2024 Author: Howard Calhoun | [email protected]. Last modified: 2023-12-17 10:16
Safety in the power industry is an important component of the operation of the entire power system. This is not about a control function, but about the real protection of personnel, which saves human lives. According to regulatory documents, all means of protection are divided into basic and additional.
At the same time, the second group is in no way inferior to the first, it helps to avoid trouble, to become a lifesaver when working in electrical installations with more than 1,000 V. In the article, let's talk about dielectric bots: what is it, what standard controls quality and when protective equipment must be tested.
What are dielectric boots and overshoes?
Dielectric boots are a personal means of protecting operational and operational and maintenance personnel from electric shock. First of all, such a product allows you to avoid step voltage that occurs in networks andisolated neutral, as well as due to short circuits during switching. A separate case can be considered the implementation of a surge on a high-voltage power line on a switched on line.
The production of specialized shoes can be carried out by a company that has the appropriate license, and its products comply with state standards or specifications. Externally, the product has a one-piece appearance, consists of dense rubber. The outsole is grooved for good traction.
The use of protective equipment depends on the work performed and the conditions in which it will be carried out. According to the instructions and STP on safety, dielectric boots are used in the following cases:
- Carrying out operational switching in open and closed switchgears.
- Performing a surge that can cause a short circuit to ground through the ground electrode, the occurrence of step voltage.
- When a single-phase short circuit to earth in the isolated neutral. It is important to note that the use of shoes is required in any, even emergency situations on VL-10, 35 kV.
As for quality, the information provided is given in GOST 13385-78.
State Standards
Dielectric boots according to GOST 13385-78 are correctly called "Special dielectric footwear made of polymeric materials". The document spells out the main positions regarding the shape, size of products, what they are made of and whattest standards must be met. The latter is considered the basis for efficient operation and protection of personnel from high voltage.
Tests
The process of testing dielectric boots almost completely corresponds to that carried out with gloves. To do this, shoes are placed in a special vessel with water, into which an electric current of up to 20 kV is supplied. The procedure takes about 2 minutes. It is allowed to carry out the operation with several products at once. If a product fails the test, it is stamped with a red indelible ink.
When put into operation, bots must undergo a systematic check every 2 years. In some organizations, the submitted period is reduced on the basis of an order or other administrative documents signed by the chief engineer.
Safety
Dielectric boots are required not only to be tested, but also to carry out a scheduled inspection. According to regulatory documents, administrative and technical personnel should be engaged in such activities - once a month, products must be checked for mechanical damage. Also, before each use, they are tested by operational and repair personnel. It is important to note that wearing shoes on a permanent basis is unacceptable. It should be worn only in cases described in the TB regulations.
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