Frequently Asked Power Questions

Below you will find answers to our most frequently asked questions.

Can I operate a generator set on propane instead of natural gas?

Most natural gas powered generator sets can be converted to run on propane in vapor state.  LPG Vapor conversions are the simplest.  On the Ford ESG642 (4.2L) engine used by many manufacturers, addition of a Link Module and reconnection of one wire to the module is required.  The natural gas regulator would need to be reset and an adjustment would need to be made to the fuel mixer and speed control.

Can a generator set’s output voltage be changed?

Many generator sets have twelve line leads (cables).  Depending on the connections that are made between the load and the generator line leads, single-phase and/or three phase voltages are possible.  When making changes to a generator sets output voltage, consideration needs to be given to the resulting output current.  Replacement of the main circuit breaker is usually required.  Other necessary changes would involve replacing analog type meters in a mechanical control panel, or programming changes to an electronic control panel.

Do you offer dual-fuel or bi-fuel generators?

Most of the diesel-powered generator sets we offer can be converted to bi fuel operation using one of several after-market add-ons that we can install quickly and inexpensively, without making any mechanical or physical alterations to the engine itself. With a bi-fuel add-on, generators can burn up to 70% natural gas, resulting in significant reductions in fuel costs and certain types of emissions. Dual fuel is a different type of engine from bi-fuel. To learn more about the difference, click here. To learn more about bi-fuel technology, click here.

Please contact us for specific detail or for a quote.

What are the maintenance requirements of my generator set?

The operation and maintenance manual for your generator set gives the periodic maintenance required and how frequently it should be performed. Many customers rely on WPP to perform those services through an annual maintenance agreement.

Please contact us for specific detail or for a quote.

How do I determine what size generator set is required for my site?

By providing a summary of the sites different horsepower or amperage loads and the voltages they require, we can use a sizing program to determine your power requirements.  It may be necessary to use a licensed electrician to perform this site survey.

Based on this data we can recommend a generator set that will provide the power your site requires.

What are U.S. EPA Tier 4 regulations and how do they compare to Tier 3/Stage IIIA?

In 2004 the EPA published the final rule introducing Tier 4 emission standards, which are to be phased-in over the period of 2008-2015 The Tier 4 standards require that emissions of particulate matter (PM) and oxides of nitrogen (NOx) be further reduced by about 90%. Tier 4 emissions levels are similar to those required by the 2007-2010 standards for on-highway engines.

When do the new regulations begin to apply?

Tier 4 Interim emissions regulations will be phased in by engine power category, followed by Tier 4 Final standards. The Tier 4 engine power categories are expressed in kilowatts (kW). Tier 4 began in 2008 for all engines under (<) 19 kW, and for those greater than or equal to 19 but less than 56 kW (19 ≤ kW < 56). For engines in the 130 ≤ kW ≤ 560 category, and those in the category for above 560 kW, Tier 4 Interim applies in 2011. Finally, for the 56 to 130 kW (56 ≤ kW < 130) category, Tier 4 Interim applies in 2012. Tier 4 Final standards generally are applicable three years after the Tier 4 Interim start date.

Do Tier 4 regulations only impact the US?

Similar regulations will impact the European Union and likely Canada and Japan. In the EU the regulations are called Stage IIIB/IV; in Japan they are called Step 4. Neither Japan nor Canada have completed adoption of Tier 4/Step 4, but we expect them to do so in the near future. In the EU the regulations do not apply to engines < 19 kw or engines > 560 kW at this time and we expect Japan to be the same as the EU. The regulation in Canada is expected to be essentially identical to the U.S. regulation.

What is Tier 4 Interim vs. Tier 4 Final (Stage IIIB/Stage IV)?

Tier 4 Interim regulations begin in 2011 for most power categories and Tier 4 Final is phased beginning in 2014. Tier 4 Interim is intended to enable a gradual phase in to final regulations for manufacturers. Tier 4 Final regulations require additional reductions in NOx. Alternative phase-in periods from Interim to Final are intended to provide time to transfer technology from highway engines to non-road engines.

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