What are the structures and characteristics of solid insulated switchgear?

Solid insulation switchgear is a type of switchgear that uses solid insulation materials as the medium, and has characteristics such as full insulation, full sealing, and maintenance free. Its structure mainly consists of cabinet, vacuum circuit breaker, energy storage mechanism, grounding switch, comprehensive protector, etc. The specific characteristics are as follows:

Core structure composition

-Cabinet: Adopting a metal enclosed structure, it internally encapsulates components such as vacuum arc extinguishing chamber, isolation switch, grounding switch, etc., with a protection level of up to IP67.  

-Vacuum circuit breaker: The main contact is installed in a sealed vacuum chamber, and the insulation performance is improved through an insulating material base.  

-Energy storage mechanism: Driven by an electric motor, it stores energy through springs and is used for circuit breaker closing operations.  

-Grounding knife switch: mechanically interlocked with the cabinet door to ensure that the cabinet door cannot be opened when energized.  

Characteristics of Insulation Technology

-Solid sealed pole: APG technology is used to pour the vacuum arc extinguishing chamber and conductive components into epoxy resin to form a single-phase switch unit.  

-Three position knife switch: integrated into the fixed sealing pole, supporting three position operation of work/isolation/grounding.  

-Interface processing: Ensure the interface strength of insulation materials through techniques such as partial discharge detection and X-ray perspective.  

Advantages and application scenarios

-Advantages: Corrosion resistance, moisture resistance, small footprint, suitable for harsh environments such as marine oil and gas fields.  

-Modular design: supports functional unit expansion and can be quickly combined into different configurations.