Product overview
The FZW32-12/40.5kv outdoor high-voltage isolation vacuum load switch (hereinafter referred to as the load switch) is a new generation of high-voltage electrical products produced by our company. After strict type testing and long-term trial operation assessment, all technical performance indicators have reached GB3804 and IE standards, suitable for power supply networks with rated voltage 40.5kV, rated current 1250A, and three-phase AC 50Hz.
Product Description
1. Using vacuum arc extinguishing, no explosion risk, no maintenance required
2. The isolation knife is linked to the three-phase vacuum arc extinguishing chamber, and there is an obvious isolation fracture when opening.
3. All parts of the machine body are made of stainless steel, and the chassis is made of stainless steel or hot-dip galvanized carbon steel with anti-UV protective coating, ensuring the normal operation of the machine in outdoor environments.
4. The installation method is mainly double-pole type and electric operation. Electric or remote control operation can also be used.
5. Large breaking capacity, safe and reliable, long electrical life, and can be operated frequently.
6. Widely used in the transformation of rural power grids, urban power grids, railways and other distribution lines.
working principle
The load switch is composed of two major components: an isolation knife and a vacuum arc extinguishing chamber. The isolation knife is responsible for the insulation function during closing and opening, and the vacuum arc extinguishing chamber is responsible for extinguishing the arc.
The isolation knife is closed and opened by a spring over-center mechanism. The over-center spring provides the energy required when the isolation knife is closed and ensures that the vacuum arc extinguishing chamber extinguishes the arc when opening without being affected by human factors. , during the opening process of the isolation knife of the vacuum arc extinguishing chamber, there is a rapid mechanism to provide the opening speed of the arc extinguishing chamber. The three-phase linkage operation of the isolation knife ensures the synchronization of the opening of the arc extinguishing chamber.
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