Laksono, Heru Dibyo, et al. “Design of Protection Relay Coordination Settings and Connecting to PLC Siemens S7-1500 For Load Shadding and HMI Display at PT. Semen Padang”. Andalas Journal of Electrical and Electronic Engineering Technology, vol. 2, no. 2, Nov. 2022, pp. 35-42, doi:10.25077/ajeeet.v2i2.24.