Lincoln Electric 11226, 11124 manual System Connection, System Overview

A-4 INSTALLATION A-4

SYSTEM CONNECTION

System Overview

The Power Wave AC/DC 1000 power source is designed to be a part of a modular welding system typically controlled by a Power Feed 10A Controller or customer supplied Programmable Logic Controller (PLC). Each welding arc may be driven by a single power source or by a number of power sources connected in parallel. The actual number of power sources per arc will vary depending on the application. When only one power source is required for an arc group, it must be configured as a Master. When multiple parallel machines are required, one is designated as the Master and the rest as Slaves. The Master controls the AC switching for the arc group, and the Slaves respond accordingly.

When employed in a multi-arc AC system it is benefi- cial to synchronize the arcs to each other. The Master for each arc can be configured to follow a dedicated external synchronization signal to determine its fre- quency and balance. The optional Power Wave System Interface provides the means to synchronize the AC wave shapes of up to four different arcs to a common carrier frequency. This frequency can range from 10 hertz to 300 hertz, with the most practical range being 10 to 100 hertz. It can also control the phase angle between arcs to reduce the effects of welding related issues such as "Arc Blow".

The arc to arc phase relationship is determined by the timing of each arc’s "sync" signal relative to the "sync" signal of ARC 1.

In a typical multi-arc system, each arc is controlled by its own Power Feed 10A Controller. The basic charac- teristics of the individual arcs such as WFS, ampli- tude, and offset are set locally by each arc’s dedicated controller. The frequency, balance, and phase shift parameters of each arc are controlled by the Power Feed 10A Controller for ARC 1, which must be con- nected to its Master through the Power Wave System Interface (see multi-arc Connection Diagrams on the next few pages).

A PLC interface is an alternate method of control for larger systems. The PLC is typically connected via DeviceNet directly to the Power Wave System Interface, and the Master power source of each arc group in the system.

The following list of Recommended and Optional equipment is included as a reference for the follow- ing connection diagrams. The connection diagrams describe the layout of three typical systems. Each diagram has a step by step Installation Checklist. Additionally, a dedicated diagram has been provided detailing the parallel connection of machines for extra output capacity which can be applied to the system diagrams as required.

POWER WAVE® AC/DC 1000