YH series composite jacket lightning arrester
Short Description:
Surge arresters are the foundation for insulation coordination of various electrical equipment in power systems, such as transformers, reactors, capacitors, generators, motors, PTs, CTs, circuit breakers, contactors, etc. The protection performance of surge arresters determines the internal and external insulation indicators of electrical equipment in power systems, including short-time power frequency withstand voltage, lightning impulse withstand voltage, and operational impulse withstand voltage.
Product details
overview
Surge arresters are the foundation for insulation coordination of various electrical equipment in power systems, such as transformers, reactors, capacitors, generators, motors, PTs, CTs, circuit breakers, contactors, etc. The protection performance of surge arresters determines the internal and external insulation indicators of electrical equipment in power systems, including short-time power frequency withstand voltage, lightning impulse withstand voltage, and operational impulse withstand voltage.
Metal oxide lightning arrester, commonly known as "zinc oxide lightning arrester", is a new type of lightning arrester that was popularized and expanded internationally in the 1980s by countries such as the United States and Japan. It is a product of conventional lightning arrester. After fully introducing this technology in the mid-1980s, China has digested it through years of practice. Currently, the performance of AC lightning arrester from various professional lightning arrester factories is not much different from that of products from countries such as the United States, Japan, and Western Europe. Products that truly meet all the requirements of national standards can also meet all the requirements of international IEC standards.
The core working component of this product is made of multi-element oxide powder mainly composed of zinc oxide, which has excellent nonlinear state safety characteristics, fast steep wave response, and large current capacity. The products with gaps adopt self blowing gap and uniform pressure irradiation structure, which reduces the dispersion of discharge and has a low impact coefficient.
The adoption of composite insulation jackets conforms to the trend of miniaturization, safety, and maintenance free development of international power products. Compared with traditional inorganic materials such as ceramics and glass, polymer organic composite materials have concerns about small volume, light weight, resistance to pollution and cleaning, explosion and vibration. It is the preferred lightning protection component in integrated and modular complete sets of medium and high voltage transmission and transformation equipment.
Low usage and execution standards
This product is used in AC 220KV and below power generation, transmission, transformation, and distribution systems to limit the amplitude of lightning and internal operating overvoltage to a specified level. It is used for the entire system
Basic equipment for insulation coordination. Meanwhile, this product cannot be used to limit resonance overvoltage, and other methods are required for system resonance elimination. This product model is formulated according to the provisions of JB/T8459-1996 "Method for Formulating Lightning Arrester Product Models", and the gapless product complies with the GB11032-2000 "AC gapless metal oxide lightning arrester" standard; Products with gaps shall comply with the JB Ä T9672-2005 standard for series limited metal oxide surge arresters. The important parameters and configuration methods clearly defined by Zhu in the above standards. Revise and implement according to the requirements of DLIT620-1997 "Overvoltage Protection and Insulation Coordination for AC Electrical Installations".
