You're going to have to provide some more info with regard to value. P&H Chemetron made many industrial welding machines. What model and what features? Is is strictly an AC stick machine, or an AC/DC machine, or does it also have TIG welding capability?
Most importantly, does it run on single phase power or industrial three-phase. Most P&H welders were heavy duty industrial machines, hence they may require a dedicated electrical circuit, or at the very least a high amperage circuit.
A few pics may help to ID the kind of machine you have. The power requirements should be in plain view on the front of the machine.