Operating instructions

ManualsBrandsARC ManualsPower SupplyInverter Power Sources

004 859 Page 13

SECTION 4 − OTHER EQUIPMENT

4-1. Paralleling DC Constant Voltage Power Sources (Not Recommended)

It is very difficult to balance these machines as they will only balance in a very narrow band of operation; therefore, paralleling is not typically recom-

mended.

4-2. Paralleling Brush Commutator Design Engine Driven Welder/Generators Or Motor

Generators (Not Recommended)

The amperage output of these machines must be exactly balanced, otherwise, one power source tries to drive the other. Paralleling brush commutator

design machines is not recommended for this reason. If the outputs are not exactly balanced, the power source supplying the higher output feeds

current back to the other power source. The current goes through the paralleled connection, through the brushes to the commutator and is dissipated as

heat in the windings. The heat build−up can cause failure of the generator components.

4-3. Paralleling AC Engine Driven Welder/Generators (Not Recommended)

Any fluctuation of engine speed will affect output amperage and frequency resulting in a feedback situation. Paralleling AC engine driven power sources

is not recommended for this reason. If the engine speed fluctuates, the control systems of the power sources do not have synchronization capabilities to

compensate for this fluctuation. The AC output is no longer in phase which can be a hazard for hand−held welding operations. The current feedback

from one power source to the other would cause heat build up in the windings. The heat build−up can cause failure of generator components.

4-4. Paralleling AC Inverter Type Power Sources (Not Recommended)

The control systems of AC inverter power sources do not allow for synchronization of the output when the outputs are not exactly balanced. If the AC

output is not in phase it can be a hazard for hand−held welding operations. The current feedback from one power source to the other would cause heat

build up in the equipment. The heat build−up can cause failure of power source components.