With the continuous development of the construction industry, great changes have been brought to our urban construction. When we see tall buildings rising from the ground, these are inseparable from the contribution of the electric climbing hoist. It brings great changes to the construction of tall buildings. A lot of convenience. Climbing frame electric hoist appeared in the market, and it has been loved by many construction site friends. It can save project time to a large extent. At the same time, in order to ensure the safe and smooth completion of the work, each climbing frame hoist will carry out leakage detection before leaving the factory. The hoist mainly relies on "electricity" to operate, so there will be occasional leakage in the test. However, through careful production procedures, this situation rarely occurs. However, in order to ensure safety, the electric hoist requires a leakage inspection before leaving the factory. Leakage is the leakage of current due to insulation damage or other reasons. If there is a certain potential difference between the electrical shell and the mains live wire after being connected to the ground for some reason, leakage will occur. The way to check for leakage is to use an electric pen to touch the charged body. Assuming that the neon bulb will go out immediately when it is on, it proves that the charged body itself is charged with static electricity; if it is bright, it must be leaking. The leakage detection is also to ensure that the electric hoist is out of factory. An important part of safety is mainly to avoid leakage of electricity when users are in use, which may lead to electric shock.