전선의 허용곡률반경과 턴(TURN)에 따른 발화 가능성 연구

Abstract

In this paper, two tests were performed using the commonly used HFIX(1.5SQ) cable for the purpose of analyzing the impact of a cable’s Cable Bend Radius and Turn on fire risk. In each test, 14A and 16A stationary electrical currents without a functioning molded case circuit breaker (MCCB) were applied respectively for 180 seconds, and then an infrared camera was used to verify the temperature characteristics and the ignition probability. The results of the tests showed that the Cable Bend Radius, within the scope of not causing physical damage to the copper wire or the cable sheath, did not have meaningful impact upon thermal accumulation. For the Turn however, there was a linear increase in the temperature of the cable even within the range of allowable current of the cable as the number of Turn increased, verifying the risk of fire from the cable sheath. Therefore, to minimize the risk of cable fires, the cable must be correctly used at all times and constant preventive actions through maintenance including regular inspection and repairs are needed.