Insulation gloves common problems highlights

Insulating gloves are commonly used safety tools and important insulation protection equipment in power operation maintenance and overhaul tests. With the development of the power industry and the promotion of live working techniques, more stringent requirements have been put on the safety performance of insulating gloves.

1. What is the difference between insulated gloves and ordinary protective gloves?

The insulation heel is different from the ordinary safety shoes. Insulation shoes are made of insulating rubber material in the structural design. The insulation layer forms a closed insulation system to protect the foot. The soles and sponges of ordinary safety shoes are not insulating materials, and the insulation performance is very low and they are prone to leakage. Insulation shoes must be tested for electrical performance before they leave the factory. However, ordinary safety shoes do not have this requirement.

2. Why insulation gloves should be worn in a dry state?

Wearing insulating gloves in the dry state is a must for the user, because if the insulating gloves contain a certain amount of moisture, the volume resistance and the surface resistance of the insulating body are greatly reduced. Water is a conductor. Due to the presence of water, the insulating properties of the insulator are greatly reduced or even destroyed. In addition, there are many impurities in the water, in certain circumstances (such as heat, light, electricity, etc.) chemical changes and the formation of electrical conductors, destroy the insulation properties, so keep the insulating gloves dry, can greatly improve the safety performance.

3. What is the most important indicator for determining insulation gloves?

The purpose of wearing insulated gloves is to prevent electric shock caused mainly by the human body through the current, so the protective performance of insulating gloves depends mainly on the size of the leakage current through a certain voltage, if the leakage current is within the safe current value range It is safe, otherwise it is not safe. If a certain voltage is applied, although no breakdown is caused, excessive leakage current also causes human injury.

4. Why do preventive tests for insulating gloves?

Conducting preventive tests is a strict provision of the power industry that guarantees the safety of the person. Insulating gloves have a long shelf life. For a long period of time, due to changes in their aging or storage conditions, from the safety point of view, it is necessary for users to conduct preventive tests before use. Insulative gloves that have exceeded the shelf life must be tested for preventive use.

5. Wear insulated gloves.

When working in an electrician, sometimes the labor intensity is increased or the weather temperature is high. Inadvertently, the limb part touches a wall or a grounded device. When an electric leakage is encountered, electric shock is also caused. Therefore, although the insulated boots must be worn during work, the other parts of the limb must be prevented. Partial grounding. In rainy weather, although insulated boots or insulated gloves are worn, necessary rain gear must be provided. Prevent the insulation protector from electric shock caused by moisture conduction.

6. What is the difference between insulating gloves for live working and rubber high and low voltage insulating gloves?

Insulating gloves for live working allow live work in different voltage ranges. High and low voltage insulated gloves are auxiliary safety devices that do not allow live operation. Users can purchase insulation gloves for live work according to different types of conventional test. Compliance is checked and the leakage current is less than 16mA (size 410mm in length).

7. How to define the minimum withstand voltage of insulating gloves?

The lowest withstand voltage, that is, rises to 30 kV at the same boosting rate, that is, the voltage is cut off immediately. Routine test (factory test requirements) is to test for 1 minute under different types of verification voltage (without soaking for 16 hours). The brand insulation gloves factory test is 3 minutes, high and low voltage insulation gloves, there is no pre-immersion regulations, but not much lower than the test voltage minimum withstand voltage test.

8. Insulation gloves in the test why some cracks?

For high-voltage tests on live working insulating gloves, an arc is generated between the two levels under high pressure because the height of the water injection is not standard or the parts of the gloves that are not submerged in water are not dry, and the electric discharge occurs in the air to generate the sound of the buzzer and the air Ionization produces ionization of oxygen in the air into ozone. When the concentration of ozone increases, it causes great oxidative damage to rubber and causes cracking and destruction of rubber. The high-pressure test is a destruction test for rubber, and the test is to be destroyed once. Therefore, it is stipulated that preventive testing should be conducted during use to ensure the safety of users.

Copyright Statement: This article is a reprint of online media, and it only represents the author's point of view. It has nothing to do with this site. If news articles and comments infringe your legal rights, please call us and we will handle it in a timely manner.