ELECTRONICS
as well as a high, low-impedance current-carrying capacity and dissipation, while ensuring minimal heating. EMC shielding quality is proven by measuring the transfer impedance – the lower the delta of the transfer impedance, the higher the EMC shielding effectiveness; standard requirements are < 2.5 mΩ/m at 2 MHz or < 5 mΩ/m at 30 MHz. Evolution EMC features significantly lower impedance values than most other solutions in the market and ensures protection even at extreme operating temperatures down to -40 °C and up to +140 °C. Connections between DC/DC converters and any ancillary equipment must also meet the highest standards due to the high switching frequencies, which require EMC shielding that ensures lifelong reliability. Overall, the entire vehicle high-voltage electrical system demands high protection levels because of frequent parasitic interference signals. All power and signal lines should be fully EMC- shielded.
NEW 360° CRIMPING TECHNOLOGY Thanks to AGRO’s new axial crimping technology, the shield is connected to the cable sheath with a high retention force over a very short distance. This results in complete stiffening between shield contact and cable sheath, which
complies with the German automotive industry standards LV 214 and LV 215:2017. The glands have been validated in 50 mating cycles with simultaneous testing of the shield contact resistance. The crimped 360° shielding ensures that the shield cannot be damaged after assembly and that the EMC shield contact position is permanently fixed in place. In this respect, as well as with its proven high shield pull-out strength, Evolution EMC exceeds the requirements of automotive manufacturers and offers significantly higher reliability and durability than conventional EMC cable glands with spring shielding. In the latter design, with a coupled sealing and shielding contact solution, the indirect mechanical pressure of the sealing insert on the shielding contact can lead to a loss of shielding attenuation due to different ambient temperatures and thus impair the operational safety of the entire vehicle.
HIGH CURRENT- CARRYING CAPACITY The Evolution EMC cable gland, newly
AXI-PRESS: a handy cordless device using patent-
pending axial crimping technology
developed by AGRO, is designed for protected feed-
through of high- voltage cables with braided
copper shields and cross-sections from 16 mm2 to 120 mm2 as well as multi-core cables with smaller cross- sections. The cable glands, which are available with short or long connection threads in sizes M20 to M32, boast current-carrying capacities up to 200 A, depending on the thread size, and minimal heating. The shielding effectiveness is at least 86 dB in the 100 kHz to 300 MHz frequency range, ensuring reliable protection even against interference caused by high switching frequencies of DC/ DC converters and AC converters. Evolution EMC is approved for an extended temperature range of -40 °C to +140 °C and features an IP68 or IP6K9K degree of protection. The alloy of the metal components consists of lead-free, RoHS-compliant brass, with mechanical properties, corrosion resistance and electromagnetic compatibility compliant with current requirements according to IEC EN 62444 and UL 514B. The range of accessories includes dust caps, locking screws, EMC counter nuts for mounting on thin or painted sheets as well as anti-kink nozzles.
Easy to assemble and highly reliable: The new solution combines the advantages of pluggable connectors with those of cable glands
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www.engineerlive.com
Markus Häfliger is the Innovation Driver eMobility at AGRO AG.
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