In order to standardize the calculation and setting of underground power supply system protection，Ensure m88 best betting websitethe safety and reliability of the power supply system，September 11，North Shaanxi Mining Company organized a special training on coal mine power supply design and relay protection setting calculation，30 management and technical personnel from the mine participated in the training。

Experts from Hefei Mingxin Software Technology Co., Ltd. are invited to teach this training，Mainly focusing on the definition of "three major protections" underground、Basic principles and setting calculation methods of three-stage current protection、Calculation method for transformer integral and switch fixed protection、High and low voltage short circuit current calculation method、Coal mine leakage protection refuses to operate、Explain in detail the cause analysis and solutions of malfunction，There are many real-life cases interspersed during the lecture，Achieved the effect of combining theory and practice。

During training，M88 gameParticipants listen carefully、Active communication、Record carefully，The instructor pointed out the problems found by the students in the power supply system protection setting process during actual work、On-site explanation and technical guidance on difficult points。Passed this training，The protection and setting calculation business level of professional technicians in the power supply of various mines has been further improved，Laying a solid foundation for continuously improving m88 best betting websitethe safety and reliability of the power supply system of each unit。(Gao Weihong Chen Rui)