Bending resilience study for communication cables at the low negative temperatures

The article presents the results of the analysis of the normative-technical documentation and the test methods for assessing the resilience of communication cables to negative temperatures. The method of testing the resilience to low temperatures for the protective polyethylene sheath of cable and for the cable itself is considered. Based on the analysis performed, a method of bending resilience testing at an ambient temperature of minus 60 degrees Celsius is proposed. According to the proposed method, two samples of communication cables were studied: symmetric high-frequency cable with film-porous-film polyethylene insulation and symmetric high-frequency communication cable with cord-polystyrene insulation. The results of experimental studies show a high resilience of the outer polyethylene sheath of tested cable samples.