en Power Quality Power Quality Only For Articles of ELECRiS 2024 Only For Articles of ELECRiS 2024 <span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">In order to solve the difficulty of digital signal calibration of electric power equipment, such as low precision, inability to test the full range, and complicated configuration, and further promote the development of power system, a proposed time measurement calibration device is designed, and its performance is verified in this paper. This paper points out the main drawbacks of the existing calibration system, carries on the design innovation of the key technologies based on FPGA (Field Programmable Gate Array), puts forward the optimization method of the software and hardware, and verifies the accuracy of the input and output signal by experiments. The accuracy of input and output SV, GOOSE, and contact signal of the proposed calibration device in this paper can be better than 10&mu;s, which is a meaningful improvement in accuracy and efficiency for time measurement calibration.</span></span> Electric power equipment, time measurement, calibration, Field Programmable Gate Array 193 202 http://ijeee.iust.ac.ir/browse.php?a_code=A-10-5519-2&slc_lang=en&sid=1 Huang Yan yhuang@swinburne.edu.my 1800319475328460016533 1800319475328460016533 No Faculty of Engineering, Computing and Science, Swinburne University of Technology Sarawak Campus, Kuching 93350, Sarawak, Malaysia. hadi nabipour afrouzi hadi.nabipourafrouzi@bcu.ac.uk 1800319475328460016534 1800319475328460016534 Yes College of Engineering, Faculty of Computing, Engineering and the Built Environment, Birmingham City University, Birmingham B4 7XG, West Midlands, England, United Kingdom. Chin-Leong Wooi clwooi@unimap.edu.my 1800319475328460016535 1800319475328460016535 No HVTrans, Centre of Excellence for Renewable Energy (CERE), Faculty of Electrical Engineering Technology, Universiti Malaysia Perlis, Arau, Perlis, Malaysia. Hieng Tiong Su hsu@swinburne.edu.my 1800319475328460016536 1800319475328460016536 No Faculty of Engineering, Computing and Science, Swinburne University of Technology Sarawak Campus, Kuching 93350, Sarawak, Malaysia. Ismat Hijazin ihijazin@swin.edu.au 1800319475328460016537 1800319475328460016537 No School of Engineering, Swinburne University of Technology, Melbourne, Australia.