Abstarct: Superconductors which were discovered in 1911, in low temperatures has two magnificent properties. These properties are very low resistivity and perfect diamagnetism. The aforementioned properties cause the feasibility of using superconductors in many power apparatuses, being assessed. This has resulted in the appearance of a concept as “High Temperature Superconducting cables” or HTS cables. HTS cables can transmit the same amount of the electrical energy of the conventional lines, at 20% of their nominal voltages. In fact, the same voltage, HTS cables are capable of transmitting a 5-to-10-time larger power in comparison to normal lines. These cables have different various electromagnetic, thermal, dielectric, and mechanical structures. According to the considerations of costumer, every one of these structures could be utilized. In this dissertation, a 22.9 kV cold dielectric and coaxial HTS cable is studied. The electromagnetic, thermal, and mechanical behavior of this cable is analyzed through an equivalent circuit model (ECM). The most significant properties of this model are the consideration of electromagnetic and mechanical impacts of twisted tapes and the sectionizing the superconducting tape. This model has been provided to analyze the transient behavior of the HTS cable under different contingencies of the test system, such as fault resistance, fault type, and fault duration. In fact, the aforementioned parameters have not been discussed or are discussed very shortly. Also, this dissertation is the presenter of the first ECM of HTS cables, with electrothermal, magnetic, and mechanical capabilities. The results of this dissertation are the proof of the significant impact of system parameters on the transient behavior of HTS cables. Fault resistance as one of the most important of factors in analyzing the transient behavior of HTS cables, have an outstanding impact on the fault current level and its first peak. By the increment of this factor, fault current level decreases. This can result in the flux flow state of the tapes and jeopardizes their safety. Fault type and engaged phases in fault are other important factors which have magnificent impact on the applied Lorentz force. The simultaneous impact of these two parameters have been discussed sufficiently in another subsection. At last, fault duration and recovery times are also discussed.