Eight problems in using high voltage resistant insulating gloves

1、 The insulating gloves are different from the ordinary protective gloves The insulating gloves are different from the ordinary gloves in design The insulating gloves are made of insulating rubber material in structural design The insulating layer forms a closed insulation system to protect the hands But ordinary gloves are not made of insulating materials, which have low insulating property and are easy to leak electricity Insulating gloves shall be subject to electrical performance inspection before delivery, while ordinary gloves do not have such requirements 2 Why should insulating gloves be worn in dry state? It is a problem that users must pay attention to when wearing insulating gloves in dry state, because if the insulating gloves contain certain moisture, the volume resistance and surface resistance of the insulator will be greatly reduced Water is a conductor, because of the existence of water, the insulation performance of insulator is greatly reduced or even destroyed In addition, there are many impurities in the water In some specific cases (such as heat, light, electricity, etc.) chemical changes occur to form a conductive body, damaging the insulation performance, so keeping the insulating gloves dry can greatly improve the safety performance III what are the main indicators for determining the insulating gloves? The purpose of wearing insulating gloves is to prevent electric shock injury is mainly caused by human body passing through the current Therefore, the protection performance of insulating gloves mainly depends on the size of the leakage current passing under a certain voltage If the leakage current is within the safe current value range, it is safe, otherwise it is unsafe If a certain voltage is applied, although no breakdown is caused, the excessive leakage current will also cause human injury IV why do we need to carry out preventive test on insulating gloves? Carrying out preventive test is a strict regulation of the power industry to ensure personal safety The period of validity of insulating gloves is relatively long In a long period of time, due to changes caused by aging effect or storage conditions, from the perspective of safety, it is necessary for users to carry out preventive tests before use The insulating gloves beyond the warranty period must be subject to preventive test and can only be used after passing the test V what should I pay attention to when I wear insulating gloves for outdoor work in rainy days? When I work for an electrician, sometimes the labor intensity increases or the weather temperature is high If I accidentally touch the wall or the grounding equipment, I will also be injured by electricity in case of electric leakage Therefore, although I wear insulating boots and shoes, I must prevent other parts of my body from grounding when I work In rainy weather, even if you wear insulated boots or gloves, you must be equipped with necessary rain gear Prevent electric injury of limbs caused by moisture and conduction of insulating protective equipment Vi what is the difference between insulating gloves for live working and rubber high and low voltage insulating gloves? Insulating gloves for live working are allowed to work live within different types of voltage range High and low voltage insulating gloves are auxiliary safety appliances, and live working is not allowed The insulating gloves for live working purchased by users can be subject to routine test and inspection according to different models Whether it is qualified and whether the leakage current is less than 16 MA (specification with length of 410 mm) 7 How to define the low withstand voltage of insulating gloves? Low withstand voltage means that when the voltage rises to 30 kV at the same rate of voltage rise, the power is cut off immediately by voltage drop The routine test (delivery test requirements) is to test for 1 minute under different types of verification voltage (without soaking for 16 hours) The factory test of the brand insulating gloves is 3 minutes There is no regulation of pre immersion and no test of low withstand voltage which is much higher than the test voltage 8 Why do insulating gloves crack in the test During the high-voltage test of insulating gloves for live working, because the water injection height is not standard or the part of the glove cuff that is not immersed in water is not dry, there is an electric arc between the two stages under high pressure, and the electric discharge in the air will produce a sound of bell, ionize the air at the same time, ionize the oxygen in the air into ozone When the concentration of ozone increases, it will cause great oxidative damage to the rubber, resulting in Rubber cracking damage, high-pressure test is a damage test for rubber, and the test is damaged once, so it is required to carry out preventive test in use to ensure the safety of users.