NWL, Inc. 

Power Supplies for ESPs

Power Supplies for ESPs

NWL is the leading manufacturer of high voltage/high frequency switch mode technology power supplies for use in powering electrostatic precipitators (ESPs). PowerPlus™ units integrate the controller, the current limiting element and the T/R set functions into one compact high voltage power supply for use on the ESP.

PowerPlus™ Models

NWL offers the following PowerPlus™ models shown by kV rating:

• 70kV – used with 300mm plate spacing
• 83kV – used with 400mm plate spacing
• 100kV – used with 500mm plate spacing

PowerPlus Design Features

Carrying on the tradition of supplying the most advanced power supplies for electrostatic precipitators, NWL began design and manufacturing of the PowerPlus™ in 2000. The use of Insulated Gate Bipolar Transistors (IGBT) provides for a power supply design that operates at a much higher frequency when compared to the operating frequency of a conventional single phase unit.

NWL’s unique integrated design, places the power supply and control system on a common assembly. The system is packaged in a NEMA 4 (IP56) rated design for outdoor installations. NWL also has a complete line of mechanical switch designs to facilitate retrofit or new installations.

PowerPlus Benefits

The NWL PowerPlus™ has been installed on precipitators in many different industries and applications throughout the world. This product has proven to provide the following benefits to its users:

• Increased collection efficiency
• Decreased kVA for the same amount of power applied to the field
• Faster spark response with less wasted spark current
• Higher Reliability
• Significantly higher power factor when compared to a conventional TR
• Lower initial installation cost
• Reduced space requirement with integrated design
• Able to facilitate buss and guard or cable for HV connection