Input Connection

A-4	INSTALLATION	A-4

WARNING

ELECTRIC SHOCK can kill.

ONLY A QUALIFIED ELECTRICIAN SHOULD CONNECT THE INPUT LEADS TO THE FLEXTEC™ 450 CE.

CONNECTIONS SHOULD bE MADE IN ACCOR-

DANCE WITH ALL LOCAL AND NATIONAL ELECTRICAL CODES AND THE CONNECTION DIAGRAM LOCATED ON THE INSIDE OF THE RECONNECT/INPUT ACCESS DOOR OF THE MACHINE. FAILURE TO DO SO MAY RESULT IN bODILY INJURY OR DEATH.

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(See Figure A.1)

Use a three-phase supply line. A 1.40 inch (36 mm) diameter access hole for the input supply is located on the case back. Connect L1, L2, L3 and ground according to the Input Supply Connection Diagram decal located on the internal horizontal panel.

To access the reconnect/input supply connection blocks, remove the 8 screws that secure the case top of the welder and remove the case top.

INPUT FUSE AND SUPPLY WIRE CONSIDERATIONS

Refer to Specification in this Installation Section for recommended fuse, wire sizes and type of the copper wires. Fuse the input circuit with the recommended super lag fuse or delay type breakers (also called "inverse time" or "thermal/magnetic" circuit breakers). Choose input and grounding wire size according to local or national electrical codes. Using input wire sizes, fuses or circuit breakers smaller than recom- mended may result in "nuisance" shut-offs from welder inrush currents, even if the machine is not being used at high currents.

FIGURE A-1

POWER SUPPLY ACCESS HOLE

• Route input power cable through this hole.

POWER SUPPLY TERMINAL BLOCK

•Line Cord/Cable attaches here.

•A ground terminal marked with the symbol shown

is provided separate from this block for connecting the ground lead of the line cord. (See your local and national electrical codes for proper grounding methods.)

INSTALLATION