Трехфазные трансформаторы заземления/зануления 11 кВ 22 кВ

Description

As a pioneer and the first dedicated original manufacturer in China's earthing transformer industry, decades of in-depth technical cultivation have enabled us to accumulate strong strength and even establish the original standards for industry development. From breakthroughs in core technology R&D to large-scale mass production and delivery, we have built an end-to-end independent ecosystem. Leveraging leading and stable product performance as well as extremely reliable quality, we have become a trusted choice in the field of power grid construction.

This three - phase 11kV/22kV grounding transformer is tailor - made for medium - voltage power grids. By creating an artificial neutral point, it accurately achieves the grounding protection function and is suitable for various distribution system scenarios. When facing single - phase grounding faults, it can effectively handle them, building a solid defense for the stable operation of urban power grids and industrial power facilities, and ensuring the reliable power supply of the power system.

Features

• Flexible Voltage Adaptation: Supports 11kV and 22kV voltage systems, accurately matches the specifications of common medium - voltage power grids, is widely adaptable to diverse power application scenarios, and has strong compatibility.

• Intelligent Fault Management: When encountering single - phase faults, it quickly suppresses arc - grounding overvoltages, greatly reduces fault currents, reduces the risk of damage to power equipment, and improves the operation and maintenance efficiency of the system.

• Reliable and Robust Structure: Adopts high - quality iron cores, durable windings, and is matched with a robust shell. It effectively resists the erosion of harsh environments such as moisture and dust, ensures the long - term stable operation of the equipment, and reduces maintenance costs.

• Comprehensive Safety Assurance: Stably provides neutral point grounding, prevents voltage fluctuations and insulation faults from the source, safeguards the safety of the power grid and associated electrical equipment, and builds a solid foundation for the safety of the power system.

Main technical parameter

Some of these earthing transformers cover voltage levels including：3.3kV / 6kV / 11kV / 15kV / 20kV / 22kV / 30kV / 33kV / 34.5kV / 36kV / 44kV / 66kV / 88kV / 110kV / 132kV / 145kV / 150kV / 220kV / 275kV / 330kV / 400kV, etc. The current withstand time ranges from 1s, 2s, 3s, 5s, 6s, 8s, 9s, 10s, 30s, 60s, 1hour to 2hours, and customization is available.

Application Environment Description

• Neutral Grounding Systems：Suitable for ungrounded, resistance-grounded, or arc-suppression-coil grounded medium-voltage distribution networks. Limits fault current and improves power supply reliability.

• Harsh Physical Environments：IP54/IP56 protection rating, resistant to salt mist and dust. Suitable for altitudes up to 3000m and ambient temperatures from -25°C to +45°C.

• Space-Constrained Locations：Compact dry-type design suitable for confined spaces such as underground substations, data centers, and ship engine rooms.

• New Energy and Industrial Applications：Neutral grounding protection for systems including wind/solar power plants, rail transit, mining facilities, and oil platforms.

• Special Electrical Environments：Compatible with systems containing harmonic pollution, frequent start-stop loads, and smart grids requiring coordination with protection devices.