Lincoln Electric IM318-B manual Connection of DC-1500 to NA-5

DIAGRAMS

Connection of DC-1500 to NA-5

Above diagram shows electrode connected po- sitive. To change polarity, turn power off, reverse the electrode and work leads at the power source, and position the switch on power source to proper polarity.

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 avail- able for this purpose. Connect it directly to the work piece keeping it separate from the welding work cable connection to work piece. For convenience, this extended #21 lead should be taped along the welding work cable. (This extended #21 lead connection replaces the need to employ the remote work lead accessory on LN-9’s which have a direct work lead jack.)

N.C. Tape up bolted connection.

N.D. Connect the NA-5 control cable ground lead to the frame terminal marked near the power source terminal strip. The power source must be

properly grounded.

N.E. If using an older automatic control cable with leads 75, 76, 77; connect lead 75 to #75 on terminal strip, connect lead #76 to #74 on terminal strip, connect lead #77 to #73 on terminal strip.

N.F. Connect the jumpers on the NA-5 voltage board as follows: connect RED jumper to pin “S”, connect WHITE jumper to pin “B”.

N.G. Set the DC-1500 controls as follows:

Set the control switch to “Output Control Remote”. For C.V. Submerged Arc Processes, set the mode switch to “C.V. Submerged Arc”. For Open Arc Processes, set the mode switch to “C.V. Innershield”.

N.H. For proper operation, the electrode cable must be snugged under the clamp bar on the left side of the NA-5 control box.

S16889

7-6-84G

Connection of DC-1500 With NL Option Kit (K783) to LAF-3 (Obsolete)

WARNING

	• Do not operate with covers
	removed.
	• Disconnect welding power source
	before servicing.
	• Do not touch electrically live
ELECTRIC SHOCK	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 au- tomatic equipment.

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

N.C. Terminals 73 & 74 not present on earlier D.C. 1500’s.

This diagram shows the electrode connected po- sitive. To change polarity, turn power source off, reverse the electrode and work leads at the power source and position the leads on the back of the ammeter and voltmeter in the LAF-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.

For best arc striking when connected to an LAF-3 make the following inside the LAF-3 control unit. Remove the jumper lead connected between #1 on the coil on the main relay and #7 on the coil of the transfer relay. (The main relay is the upper right relay when facing the left end of the control box. The transfer relay is just to the left of the main relay.

M13321

2-26-82C

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