Today, professional training on manufacturing and testing technology of surge protectors (SPD) for low-voltage power distribution systems was successfully held in Yueqing City, Zhejiang Province. The training aims to enhance the professional skills of industry personnel in the manufacturing process, performance testing and quality control of surge protectors, and further promote the development of safety protection technology for low-voltage power distribution systems in my country. The training was jointly organized by relevant departments of Yueqing City and a number of professional institutions, and domestic well-known surge protector experts, scholars and industry elites with rich practical experience were invited to give lectures. The training content covers the basic principles, design selection, production process, performance testing methods, quality control standards and practical application case analysis of surge protectors.

During the training, experts introduced the relevant knowledge of surge protectors in a simple and easy-to-understand manner through theoretical explanations, on-site demonstrations, interactive exchanges and other forms. At the same time, practical activities such as visits to surge protector manufacturing companies and laboratories were organized to allow trainees to observe the production process and testing process of surge protectors up close, and deepen their understanding of theoretical knowledge. In order to improve the manufacturing level of surge protectors in China, standardize the market order, and change the current situation of mixed products and uneven product quality in the low-voltage distribution system surge protector market, this "Low-voltage Distribution System Surge Protector Manufacturing and Testing Technology Training" is specially held. This training is based on the two standards "GB/T 18802.11-2020 Low-voltage Surge Protector (SPD) Part 11: Surge Protector for Low-voltage Power System Performance Requirements and Test Methods" and "GB/T21431-2023 Technical Specifications for Testing Lightning Protection Devices for Buildings", strengthening the design, production, testing, selection, installation and other series of issues of surge protectors. Certificates will be issued after assessment.

The training topics are divided into the following four parts

1. Testing technology of surge protector for low voltage power supply system - test instrument and type test (safety test part) - Sun Yong

Contents:

1. "Test technology of surge protector for low voltage power supply system" Chapter 3 - Test instrument

1.1. Impulse current generator (8/20μs & 10/350μs)

1.2. Impulse voltage generator (1.2/50μs)

1.3. Composite wave generator (1.2/50μs & 8/20μs)2. "Testing Technology of Surge Protectors for Low Voltage Power Systems" Chapter 5 - Type Test Methods

2.1. TOV caused by faults in low voltage and high (medium) voltage systems

2.2. Short-circuit current characteristic experiment

2.3. Additional test to simulate SPD failure mode

2. Testing Technology of Surge Protectors for Low Voltage Power Systems - Introduction and Type Test (Impact Test Part) - Chai Jian

Contents:

1. Chapter 1 - Introduction

1.1. Development of SPD Test Standards

1.2. Overview of Test Centers

2. Chapter 5 - Type Test Methods

2.1. Limiting Voltage

2.2. Action load

2.3. Tracking resistance

3. Application selection and completion inspection of surge protectors in low-voltage power distribution systems - Song Pingjian

Contents:

I. Selection and application of power supply protectors (SPDs)

II. On-site inspection of SPDs in low-voltage power distribution systems

4. Access to surge protectors at home and abroad - Wang Jiaan

Contents:

I. China access requirements

II. Multi-country access

Tor Lightning Protection also actively participated in this training, which has consolidated the technical inspection work of the company's junior technical personnel, the use of the company's testing equipment, and the understanding of testing theory knowledge. It is reported that Yueqing City, as one of the important bases of the electrical industry, has many electrical product manufacturing companies, of which surge protector manufacturers account for a certain proportion. This training promoted the exchange and cooperation of the surge protector manufacturing industry in Yueqing City, and provided strong support for promoting the transformation, upgrading and high-quality development of the local surge protector manufacturing industry.