详情描述

Employees (operators) wearing synthetic clothing and moving around can easily generate static discharge. Similarly, friction, stirring, and movement of packaging products or周转 equipment in high-temperature rooms can also produce static electricity. The static electricity can easily cause electronic components to break down and burn, affecting the accuracy of detection equipment and instruments, and can also cause computer systems to malfunction. The sparks generated by static electricity are sufficient to ignite and explode flammable and explosive gases like natural gas, oil, and alcohol. Therefore, proper grounding is required for equipment, containers, and pipelines prone to static electricity, as well as for production processes that are prone to static electricity. Grounding refers to making an electrical connection between a specific point in a system, device, or equipment and the local ground (earth). Thus, the lower the resistance, the faster the current flows, and the higher the level (or safer) of equipment (or grade) that can be protected. Additionally, good grounding can effectively reduce static noise in computer systems caused by potential variations.

Types of grounding: working grounding, protective grounding, static electricity grounding, lightning protection grounding, multiple grounding, equipotential grounding, shielding grounding, signal grounding for electronic equipment, power grounding for electronic equipment, etc.

Based on international and domestic standards: The static grounding resistance values (earth resistance values) are divided into three grades:

        ①.≤1Ω; ②.≤4Ω; ③.≤10Ω; 

General Requirements:

Communication Worksite: ≤4Ω

Safety Protection Resistance: ≤4Ω

Anti-static grounding: ≤4Ω

Lightning Protection and Grounding: ≤10Ω

Manufacturers or laboratories can select the appropriate ground resistance value based on their own environmental requirements.

Recommendation: The general factory ground resistance value can be required to be ≤10Ω (but if all equipment needs to be connected, the ground resistance value should be ≤4Ω). For example, in chemical factories (factories producing hazardous chemicals) and factories that produce and process flammable and explosive gases, the ground resistance value should be required to be ≤4Ω or higher. For electronic factories, semiconductor factories, inspection laboratories, and computer systems (cleanrooms of 100 grade or above, electronic components with withstand voltage not exceeding 100V), the ground resistance value should be required to be ≤4Ω or higher.

Guangzhou Lihuang Antistatic Technology Co., Ltd. has years of experience in the construction and renovation of static grounding and indoor wiring systems. We have professional technical staff and construction teams that can provide technical references based on your production or safety environment, and suggest the appropriate resistance value for the standard level. Welcome all manufacturers and companies to inquire and place orders. Thank you!