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What is high voltage switchgear?
Sep 11 , 2020
The high-voltage switchgear is an electrical equipment based on circuit breakers. It means that the manufacturer connects the relevant high and low voltage electrical appliances (including control appliances, protective appliances, and measuring appliances), bus bars, current-carrying conductors, Insulators, etc. are assembled in a closed or open metal cabinet as a device for receiving and distrib...
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What is the significance of five prevention of high voltage switchgear
Oct 23 , 2020
In order to ensure the safe operation of power network, the safety of equipment, person, and prevent misoperation, GB3906--1991 (3 ~ 35 kV AC metal Enclosed Switching Equipment) is clearly stipulated metal enclosed switching equipment shall have the following functions: 1、To prevent opening and closedisconnector(Isolate handcart)on-load. 2、To prevent mis-opening and mis-closing of circuit breakers...
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ZW68-12 Intelligent Complete set of Pole-mounted circuit breaker Introduction
Oct 27 , 2020
The ZW68-12 intelligent complete set of pole-mounted circuit breaker is a new generation of integrated intelligent automatic vacuum circuit breaker. Suitable for protection and control in power distribution systems of substations and industrial and mining enterprises, and more suitable for rural power grids and frequently operated places. It's a second-time fusion product: Deep integration of isol...
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12kV STANDARDIZED CUSTOMIZED SWITCHGEAR
Oct 29 , 2020
According to relevant sources,for the latest bidding equipment of State Grid, the proportion of standardized customized switchgear will reach 30% in 2019, 60% in 2020 and 100% in 2021.Since September this year, Fujian, Jiangsu, Hunan, Tianjin, Inner Mongolia, Anhui, Sichuan and other provinces and cities distribution network material agreement inventory bidding procurement have standardized custom...
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VB5 (ZN21B) -12 Vacuum Circuit Breaker Product Structure and Working Principle
Nov 06 , 2020
1. Electrical Structure (see Figure 1) Figure 1 Schematic diagram of solid-sealed pole structure The electrical main circuit part of VB5 (ZN21B) adopts advanced epoxy resin casting technology, and the vacuum interrupter is directly sealed in epoxy resin, and there is a silicone rubber buffer layer between the two, which becomes a casting type circuit breaker pole. column. This process makes the co...
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High Voltage Switchgear Installation Of Busbar
Nov 18 , 2020
1．Main bus installation The main busbar use rectangular busbar in switchgear. In consideration of the convenience of installing the main bus, the main bus is segmented made according to the width and length of the cabinet. The basic steps of main bus installation are as follows: 1）After inspecting the busbar bushing without damage, install busbar bushing and supporting busbar bushing board 2）Wipe ...
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Switchgear Handcart,shell, baffle and pressure relief device
Nov 26 , 2020
Switchgear shell, baffle and pressure relief device The shell and baffle of the switchgear are assembled by high-strength bolts (or rivets) after being processed and bent by CNC machine tools with anti-oxidation and anti-corrosion aluminum-zinc plates. Therefore, the assembled switchgear can ensure the uniformity on the size and high mechanical strength. The door surface paint of switchgear adopts...
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Operation Of Circuit Breaker Cabinet With Earth Switch
Dec 03 , 2020
1. Circuit breaker handcar enters the cabinet: Inspect the condition of the circuit breaker carefully，check whether it is in good condition before circuit breaker handcar enter into the cabinet. Whether the circuit breaker is in the opening state, otherwise, must opening first. Whether tools and other sundries are omitted in the handcar, after confirming good, push the handcar into the cabinet and...
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When you want to buy switchgears, you should know some basic knowledge (part 1)
Dec 08 , 2020
When you want to buy switchgears, you should know some basic knowledge for "What? How? Why?" (part 1) 1．Why is switchgear called "complete set"? What kinds of cabinet does it compose of? Switchgear is composed of incoming line, metering, PT, outgoing line, etc. Primary and secondary Components are installed inside the cabinet, when buying, must form a complete set, so we call "complete set". 2. Wh...
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