ter- minal as shown. Terminal 82 not present on later DC-1500’s.

N.C. Terminals 73 and 74 not present on earlier DC-1500’s.

This diagram shows the electrode connected positive. To change polarity, turn power source off, reverse the electrode and work leads at the power source and position the switch on the power source and th NL option kit to the proper polarity. Also reverse the leads on the back of the ammeter and voltmeter in the LT-3 control box.

Contactor drop out delay switch on the NL option kit must be in the “On” position.

The 4/0 cables shown will handle up to 1000 amps at 80% duty cycle. For higher currents or duty cycle add additional cables to the power source output studs.

M13322

2-26-82C

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