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Electromagnetic Interference (EMI)

Shield Grounding and EMI Protection – Part 2

EMI, the concept of electromagnetic interference, is a relatively simple one to convey: radiated energy from other sources induces a voltage in another circuit. But like many things, the simplicity of its description belies the true complexity of mitigating it. Shielding of signal wires, wire harness shielding, shielding of power wires, induced noise studies are […] Read more

Shield Grounding and EMI Protection

The push for more electric aircraft is driven by weight savings and the availability of reliable electrical components. This is made possible with greater power generating capacity, however, this comes with an increased challenge of ensuring reliable data transmission. More power flowing through the aircraft means higher levels of electromagnetic interference (EMI). Aerospace environmental test […] Read more

Does a Connector’s Plating Type Impact Performance?

Design and installation of an aircraft’s electrical system has been made significantly easier with the adoption of modular harness design. This design pattern allows for discrete wiring sections to be designed and fabricated; this is only possible with the reliable performance of connectors. The connector-ization of harnesses has led some OEMs to build platforms where […] Read more

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