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Electromagnetic Interference (EMI)

Building Wire Harnesses Right

Some of the most important elements to the electrical and electronic functions of aerospace vehicles are the cable and wiring harnesses. Accurate transmission of control and data signals is heavily dependent on the cable reliability, wiring harnesses, and connectors. Best design and maintenance practices are crucial to their longevity and reliability. Eliminating stresses to the […] Read more

Impact of Corona on Electrical Systems

Corona is an area of electrical systems that many have some knowledge, but often only to the point of knowing that there is a voltage that should not be exceeded. It is common knowledge that factors, such as pressure, have an impact on when and how corona will happen, though the source of corona is […] Read more

How many Cables Should be Shielded?

A common question when it comes to designing an aircraft EWIS is which of the cables should be shielded? There are several standards, such as MIL-STD-461, “Requirements for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipment” provide an excellent basis for topics and testing that should be considered. But for those that are […] Read more

Use of Cables on Aircraft – Part 2

In this article, we will continue the discussion by exploring the NEMA27500 cable. Four sections were covered in the Part 1 (Specification, identification and shield coverage, conductor size, and wire specification). The remaining three parts covered here are the basic component wires, shielding materials, and the jacket materials. Read more

Use of Cables on Aircraft – Part 1

Electrical wire cables are an integral part of an aircraft’s Electrical Wire Interconnection System (EWIS). It would be difficult to imagine the design of an aircraft electrical system without the use of electrical cables. The use of cables in aircraft has simplified the formation of wire harnesses and installation of electrical components (think of the […] Read more

4 aspects of wiring selection for special aircraft applications

Not all wires are created equal. Through the years, Lectromec has learned the best practices for wire selection that would ensure the Electrical Wire Interconnect Systems’ (EWIS) longevity. There are thousands of wire standards for the aerospace industry. These include: the National Electrical Manufacturers’ Association (NEMA) standards, the Society of Automotive Engineers (SAE) standards, as […] Read more

How you can protect aircraft electrical systems from EMI

Today’s interview is with Dan Schettler, Product Specialist at Micro-Coax. He talks about how to protect aircraft electrical systems from electronic magnetic interference (EMI). Dan’s company, Micro-Coax, has been in business for over fifty years. They have earned a solid reputation for providing custom technical solutions for wires and cable in challenging environments. The environment […] Read more

What’s next for aircraft EWIS: Carbon nanotubes

This article describes findings from a Rice University study showing the potential for creating new products based on carbon nanotube (CNT) technology. According to the research, CNT fibers have incredible properties that make them ideal for aerospace. For example, they are much stronger and have a greater capacity for carrying current than copper cables of the same mass. Read more

Dealing with EMI and EMV on radio frequency (RF) cables for aerospace applications

Because of this high level of compliance, the task group recommended that the UASs use the AS50881. For those looking to produce UASs, the current guidance outlined in AS50881 is the place to start when developing system design documents. The aerospace industry has been dealing with Electromagnetic Interference (EMI) and Electromagnetic Vulnerability (EMV) since the […] Read more