The Inflatable Cabinet Current Transformer is a current measurement and protection device designed for gas-insulated switchgear systems such as C-GIS. It measures primary current and provides accurate signals for metering and relay protection within compact switchgear cabinets. Comewill, a professional supplier, provides quality Inflatable Cabinet Current Transformer that are in stock.
An Inflatable Cabinet Current Transformer is installed inside gas-insulated switchgear cabinets where the insulation medium may be sulfur hexafluoride (SF₆) or dry air. It converts high primary current into a standardized secondary current, usually 5A or 1A, which can be safely used by meters, relays, and protection devices.
Because the transformer is designed for C-GIS switchgear structures, it is typically mounted around the cable inlet or outlet conductor. The compact size allows it to fit inside sealed switchgear compartments while maintaining stable insulation performance.
Comewill is a professional factory, producing Inflatable Cabinet Current Transformer equipment focuses on structural reliability and installation compatibility.
1. Epoxy Resin Casting Structure
The iron core and secondary windings are encapsulated with epoxy resin, forming a sealed and flame-retardant body.
2. Compact Installation Design
The small size and light weight allow installation directly on cable circuits or busbars inside inflatable cabinets.
3. Sealed Primary Conductor
The primary conductor is usually enclosed within a stainless-steel or insulated housing to maintain insulation integrity.
4. Natural Cooling Design
Integrated insulation and heat dissipation allow the transformer to operate without additional cooling equipment.
Rated Primary Current
Common ranges include 20A to 600A, depending on distribution network requirements.
Rated Secondary Current
Standard outputs are 5A or 1A for measurement and protection equipment.
Accuracy Class
Typical combinations include 0.5 / 10P, supporting both metering and relay protection functions.
Rated Frequency
Most units operate at 50Hz or 60Hz.
Insulation Level
Typical insulation levels are 12/42/75kV, suitable for medium-voltage switchgear applications.
Environmental Adaptability
The Inflatable Cabinet Current Transformer is designed for operation in enclosed switchgear environments that may experience challenging conditions.
Temperature Range
Typical operating temperatures range from −5°C to +45°C.
Pollution Resistance
Sealed insulation reduces the influence of dust, humidity, and contamination.
High-Altitude Operation
Many designs support installation in areas up to 3000 meters above sea level.
Gas-Insulated Compatibility
Some new designs use dry air instead of SF₆ as the insulation medium to reduce environmental impact.
A reliable China supplier of Inflatable Cabinet Current Transformer equipment provides products used in multiple power distribution sectors.
Common applications include:
Urban rail transit power systems
Industrial distribution networks
Metallurgy and petrochemical plants
Medium-voltage substations
High-altitude power grid infrastructure
