North American solid insulated ring main unit

A switchgear system capable of operating at voltages up to 27 kV includes an enclosure containing atmosphere and a load circuit breaker module located within the enclosure. The load switch module includes a load circuit breaker module housing made of solid dielectric material, a vacuum circuit breaker enclosed within the load circuit breaker module housing and having fixed and movable contacts, and an interchange device electrically connected to the movable contacts. The vacuum interrupter is operable to selectively disconnect or establish electrical pathways between the exchange device and terminals in response to the movement of movable contacts relative to fixed contacts. The switchgear system also includes a casing coupled to the housing and an isolation switch electrically connected in series between the load circuit breaker module and the casing. The isolation switch includes an isolation switch housing made of solid dielectric material.

Air insulated switchgear exposes live components to corrosion, unnecessary animal invasion, atmospheric conditions or dust pollution, and other factors that may cause premature failure of the switchgear. The solid insulated switchgear adopts a stainless steel mechanism shell, which ensures fault free performance even in high humidity, salt spray or flood environments.

Solid state insulated switchgear is a functional substitute that matches existing oil and SF6 insulation products, and is an excellent alternative for applications where liquid or gas insulation is not preferred. Solid state switchgear adopts the same validated vacuum technology (all high-voltage operations occur in the vacuum contact chamber), and has over 50 years of industry-leading quality and performance, as well as the convenience of cyclic phosphate solid polymer insulation for active switching components. Solid characteristics of the tray: • 15kV and 25kV 60Hz three-phase linked submersible vacuum load switchgear components, with a continuous rated current of 630 amperes, used in AC distribution systems • The device includes a sealed port and pressure gauge for visually indicating the integrity of the shell seal. • Manual or remote operation buttons; Motor operator options • Industry's smallest solid medium load disconnect switchgear • Time proven flip drive mechanism for improved safety

Ultra low maintenance switchgear with front enclosed design of 100% 304 or 304L corrosion-resistant stainless steel structure. All load closing and opening occur in a sealed vacuum arc extinguishing chamber, fully submersible with pressure gauge sealing, maintenance free switch box copper internal busbar structure, remote/SCADA operator buttons. All switch circuits have auxiliary contacts designed for the harshest environments. Industry leading warranty and service. All products comply with applicable ANSI, IEEE, and IEC standards

The design of air insulated switchgear exposes operators to live parts when the door is opened and during switch or fuse replacement, which significantly increases the risk of exposure to arc flash. Solid insulation technology provides a truly visible fracture that can be seen within the safe proximity required for arc flash safety. The fully enclosed design in front of the cabinet can prevent operators from being exposed to arc flashes due to foreign objects coming into contact with live parts or misalignment when closing fuses to live circuits.

Manufacturers of air insulated switchgear recommend conducting a visual inspection every five years. Moreover, if the barrier or switch mechanism is not aligned and needs to be adjusted, the entire switchgear must be completely powered off and grounded. All components in solid insulated switchgear are encapsulated in epoxy resin molds and do not require maintenance, lubrication, or adjustment. During the service life of the switchgear, the resettable vacuum fault circuit breaker does not need to be replaced, and it provides five times more load breaking operations than air insulated switchgear.