Lincoln Electric IM420-D manual Connection of DC-1000 or DC-1500 to NA-3, LT-5 or LT-7, M13322 90F

F-2	DIAGRAMS	F-2
	CONNECTION OF DC-1000 WITH NL OPTION KIT TO LT-3 or LT-34 (Obsolete)

N.C.

POWER SOURCE

N.B.

82 21 4 2 31 32 73 74 75 76 77

	67 21 4	2 31 32	75 76 77
N.A.	NEGATIVE	POSITIVE

N.D.

				4
				2
				1
				10
		10		21
			6
				32
		E	D	31
				22
		F	C	75
35 VOLT CONTROL
				76
	EXCITER	21	1	77

NL OPTION

CONNECT THE RED LEAD TO

TERMINAL 22

75

76

77

GND

		6		10 4 21	1	2 31
LT-3 REMOTE		41 42 43		44 58	59	61
DC CONTROL						BOLT & TAPE
BOX
						7 CONNECTIONS
2	1 32 29 31 5	41 42 43		44 58	59	61
			SPARE
			TAPE UP SPARE LEADS (NOT USED)

ELECTRODE CABLE TO

AUTOMATIC EQUIPMENT

TO WORK

K-775 REMOTE CONTROL

MOUNTED AT TRACTOR

TO LT-3 TRACTOR

CONTROL BOX

M13322

8-2-90F

N.A. On all DC-1000 and DC-1500’s above Code 8234 extend lead 67 and connect it to the electrode cable going to the automatic equipment.

N.B. On DC-1500 units below code 8234 this is #67 and the LT-3 or LT-34 #67 lead can be connected either to the #67 or the electrode cable terminal as shown. Terminal 82 not present on later D.C. 1500’s and all DC- 1000’s.

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

N.D. Alternative 500 amp positive terminal connection provided on DC-1000 models above code 9500 only.

This diagram shows the electrode connect- ed 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 NL Option Kit to the proper polarity. Also reverse the leads on the back of the ammeter and volt- meter 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.

CONNECTION OF DC-1000 OR DC-1500 to NA-3, LT-5 or LT-7

										T O A U T O M A T I C
			P O W E R S O U R C E							C O N T R O L B O X
							N . D .		C O N T R O L C A B L E
2 1	4	2	3 1	3 2	7 3	7 4	7 5	7 6	7 7		G N D
											C	}*
											B
											A
											3 2
											3 1
											2
											4
											2 1
N . B . &
N . C .					P O S I T I V E
N E G A T I V E
		N . E .								E L E C T R O D E C A B L E T O
										} A U T O M A T I C E Q U I P M E N T
S15534					N . A .					}
8-2-90F											T O W O R K

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.

Connect the control cable ground lead to the frame terminal

marked near the power source terminal strip. The power source must be properly grounded.

*If using an older control cable: Connect lead #75 to #75 on termi- nal 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 electrically separate from the welding work lead circuit and connection. For conve- nience, this extended #21 lead should be taped to the weld- ing work lead.

N.C. Tape up bolted connection.

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

N.E. Alternative 500 amp positive terminal connection provided on DC-1000 models above code 9500 only.

IDEALARC® DC-1000