Design Objectives | System Study | Mitigation Proposal | Performance Guarantee

THE PQI SOLUTION^™

The PQI Solution™, which has been refined by over thirty years of harmonic mitigating experience, includes:

• A Statement of Design Objectives

• A comprehensive System Study

• A detailed Mitigation Proposal

• A system Performance Guaranteed

The PQI Solution™ is in addition to any other design objectives and applicable code requirements.

To influence the design of a new electrical distribution system, our Engineering Support Department often asks designers for their 'preliminary' drawings. Experience has taught us that it is unrealistic to expect that an engineer will have the time or budget to make significant changes to a system design that has progressed much beyond the preliminary stage, even when the benefits are overwhelming.

Similarly, the mitigation of load-generated harmonics in an existing system may require a review of 'as-built' drawings. The replacement of healthy transformers, whether conventional or K-Rated, may not be required with the application of zero sequence harmonic filters. Although this solution would not result in an optimized system design, the reduction of zero sequence harmonic currents, alone, may result in an acceptable 'power quality' outcome.

These services are normally offered to facility owners or their consulting engineers on a free-of-charge basis.
 

DESIGN OBJECTIVES

To resolve all of the issues that normally result from a non-mitigating 'conventional design', the Design Objectives must include:

• Harmonic Current Control
• Voltage Distortion Reduction (<5% THDv)
• Common Mode Noise (<4V)
• CMN Reduction (<2V)
• Capital Cost Reduction
• Operating Cost Reduction

These objectives are detailed in a 'Harmonic Mitigation Specification', which is available from PQI for inclusion in the 'General Requirements' of an engineer's electrical specification.

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SYSTEM STUDY

A System Study is completed for the existing or proposed 'conventional design' and all 'harmonic mitigating design' alternatives. The study, which is based on information provided by the engineer, includes a detailed analysis of the system's performance, power quality and costs.

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MITIGATION PROPOSAL

The Mitigation Proposal includes a detailed summary of PQI product application sites, ratings, models and budgetary estimates. A proposal may also include the application logic, product specifications, connection diagrams, engineering notes and recommendations regarding system revisions, operation and loading.

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PERFORMANCE GUARANTEE

A fully implemented PQI solution includes a Performance Guarantee. This guarantee ensures that all system performance, power quality and cost issues, which are detailed in The Harmonic Problem, will be resolved.

PQI is the only manufacturer that can provide this Performance Guarantee, in every situation, with the system loaded to maximum allowable NEC levels. This claim is based on PQI's ability to control critical harmonic currents at their source. The guarantee often requires the application of PQI's patented and patent pending products, system configuration alternatives.

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