Bunmat A. Magnetic Field Modeling of a Single-Arm Pantograph a 25 kV Overhead Power Transmission System for Electric Railway Using a 3D Finite Element Method. J. Eng. Inn. Res. [internet]. 2023 Dec. 28 [cited 2026 Sep. 29];1(2):25-33. available from: https://ph03.tci-thaijo.org/index.php/JEIRKKC/article/view/1106