Lincoln Electric IM526-B LN-25 Connection Instructions, Single Phase Input, Three Phase Input

INPUT VOLTAGE SETUP

CAUTION

DO NOT ATTEMPT TO POWER THIS UNIT FROM THE AUXILIARY POWER SUPPLY OF AN ENGINE WELDER.

•Special protection circuits may operate, causing loss of output.

•The supply from engine welders often has exces- sive voltage peaks because the voltage waveform is usually triangular shaped instead of sinusoidal.

•If voltage peaks from the engine welder exceed 380V, the input circuits of this machine protecting the filter capacitors, FETS and other components

from damage will not be energized .

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Recommended Fuse Sizes Based On The U.S.

National Electrical Code And Maximum

Machine Outputs

	Input Volts(1)	Fuse Size in Amps
		(Time Delay Fuses)
3 phase	208	60
50/60 Hz	230	60
	460	40
1 phase	208(2)	85
50/60 Hz	230(2)	80
	460	50
3 phase	575	30
60 Hz

(1)Input voltage must be within ±10% of rated value.

(2)When operating on these inputs, at outputs exceeding 200A/60% or 165A/100%, the input line cord should be changed to an input conductor of 6 AWG or larger.

RECONNECT PROCEDURE

1.BE SURE POWER SWITCH IS OFF.

2.CONNECT LEAD ’A’ TO DESIRED INPUT VOLTAGE RANGE.

440-460V

380-415V	’A’
220-230V
200-208V

.Disconnect input power before inspecting or servicing machine.

.Do not operate with wraparound removed.

.Do not touch electrically live parts.

. Only qualified persons should install, use or service this equipment.

IF MACHINE CEASES TO OPERATE (NO METER, NO FAN) AND THERE IS NO OTHER KNOWN FAILURE: CHECK FUSE; REPLACE WITH A 3 AMP SLOW BLOW ONLY.

CONNECTION OF WIRE FEEDERS TO THE INVERTEC

(Note: IEC units do not have 110 VAC auxiliary power).

LN-25 Connection Instructions

3. POSITION SWITCH TO DESIRED INPUT VOLTAGE RANGE.
	VOLTAGE=380-460V		VOLTAGE=200-230V
THE LINCOLN ELECTRIC CO. CLEVELAND, OHIO U.S.A.		9 - 11 - 92		S20324

POWER CORD CONNECTION

A 10 ft. (3.0m) power cord is provided and wired into the machine. Follow the power cord connection instructions. Incorrect connection may result in equip- ment damage.

BLACK

GREEN

RED

WHITE

Single Phase Input

1.Connect green lead to ground per U.S. National Electrical Code.

2.Connect black and white leads to power.

3.Wrap red lead with tape to provide 600V insula- tion.

Three Phase Input

1.Connect green lead to ground per U.S. National Electrical Code.

2.Connect black, red and white leads to power.

Install in accordance with all local and national electric codes.

1.Turn the Invertec power switch “off”.

2.Connect the electrode cable to the output terminal of polarity required by electrode. Connect the work lead to the other terminal.

3.LN-25 with remote control options K431 and K432. Use K876 adapter with K432 cable or modify K432 cable with K867 universal adapter plug. See con- nection diagram S19899 and S19309 or S19405 at the back of this manual.

4.Place the local-remote switch in the “remote” posi- tion if output control is desired at the wire feeder rather than the Invertec. (LN-25 must have K431 and K432 options for remote output control opera- tion).

LN-7 Connection Instructions

1.Turn the Invertec power switch “off”.

2.Connect the K480 control cable from the LN-7 to the Invertec control cable connector. The control cable connector is located at the rear of the Invertec.

3.Connect the electrode cable to the output terminal of polarity required by electrode. Connect the work lead to the other terminal.

4.Place the local-remote switch in the “local” posi- tion to allow output control at the Invertec. (K864

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