Mitigation 2017-11-05T05:21:53+00:00

Mitigation

WDR Electromagnetics’ mitigation services fall within two primary categories: wiring correction and remediation, and shielding.

◆ Wiring Correction and Remediation

Risks of shock and of potential fire hazards exist when a structure is not wired according to the NEC. Additionally, a host of code violations create interference issues. Some of these issues include, but are not limited to: 

  • Improperly wired three-way switches (In almost all instances, three-wire travelers should be used between switches.)
  • N-G shorts
  • Plumbing currents

The listed specific code violations create an alternate path for return current.  In these specific instances, circuit breakers will not trip, so these violations go unnoticed despite the havoc it wreaks on the electrical system and the safety issues it poses. The natural 180-degree phase cancellation effect, which is present in all correctly wired circuits, is not occurring.  Shielding, twisting and shielded cables do not remedy these situations. Rather, the wiring error must be investigated and corrected. WDR’s experienced team of electricians offers complete remediation services with their own unique troubleshooting processes, and it embraces a plethora of other natural cancellation methodologies to ensure complete NEC compliancy for safer immediate and long-term results. 

emf challenges wdr electromagnetics

◆ Shielding

WDR Electromagnetics maintains that shielding, a mitigation method used to essentially block electromagnetic radiation/interference, should be used only in specific applications and as an absolute last resort. It must be noted that most field remediation efforts to address EMI issues in sensitive equipment can be extremely successful without the use of such an expensive application.

When necessary, however, a host of shielding techniques and materials are available, such as highly conductive and permeable metal plates for electromagnetic fields to complete enclosures for radio frequency fields. Which techniques and materials are used depends upon the type of frequency that needs attenuating.

WDR Electromagnetics works in close collaboration with a world-renown shielding engineering expert that has a proven track record of success to ensure all aspects of clients’ projects are completed in a highly professional, timely, and cost-effective fashion.

◆ Shield Considerations

Many factors affect a shield’s performance. Some of those factors that are included in the design process include:

  • Permeability and saturation of the materials used in the shield must be considered in addition to the type of anneal.
  • Spherical and cylindrical shaped shields are typically needed, and special handling of joints and seams must be considered to reduce leakage. These methods are employed by the usage of specialty welding techniques as fields resist making sharp turns.
  • Shields perform better with increased usage of layers. Thickness of the shield is determined by how much attenuation is needed.
  • Other absolutely necessary considerations include, but are not limited to: orientation of the field as it hits the shield, strength, distance, and frequency of the field, as well as temperature of the shield location, vibration, and weight.