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Testing & Assessment

Evaluating Secondary Wire Harness Protection Performance

There are several reasons to deploy secondary harness protection (SHP): chafe protection, maintenance protection, fire protection, harness cable management and, in some cases, arc protection. The EN6059-502 test examines secondary harness protections and the potential damage from arcing. This article runs through the test method and problems that could occur if the results are misinterpreted. […] Read more

Power over Ethernet and Potential Application Problems

The primary purpose of power over ethernet (PoE) is to use a single ethernet cable to provide a datalink and low-level power to devices. Since PoE became standardized in 2003, it has been implemented on a large range of ground based applications. There are several benefits to this implementation which include cable that is easily […] Read more

Why use Lectromec for your Testing?

Not all testing is created equal. We have all seen the results of poorly performed tests – not only do they result in a waste of money, but also a waste of time – and when testing is delaying a product to market, the costs can be huge. Even with that in mind, it can […] Read more

Maximizing Electrical Component Performance

Most components for electrical systems will have an accompanying product specification or product information sheet. These information sheets contain a lot of information that include mechanical, thermal, and electrical performance and this information is regularly used by engineers to make technical decisions. This performance information is necessary to reduce engineering time and avoid the need […] Read more

How to Derate a Wire Harness

One of the question that we frequently receive at Lectromec is regarding the derating of wire harnesses. For those unfamiliar with the topic, we have covered this extensively in past articles. The quick summary of this is that due to the temperature rating of a wire, there is only a certain amount of electrical current […] Read more

Lectromec’s Testing Process

Testing can be complex. From test identification, locking down on test parameters, sample preparation, accurate test performance, proper data analysis, and delivery of a final report, an error anywhere in the process can cause costly delays and spurious results. Using the correct laboratory for testing is undoubtedly important. This article provides an overview of how […] Read more

Basics of Connectors

Circular connectors have been a part of the aircraft industry for nearly 90 years. Clearly, because of this long history, many lessons have been learned on the construction and use of these connectors. But before anyone can really consider how to use the connector, there are basics that must be understood. This article reviews some […] Read more

Space Certified Wires and Cables

In the last three months, Lectromec has been asked numerous times about “Space Certified Wires” (SCW). The basic premise of these questions has been whether there is a defined set of criteria that would show a wire or cable is suitable for space applications. The primary concern raised is can there be a single set […] 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