Miller Electric 400P, 500 X manual Three-Phase Power Connection, Rear Of Panel

8-2. Connecting To Optional Three-Phase Generator (CC/CV Models Only)

		. Place Process/Contactor switch
			in Weld Terminals Always On -
			Stick position when using three-
Single-Phase Power Connection	1	2	phase generator (see Section
			7-3).
		Single-Phase Generator Power
		1 120/240 V 50 A Receptacle
			RC5
		RC5 is connected to the optional
		three-phase generator and supplies
		60 Hz single-phase power at weld/
		power speed. Maximum output from
		RC5 is 12 kVA/kW. Power available
		at RC5 is reduced when welding.
		2	Supplementary Protector CB7

Three-Phase Power Connection

Y Close panel opening if no connections are made to generator.

AC	Single	Three
	Phase	Phase
Output
	1	3
Volts	120/240	240
Amps	50	36
KVA/KW	12	15
Frequency	60 Hz
Engine Speed	1850 RPM

Lead 42 connects to GROUND stud on front of unit.

Jumper 42 is connected to 90 at factory.

Supplementary Protector CB7 pro- tects single-phase receptacle RC5 and the load wires from overload. If CB7 opens, all generator output stops and the receptacle does not work.

Three-Phase Generator Power ! Stop engine.

! Power and weld outputs are live at the same time. Discon- nect or insulate unused cables.

.Have qualified person install ac- cording to circuit diagram and Generator Power Guidelines (see Section 12).

Remove plug before inserting leads. Reinstall bushing.

Rear Of Panel

93Remove generator power panel mounting screws. Tilt panel forward.

91 3 Lead 93

904 Lead 92

5 Lead 91

4	92 6 Lead 42 (Circuit Grounding
	Lead)

5

6

7

9

8

91 92 93

240V

120V	1-Phase
120V
	240V
240V	3-Phase
	240V

3

2

12

10

11

Y Close panel opening if no connections are made to generator.

Tools Needed:

7Lead 90 (Neutral)

8Isolated Neutral Terminal

9Jumper Lead 42

10Grounding Terminal

Jumper 42 is connected to lead 90 at factory. Jumper 42 may be discon- nected from neutral to meet applica- ble electrical codes.

Lead 42 connects to front panel Ground stud.

11User-Supplied Leads

12Supplementary Protector CB7 User Terminals

Connect user-supplied leads to ter- minals on CB7 and to the isolated neutral terminal and grounding termi- nal as necessary.

.Supplementary protector CB7

protects single-phase receptacle RC5 and the load wires from overload. If CB7 opens, all gener- ator output stops and the recep- tacle does not work.

Reinstall generator power panel.

Ref. 197 399 / 802 332-E / 803 655

OM-4421 Page 39