Connection technology for endangered areas
Secure connection of high-precision measuring sensors in a flameproof enclosure
Requirement
A manufacturer of high-precision laboratory measuring devices and process measurement systems that offers customized automation and robotics solutions worldwide had questions and problems regarding the safe connection of flameproof devices in hazardous areas. How do you safely connect a cable to flameproof devices? This question arose. The topic is extremely important because a protection system is only as strong as its weakest component. Thanks to its many years of expertise, SAMCON was able to help in the search for suitable cables and cable entries for hazardous areas.
To ensure the safe connection of flameproof devices, two major rules must be observed. One is Chapter 9 from the installation standard DIN 60079-14 and the other is Appendix E from the installation standard DIN 60079-14. Both chapters require properties of cables and lines. Both the pressure resistance, the UV resistance, roundness, the longitudinal breathability, as well as the flame retardancy, etc. Annex E describes how a cable is to be tested. This is where SAMCON came into play. The manufacturer had already used cables to connect its pressure-resistant sensors, but was unsure whether these were suitable.
Our task was, on the one hand, to test the cables already used for their suitability. SAMCON has developed a static and dynamic overpressure test for cable and cable entry combinations for the Ex area (according to Appendix E) specifically for this purpose. The testing of the cable pressure resistance in relation to the reference pressures of the on-site housings: what explosion pressure, dynamic and static, the cable can withstand, was carried out by SAMCON.
Further information on this question can be found in our brochure
https://www.samcon.eu/en/company/report-ex-cables/
All existing cables were checked and, if necessary, replaced with cables specially developed by SAMCON for hazardous areas. In addition to the development of suitable tests, the project also included the creation of protocols and the sending of calibration certificates to the customer (to ensure the suitability of the existing cables).
video "Cables for hazardous areas in combination with ex-d housings"
Testimonial:
“We were impressed, from the academic exchange to the qualified metrological inspection and corresponding conformity statements of SAMCON.”
